How to use CoreMatchers class of org.hamcrest package

Best junit code snippet using org.hamcrest.CoreMatchers

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...1213import java.lang.invoke.MethodType;14import java.lang.reflect.Modifier;1516import static org.hamcrest.CoreMatchers.is;17import static org.junit.Assert.assertThat;1819@ExcludeFromJMPLib20public class InstrumentationTest {21 private static IIntercessor Intercessor = new SimpleIntercessor().createIntercessor();22 private static IEvaluator Evaluator = new SimpleEvaluator().createEvaluator();2324 @BeforeClass25 public static void initialize() throws StructuralIntercessionException {26 Intercessor.addField(HolderToModify.class, new jmplib.reflect.Field(long.class, "_aux"));27 }2829 @Test30 public void testAssign() {31 Holder h = new Holder();32 h.f1 = "hi";33 assertThat(h.f1, is("hi"));34 h.f2 = 4;35 assertThat(h.f2, is(4));36 h.f1 += "!";37 assertThat(h.f1, is("hi!"));38 h.f2 += 4;39 assertThat(h.f2, is(8));40 h.f2 -= 2;41 assertThat(h.f2, is(6));42 h.f2 *= 3;43 assertThat(h.f2, is(18));44 h.f2 /​= 9;45 assertThat(h.f2, is(2));46 }4748 @Test49 public void testIncrement() {50 Holder h = new Holder();51 h.f2++;52 assertThat(h.f2, is(1));53 h.f2--;54 assertThat(h.f2, is(0));55 assertThat(++h.f2, is(1));56 assertThat(h.f2++, is(1));57 assertThat(h.f2, is(2));58 assertThat(--h.f2, is(1));59 assertThat(h.f2--, is(1));60 assertThat(h.f2, is(0));61 }6263 @Test64 public void testAssignVersions() {65 HolderToModify h = new HolderToModify();66 h.f1 = "hi";67 assertThat(h.f1, is("hi"));68 h.f2 = 4;69 assertThat(h.f2, is(4));70 h.f1 += "!";71 assertThat(h.f1, is("hi!"));72 h.f2 += 4;73 assertThat(h.f2, is(8));74 h.f2 -= 2;75 assertThat(h.f2, is(6));76 h.f2 *= 3;77 assertThat(h.f2, is(18));78 h.f2 /​= 9;79 assertThat(h.f2, is(2));80 }8182 @Test83 public void testIncrementVersions() {84 HolderToModify h = new HolderToModify();85 h.f2++;86 assertThat(h.f2, is(1));87 h.f2--;88 assertThat(h.f2, is(0));89 assertThat(++h.f2, is(1));90 assertThat(h.f2++, is(1));91 assertThat(h.f2, is(2));92 assertThat(--h.f2, is(1));93 assertThat(h.f2--, is(1));94 assertThat(h.f2, is(0));95 }9697 @Test98 public void testAssignFromVersions() throws StructuralIntercessionException {99 Intercessor.addMethod(HolderToModify.class,100 new jmplib.reflect.Method("checkAssign", MethodType.methodType(void.class), "Holder h = new Holder();"101 + "h.f1 = \"hi\";" + "org.junit.Assert.assertThat(h.f1, org.hamcrest.CoreMatchers.is(\"hi\"));"102 + "h.f2 = 4;" + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(4));"103 + "h.f1 += \"!\";" + "org.junit.Assert.assertThat(h.f1, org.hamcrest.CoreMatchers.is(\"hi!\"));"104 + "h.f2 += 4;" + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(8));"105 + "h.f2 -= 2;" + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(6));"106 + "h.f2 *= 3;" + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(18));"107 + "h.f2 /​= 9;" + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(2));",108 Modifier.PUBLIC));109 Func_Holder_void invoker = Evaluator.getMethodInvoker(HolderToModify.class, "checkAssign",110 new MemberInvokerData<>(Func_Holder_void.class));111 invoker.invoke(new HolderToModify());112 }113114 @Test115 public void testIncrementFromVersions() throws StructuralIntercessionException {116 Intercessor.addMethod(HolderToModify.class,117 new jmplib.reflect.Method("checkIncrement", MethodType.methodType(void.class),118 "Holder h = new Holder();" + "h.f2++;"119 + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(1));" + "h.f2--;"120 + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(0));"121 + "org.junit.Assert.assertThat(++h.f2, org.hamcrest.CoreMatchers.is(1));"122 + "org.junit.Assert.assertThat(h.f2++, org.hamcrest.CoreMatchers.is(1));"123 + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(2));"124 + "org.junit.Assert.assertThat(--h.f2, org.hamcrest.CoreMatchers.is(1));"125 + "org.junit.Assert.assertThat(h.f2--, org.hamcrest.CoreMatchers.is(1));"126 + "org.junit.Assert.assertThat(h.f2, org.hamcrest.CoreMatchers.is(0));",127 Modifier.PUBLIC));128 Func_Holder_void invoker = Evaluator.getMethodInvoker(HolderToModify.class, "checkIncrement",129 new MemberInvokerData<>(Func_Holder_void.class));130 invoker.invoke(new HolderToModify());131 }132} ...

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1package org.firefly.provider.unit.test.junit;2import org.junit.Test;3import java.util.Set;4import static java.util.Arrays.asList;5import static org.hamcrest.CoreMatchers.allOf;6import static org.hamcrest.CoreMatchers.anyOf;7import static org.hamcrest.CoreMatchers.anything;8import static org.hamcrest.CoreMatchers.both;9import static org.hamcrest.CoreMatchers.containsString;10import static org.hamcrest.CoreMatchers.either;11import static org.hamcrest.CoreMatchers.endsWith;12import static org.hamcrest.CoreMatchers.equalTo;13import static org.hamcrest.CoreMatchers.everyItem;14import static org.hamcrest.CoreMatchers.hasItem;15import static org.hamcrest.CoreMatchers.instanceOf;16import static org.hamcrest.CoreMatchers.is;17import static org.hamcrest.CoreMatchers.isA;18import static org.hamcrest.CoreMatchers.not;19import static org.hamcrest.CoreMatchers.sameInstance;20import static org.hamcrest.CoreMatchers.startsWith;21import static org.junit.Assert.assertThat;22public class AssertThatDemoTest {23 @Test24 public void testAssertThat() {25 /​/​ assertThat的基本原理是,用指定的匹配器匹配指定的实际值。如果不匹配,则生成错误信息,并抛出AssertionError异常。26 /​/​ public static <T> void assertThat(String reason, T actual, Matcher<? super T> matcher) {27 /​/​ if (!matcher.matches(actual)) {28 /​/​ Description description = new StringDescription();29 /​/​ description.appendText(reason)30 /​/​ .appendText("\nExpected: ")31 /​/​ .appendDescriptionOf(matcher)32 /​/​ .appendText("\n but: ");33 /​/​ matcher.describeMismatch(actual, description);34 /​/​35 /​/​ throw new AssertionError(description.toString());36 /​/​ }37 /​/​ }38 assertThat("Hello, World!", is("Hello, World!"));39 assertThat("Hello, World!", equalTo("Hello, World!"));40 assertThat("Hello, World!", startsWith("Hello"));41 assertThat("Hello, World!", endsWith("World!"));42 assertThat("Hello, World!", containsString("llo, Wor"));43 assertThat(6, not(8));44 assertThat("Hello, World!", anyOf(startsWith("Hello"), endsWith("Welcome")));45 assertThat("Hello, World!", either(startsWith("Hello")).or(endsWith("Welcome")));46 assertThat("Hello, World!", allOf(startsWith("Hello"), endsWith("World!")));47 assertThat("Hello, World!", both(startsWith("Hello")).and(endsWith("World!")));48 assertThat("Hello, World!", isA(String.class));49 assertThat("Hello, World!", anything());50 assertThat("Hello, World!", instanceOf(String.class));51 Object o = new Object();52 assertThat(o, sameInstance(o));53 assertThat(asList(1, 2, 3), hasItem(3));54 assertThat(asList(1, 2, 3), everyItem(not(8)));55 /​/​ 自定义Matcher参考assertThat("Is fails", "Hello, World!", is("Hi, World!"))的定义和失败报告。56 /​/​ 可以在一个类比org.hamcrest.CoreMatchers的工具类中提供静态方法,该方法返回自定义Matcher。57 assertThat(Set.of(1, 2, 3), new HasElement<>(2));58 }59}

