यैंडेक्स में परीक्षण। मैचर्स: जब वे उपयोगी होते हैं और उनका उपयोग करना कितना आसान होता है

जैसा कि आपने दाईं ओर की तस्वीर से अनुमान लगाया है, हम स्वचालित परीक्षण के बारे में बात करेंगे। मैचर्स के रूप में ऐसी तकनीक के बारे में अधिक सटीक रूप से। वे कोड डुप्लीकेशन को गंभीरता से कम करने और धारणा के लिए परीक्षण कोड को सरल बनाने में मदद करते हैं, और मैचर्स का निर्माण और उपयोग करना काफी सरल है।

मैचर्स की तकनीक अपने आप में नई नहीं है - अपने वर्तमान स्वरूप में इसे जुलाई 2012 में रिपॉजिटरी में अपलोड किया गया था, और यह पहले भी दिखाई दी थी। लेकिन, इसके बावजूद, कई ने अभी भी इसके बारे में नहीं सुना है, या किसी कारण से इससे बचें। हम आपको यह बताना चाहते हैं कि इसके उपयोग से लाभ प्राप्त करना कितना आसान है, और आपके साथ हमारी लाइब्रेरी ऑफ़ मैचर्स साझा करना है।

मान लीजिए कि हमारे पास कुछ फलों का एक सेट है। उनमें से, सबसे आम दौर, नारंगी और मीठा।

public class Fruit { ... public Color getColor() {...} public boolean isSweet() {...} public Shape getShape() {...} } 

यह ज्ञात है कि एक नारंगी ऐसी स्थितियों को संतुष्ट करता है। फलों के अलावा, हमारे पास एक कन्वेयर भी है जिसके माध्यम से ऐसे फलों को पारित किया जा सकता है। कन्वेयर के लिए एक कार्य भी है - परीक्षणों की एक श्रृंखला का आयोजन करके संतरे को नहीं निचोड़ना।

और सौभाग्य - हमारे पास बस एक ऐसा उपकरण था जो यह निर्धारित कर सकता था कि कोई फल मीठा था और उसका रंग कैसा था, उसके आकार की तुलना कई प्रसिद्ध लोगों के साथ करें और कई और जाँच करें। इस उपकरण को JUnit कहा जाता है।

परीक्षण शुरू होने से पहले, एक नया फल कन्वेयर पर पड़ता है।

  @Before public void setUp() throws Exception { someFruit = getNextFruit(); } 

पहले हम यह निर्धारित करते हैं कि फल गोल है।

  @Test public void orangeIsRound() { assertEquals("Expected shape - " + Shape.ROUND + ", but was - " + someFruit.getShape(), someFruit.getShape(), Shape.ROUND); } 

तब वह फल मीठा होता है।

  @Test public void orangeIsSweet() { assertTrue("Fruit should be sweet - expected TRUE", someFruit.isSweet()); } 

और अंत में, इसके रंग को देखें।

  @Test public void orangeHasOrangeColor() { assertEquals("Orange has orange color, but was - " + someFruit.getColor(), someFruit.getColor(), Color.ORANGE); } 

तुरंत स्पष्ट क्या हैं? सबसे पहले, प्रत्येक चेक में अपेक्षित मूल्य, वास्तविक मूल्य, अतिरिक्त शोधन के मूल्य और विभिन्न अनुमानों के साथ एक टिप्पणी को गोंद करना आवश्यक था। यहां तक ​​कि इस सूची का वर्णन थकाऊ है।

दूसरे, कल्पना कीजिए कि हमने संतरे की किस्म को भी निर्धारित करने का फैसला किया है, इसके लिए एक विशेष "टस्टर" जोड़ा है, और उससे कहा: "केवल वालेंसिया किस्म को स्वीकार करें।" लेकिन "तेज़" को नहीं पता है कि परीक्षण मशीन ने क्या फैसला किया है, अगर वह खुद से नहीं पूछता है, तो मशीन बातूनी नहीं है। अंत में, वह एक पंक्ति में सब कुछ करने की कोशिश करेगा। एक गेंद के साथ "टस्टर" को जहर न देने के लिए, क्योंकि उनके पास मिठास की जांच करने का समय नहीं था, आपको उसे सब कुछ अनदेखा करना सिखाना होगा। ऐसा करने के लिए, उसे मशीन से अलग और स्वतंत्र रूप से पूछने की जरूरत है, जिसके बाद सभी खारिज किए गए लोगों को अलग रखा जाना चाहिए और अब स्पर्श नहीं करना चाहिए।