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1package com.clonegod.unittest.junit;2import static org.hamcrest.CoreMatchers.allOf;3import static org.hamcrest.CoreMatchers.anyOf;4import static org.hamcrest.CoreMatchers.both;5import static org.hamcrest.CoreMatchers.containsString;6import static org.hamcrest.CoreMatchers.equalTo;7import static org.hamcrest.CoreMatchers.everyItem;8import static org.hamcrest.CoreMatchers.hasItems;9import static org.hamcrest.CoreMatchers.not;10import static org.hamcrest.CoreMatchers.sameInstance;11import static org.hamcrest.CoreMatchers.startsWith;12import static org.junit.Assert.assertArrayEquals;13import static org.junit.Assert.assertEquals;14import static org.junit.Assert.assertFalse;15import static org.junit.Assert.assertNotNull;16import static org.junit.Assert.assertNotSame;17import static org.junit.Assert.assertNull;18import static org.junit.Assert.assertSame;19import static org.junit.Assert.assertThat;20import static org.junit.Assert.assertTrue;21import java.util.Arrays;22import org.hamcrest.core.CombinableMatcher;23import org.junit.Test;24/​**25 * 原始类型的断言26 * 对象的断言27 * 数组的断言28 * 集合的断言29 * 30 * assertXXX(failtureMessage, expectedValue, actualValue)31 * assertThat(failtureMessage, actualValue, Matcher)32 * 33 * @author Administrator34 *35 */​36public class AssertTest {37 38 @Test39 public void testAssertTrue() {40 assertTrue("failure - should be true", true);41 }42 43 @Test44 public void testAssertFalse() {45 assertFalse("failure - should be false", false);46 }47 48 @Test49 public void testAssertArrayEquals() {50 byte[] expected = "trial".getBytes();51 byte[] actual = "trial".getBytes();52 assertArrayEquals("failure - byte arrays not same", expected, actual);53 }54 @Test55 public void testAssertEquals() {56 assertEquals("failure - strings are not equal", "text", "text");57 }58 @Test59 public void testAssertNull() {60 assertNull("should be null", null);61 }62 63 @Test64 public void testAssertNotNull() {65 assertNotNull("should not be null", new Object());66 }67 @Test68 public void testAssertSame() {69 Integer aNumber = Integer.valueOf(768);70 assertSame("should be same", aNumber, aNumber);71 }72 73 @Test74 public void testAssertNotSame() {75 assertNotSame("should not be same Object", new Object(), new Object());76 }77 78 /​*********************************************************79 assertTaht + Matcher80 *********************************************************/​81 /​/​ >>> JUnit Matchers assertThat 82 @Test83 public void testAssertThatBothContainsString() {84 assertThat("albumen", both(containsString("a")).and(containsString("b")));85 }86 @Test87 public void testAssertThatHasItems() {88 assertThat(Arrays.asList("one", "two", "three"), hasItems("one", "three"));89 }90 @Test91 public void testAssertThatEveryItemContainsString() {92 assertThat(Arrays.asList(new String[] { "fun", "ban", "net" }), everyItem(containsString("n")));93 }94 /​/​ Core Hamcrest Matchers with assertThat95 @Test96 public void testAssertThatHamcrestCoreMatchers() {97 assertThat("good", allOf(equalTo("good"), startsWith("good")));98 assertThat("good", not(allOf(equalTo("bad"), equalTo("good"))));99 assertThat("good", anyOf(equalTo("bad"), equalTo("good")));100 assertThat(7, not(CombinableMatcher.<Integer> either(equalTo(3)).or(equalTo(4))));101 assertThat(new Object(), not(sameInstance(new Object())));102 }103}...

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1package in.ravidsrk.sample;2import org.hamcrest.core.CombinableMatcher;3import org.junit.Test;4import java.util.Arrays;5import static org.hamcrest.CoreMatchers.allOf;6import static org.hamcrest.CoreMatchers.anyOf;7import static org.hamcrest.CoreMatchers.both;8import static org.hamcrest.CoreMatchers.containsString;9import static org.hamcrest.CoreMatchers.equalTo;10import static org.hamcrest.CoreMatchers.everyItem;11import static org.hamcrest.CoreMatchers.hasItems;12import static org.hamcrest.CoreMatchers.not;13import static org.hamcrest.CoreMatchers.sameInstance;14import static org.hamcrest.CoreMatchers.startsWith;15import static org.junit.Assert.assertArrayEquals;16import static org.junit.Assert.assertEquals;17import static org.junit.Assert.assertFalse;18import static org.junit.Assert.assertNotNull;19import static org.junit.Assert.assertNotSame;20import static org.junit.Assert.assertNull;21import static org.junit.Assert.assertSame;22import static org.junit.Assert.assertThat;23import static org.junit.Assert.assertTrue;24/​**25 * Created by Ravindra Kumar on 16/​09/​16.26 */​27public class AssertTests {28 @Test29 public void testAssertArrayEquals() {30 byte[] expected = "trial".getBytes();31 byte[] actual = "trial".getBytes();32 assertArrayEquals("failure - byte arrays not same", expected, actual);33 }34 @Test35 public void testAssertEquals() {36 assertEquals("failure - strings are not equal", "text", "text");37 }38 @Test39 public void testAssertFalse() {40 assertFalse("failure - should be false", false);41 }42 @Test43 public void testAssertNotNull() {44 assertNotNull("should not be null", new Object());45 }46 @Test47 public void testAssertNotSame() {48 assertNotSame("should not be same Object", new Object(), new Object());49 }50 @Test51 public void testAssertNull() {52 assertNull("should be null", null);53 }54 @Test55 public void testAssertSame() {56 Integer aNumber = 768;57 assertSame("should be same", aNumber, aNumber);58 }59 /​/​ JUnit Matchers assertThat60 @Test61 public void testAssertThatBothContainsString() {62 assertThat("albumen", both(containsString("a")).and(containsString("b")));63 }64 @Test65 public void testAssertThatHasItems() {66 assertThat(Arrays.asList("one", "two", "three"), hasItems("one", "three"));67 }68 @Test69 public void testAssertThatEveryItemContainsString() {70 assertThat(Arrays.asList("fun", "ban", "net"), everyItem(containsString("n")));71 }72 /​/​ Core Hamcrest Matchers with assertThat73 @Test74 public void testAssertThatHamcrestCoreMatchers() {75 assertThat("good", allOf(equalTo("good"), startsWith("good")));76 assertThat("good", not(allOf(equalTo("bad"), equalTo("good"))));77 assertThat("good", anyOf(equalTo("bad"), equalTo("good")));78 assertThat(7, not(CombinableMatcher.either(equalTo(3)).or(equalTo(4))));79 assertThat(new Object(), not(sameInstance(new Object())));80 }81 @Test82 public void testAssertTrue() {83 assertTrue("failure - should be true", true);84 }85}...