"जस्टर" हमारे JUnit डिवाइस में सिर्फ एक और परीक्षण है, इसलिए आपको परीक्षण को मानने के लिए अंतर्निहित रनटाइम तंत्र का उपयोग करना चाहिए। फिर चखने की शुरुआत का परिदृश्य इस तरह दिखाई देगा।

  @Test public void degusto() { assumeTrue("Expected shape - " + Shape.ROUND + ", but was - " + someFruit.getShape(), someFruit.getShape().equals(Shape.ROUND)); assumeTrue("Fruit should be sweet - expected TRUE", someFruit.isSweet()); assumeTrue("Orange has orange color, but was - " + someFruit.getColor(), someFruit.getColor().equals(Color.ORANGE)); //        . } 

यह स्पष्ट रूप से देखा गया है कि स्क्रिप्ट के इस विवरण के साथ प्रत्येक नए "टस्टर" के दो तरीके हैं - स्क्रिप्ट की कॉपी-पेस्ट करें या प्री-चेक के प्रत्येक सेट के लिए एक नई विधि बनाएं। और प्रत्येक प्री-चेक में फिर से, आपको खुद को अस्वीकृति के कारण के बारे में एक संदेश संकलित करने की आवश्यकता है। इनमें से कोई भी विकल्प बनाए रखना मुश्किल है और यह देखने में बहुत डरावना है।

उसके शीर्ष पर, आपको assertEquals , assertNotEquals , assertNotNull , assertArrayEquals , इत्यादि को assertArrayEquals । मानक JUnit पैकेज में, ये जोर * लगभग किसी भी तुच्छ मामले के लिए हैं। और कुछ और, प्रत्येक प्रकार के तर्क के लिए। अर्थात्, सत्यापन तर्क विधि के नाम पर निहित है और इसके कार्यान्वयन के लिए सख्ती से बंधा हुआ है। अब कल्पना करें कि प्रत्येक आंसर * के लिए कितना कोड डुप्लिकेट और बनाए रखने की आवश्यकता होगी * आपको एक समान धारणा बनाना होगा *।

इसलिए, आपको सत्यापन के तर्क, विवरण के आउटपुट और निर्णय लेने के कार्य को अलग करने की आवश्यकता है:

• अस्वीकार - मुखर,
• अनदेखा - ग्रहण करना
• छानने के साथ-साथ सही लोगों की तलाश करना, शिफ्ट करना, बदलना आदि।

यह वह जगह है जहाँ मैच खेलने वाले आते हैं - छोटी-छोटी वस्तुएँ जिनमें निर्णय लेने का तर्क होता है, वे जानते हैं कि उन्हें किस चीज़ का इंतज़ार है और उन्हें क्या मिला है, जो वे स्वतंत्र रूप से रिपोर्ट करते हैं। मैचर्स की मदद से पहले तीन चेक लगभग कार्रवाई का वर्णन करते हैं। और जो कोई जानना चाहता है कि स्क्रिप्ट क्या कर रही है वह इसे पढ़ सकता है।

  @Test public void orangeIsRoundWithMatcher() { assertThat(someFruit, is(round())); } @Test public void orangeIsSweetWithMatcher() { assertThat(someFruit, is(sweet())); } @Test public void orangeHasColorWithMatcher() { assertThat(someFruit, hasColor(Color.ORANGE)); } 

ऐसी सुंदरता के लिए, एक विशेष हैमरेस्ट पुस्तकालय है। इसमें कार्यान्वयन के लिए एक इंटरफ़ेस होता है, और एसेरटैट और एसेथटैट मेथड्स (उत्तरार्द्ध, वास्तव में, JUnit के अंदर होता है, लेकिन Hamcrest से इंटरफ़ेस का उपयोग करता है)। वे गेमर से वस्तु के बारे में पूछते हैं, निर्णय लेते हैं।

संस्करण 4.11 के साथ शुरू, ज्यूनिट निर्भरताओं में, हैमरेस्ट लाइब्रेरी का संस्करण 1.3 से कम नहीं है। वह वह थी जिसने इंटरफ़ेस पेश किया था जिसमें आगे वर्णित सब कुछ लागू किया गया है। इसलिए, मावेन का उपयोग करते हुए, यह JUnit 4.11 को जोड़ने के लिए पर्याप्त है, और उपकरण का न्यूनतम आवश्यक सेट उपयोग के लिए तैयार है। और हैमरेस्ट डिलीवरी से सभी उपलब्ध खिलाड़ियों के पूर्ण सेट के लिए, आपको हैमरेस्ट-सभी कलाकृतियों की आवश्यकता होगी, जिन्हें अलग से जोड़ा जा सकता है।

यह आपके पोम की तरह लग सकता है ।

यह कैसे काम करता है?

पुस्तकालय में एक अमूर्त वर्ग TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

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, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


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public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java . TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


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3 :

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public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

• TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

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, f eatureValueOf . Hamcrest .

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public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .
• TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .
• TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

 TypeSafeMatcher,     .      : 
 
 public boolean matchesSafely(Fruit fruit) —  , public void describeTo(Description description) —   , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) —   . 
 
  ,  ,       —      null    . 
 
 , ,   ,  : 
 
 public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } } 
 
    . ,  ,  ,        ,         —   ! 
 
      
  , , , ,         .     —     .       Java    FeatureMatcher<WhatWeGet, WhatWeWannaCheck> ,   :           . 
 
        3 : 
 
 ,    WhatWeWannaCheck ,   (    ),    (   - ) 
   ,   f eatureValueOf            .     Hamcrest     . 
 
     ,     ,   . 
 
 public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } } 
 
 Feel the POWER OF MATCHERS 
      —   .    Hamcrest     : allOf, anyOf, both, either.         ,      . 
 
  ,     «»   : 
  @Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); //    } 
 
    . 
 
     ,    , —       . ,                 .      —   : 
 @Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); } 
  ,   :     .   — ,         ,   hasItem() . 
 
     . 
 
     
    ,             .        ,    —  ,   - .     ,     , — ,   .           ,       -.          . 
 
       github.com/yandex-qatools/matchers-java . 

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

• TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .
• TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .
• TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

 TypeSafeMatcher,     .      : 
 
 public boolean matchesSafely(Fruit fruit) —  , public void describeTo(Description description) —   , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) —   . 
 
  ,  ,       —      null    . 
 
 , ,   ,  : 
 
 public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } } 
 
    . ,  ,  ,        ,         —   ! 
 
      
  , , , ,         .     —     .       Java    FeatureMatcher<WhatWeGet, WhatWeWannaCheck> ,   :           . 
 
        3 : 
 
 ,    WhatWeWannaCheck ,   (    ),    (   - ) 
   ,   f eatureValueOf            .     Hamcrest     . 
 
     ,     ,   . 
 
 public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } } 
 
 Feel the POWER OF MATCHERS 
      —   .    Hamcrest     : allOf, anyOf, both, either.         ,      . 
 
  ,     «»   : 
  @Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); //    } 
 
    . 
 
     ,    , —       . ,                 .      —   : 
 @Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); } 
  ,   :     .   — ,         ,   hasItem() . 
 
     . 
 
     
    ,             .        ,    —  ,   - .     ,     , — ,   .           ,       -.          . 
 
       github.com/yandex-qatools/matchers-java . 

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

 TypeSafeMatcher,     .      : 
 
 public boolean matchesSafely(Fruit fruit) —  , public void describeTo(Description description) —   , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) —   . 
 
  ,  ,       —      null    . 
 
 , ,   ,  : 
 
 public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } } 
 
    . ,  ,  ,        ,         —   ! 
 
      
  , , , ,         .     —     .       Java    FeatureMatcher<WhatWeGet, WhatWeWannaCheck> ,   :           . 
 
        3 : 
 
 ,    WhatWeWannaCheck ,   (    ),    (   - ) 
   ,   f eatureValueOf            .     Hamcrest     . 
 
     ,     ,   . 
 
 public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } } 
 
 Feel the POWER OF MATCHERS 
      —   .    Hamcrest     : allOf, anyOf, both, either.         ,      . 
 
  ,     «»   : 
  @Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); //    } 
 
    . 
 
     ,    , —       . ,                 .      —   : 
 @Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); } 
  ,   :     .   — ,         ,   hasItem() . 
 
     . 
 
     
    ,             .        ,    —  ,   - .     ,     , — ,   .           ,       -.          . 
 
       github.com/yandex-qatools/matchers-java . 

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

 TypeSafeMatcher,     .      : 
 
 public boolean matchesSafely(Fruit fruit) —  , public void describeTo(Description description) —   , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) —   . 
 
  ,  ,       —      null    . 
 
 , ,   ,  : 
 
 public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } } 
 
    . ,  ,  ,        ,         —   ! 
 
      
  , , , ,         .     —     .       Java    FeatureMatcher<WhatWeGet, WhatWeWannaCheck> ,   :           . 
 
        3 : 
 
 ,    WhatWeWannaCheck ,   (    ),    (   - ) 
   ,   f eatureValueOf            .     Hamcrest     . 
 
     ,     ,   . 
 
 public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } } 
 
 Feel the POWER OF MATCHERS 
      —   .    Hamcrest     : allOf, anyOf, both, either.         ,      . 
 
  ,     «»   : 
  @Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); //    } 
 
    . 
 
     ,    , —       . ,                 .      —   : 
 @Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); } 
  ,   :     .   — ,         ,   hasItem() . 
 
     . 
 
     
    ,             .        ,    —  ,   - .     ,     , — ,   .           ,       -.          . 
 
       github.com/yandex-qatools/matchers-java . 

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .

TypeSafeMatcher, . :

public boolean matchesSafely(Fruit fruit) — , public void describeTo(Description description) — , protected void describeMismatchSafely(Fruit item, Description mismatchDescription) — .

, , — null .

, , , :

public class ShapeMatcher extends TypeSafeMatcher<Fruit> { private Shape expected; public ShapeMatcher(Shape expected) { this.expected = expected; } @Override public boolean matchesSafely(Fruit fruit) { return expected.equals(fruit.getShape()); } @Override protected void describeMismatchSafely(Fruit item, Description mismatchDescription) { mismatchDescription.appendText("fruit has shape - ").appendValue(item.getShape()); } @Override public void describeTo(Description description) { description.appendText("shape - ").appendValue(expected); } @Factory public static ShapeMatcher round() { return new ShapeMatcher(Shape.ROUND); } }

. , , , , — !


, , , , . — . Java FeatureMatcher<WhatWeGet, WhatWeWannaCheck> , : .

3 :

, WhatWeWannaCheck , ( ), ( - )
, f eatureValueOf . Hamcrest .

, , .

public class Matchers { public static Matcher<Fruit> hasShape(final Shape shape) { return new FeatureMatcher<Fruit, Shape>(equalTo(shape), "fruit has shape - ", "shape -") { @Override protected Shape featureValueOf(Fruit fruit) { return fruit.getShape(); } }; } public static Matcher<Fruit> round() { return hasShape(Shape.ROUND); } public static Matcher<Fruit> sweet() { return new FeatureMatcher<Fruit, Boolean>(is(true), "fruit should be sweet", "sweet -") { @Override protected Boolean featureValueOf(Fruit fruit) { return fruit.isSweet(); } }; } public static Matcher<Fruit> hasColor(Color color) { return new FeatureMatcher<Fruit, Color>(equalTo(color), "fruit have color - ", "color -") { @Override protected String featureValueOf(Fruit fruit) { return fruit.getColor(); } }; } }

Feel the POWER OF MATCHERS
— . Hamcrest : allOf, anyOf, both, either. , .

, «» :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assumeThat(someFruit, both(round()).and(sweet()).and(hasColor(Color.ORANGE))); // }

.

, , — . , . — :
@Test public void orangeBothSweetRoundAndOrangeColorWithMatchers() throws Exception { assertThat(someFruitList, everyItem(both(round()).and(sweet()).and(hasColor(Color.ORANGE)))); }
, : . — , , hasItem() .

.


, . , — , - . , , — , . , -. .

github.com/yandex-qatools/matchers-java .