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1package edu.nyu.oop;2import static org.hamcrest.CoreMatchers.allOf;3import static org.hamcrest.CoreMatchers.anyOf;4import static org.hamcrest.CoreMatchers.equalTo;5import static org.hamcrest.CoreMatchers.not;6import static org.hamcrest.CoreMatchers.sameInstance;7import static org.hamcrest.CoreMatchers.startsWith;8import static org.junit.Assert.assertThat;9import static org.hamcrest.CoreMatchers.both;10import static org.hamcrest.CoreMatchers.containsString;11import static org.hamcrest.CoreMatchers.everyItem;12import static org.hamcrest.CoreMatchers.hasItems;13import java.util.Arrays;14import org.hamcrest.core.CombinableMatcher;15import org.junit.Test;16public class ExampleJunitAssertions {17 @Test18 public void testAssertArrayEquals() {19 byte[] expected = "trial".getBytes();20 byte[] actual = "trial".getBytes();21 org.junit.Assert.assertArrayEquals("failure - byte arrays not same", expected, actual);22 }23 @Test24 public void testAssertEquals() {25 org.junit.Assert.assertEquals("failure - strings are not equal", "text", "text");26 }27 @Test28 public void testAssertFalse() {29 org.junit.Assert.assertFalse("failure - should be false", false);30 }31 @Test32 public void testAssertNotNull() {33 org.junit.Assert.assertNotNull("should not be null", new Object());34 }35 @Test36 public void testAssertNotSame() {37 org.junit.Assert.assertNotSame("should not be same Object", new Object(), new Object());38 }39 @Test40 public void testAssertNull() {41 org.junit.Assert.assertNull("should be null", null);42 }43 @Test44 public void testAssertSame() {45 Integer aNumber = 768;46 org.junit.Assert.assertSame("should be same", aNumber, aNumber);47 }48 /​/​ JUnit Matchers assertThat49 @Test50 public void testAssertThatBothContainsString() {51 org.junit.Assert.assertThat("albumen", both(containsString("a")).and(containsString("b")));52 }53 @Test54 public void testAssertThathasItemsContainsString() {55 org.junit.Assert.assertThat(Arrays.asList("one", "two", "three"), hasItems("one", "three"));56 }57 @Test58 public void testAssertThatEveryItemContainsString() {59 org.junit.Assert.assertThat(Arrays.asList("fun", "ban", "net"), everyItem(containsString("n")));60 }61 @Test62 public void testAssertThatHamcrestCoreMatchers() {63 assertThat("good", allOf(equalTo("good"), startsWith("good")));64 assertThat("good", not(allOf(equalTo("bad"), equalTo("good"))));65 assertThat("good", anyOf(equalTo("bad"), equalTo("good")));66 assertThat(7, not(CombinableMatcher.<Integer> either(equalTo(3)).or(equalTo(4))));67 assertThat(new Object(), not(sameInstance(new Object())));68 }69 @Test70 public void testAssertTrue() {71 org.junit.Assert.assertTrue("failure - should be true", true);72 }73}...

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1package com.packtpub.junit.recap;2import static org.hamcrest.CoreMatchers.allOf;3import static org.hamcrest.CoreMatchers.anyOf;4import static org.hamcrest.CoreMatchers.both;5import static org.hamcrest.CoreMatchers.containsString;6import static org.hamcrest.CoreMatchers.either;7import static org.hamcrest.CoreMatchers.endsWith;8import static org.hamcrest.CoreMatchers.equalTo;9import static org.hamcrest.CoreMatchers.hasItem;10import static org.hamcrest.CoreMatchers.hasItems;11import static org.hamcrest.CoreMatchers.is;12import static org.hamcrest.CoreMatchers.not;13import static org.hamcrest.CoreMatchers.startsWith;14import static org.hamcrest.MatcherAssert.assertThat;15import static com.packtpub.junit.recap.LessThanOrEqual.lessThanOrEqual;16import java.util.Arrays;17import java.util.List;18import org.junit.Test;;19public class AssertThatTest {20 @Test21 public void verifyMatcherValues() {22 int age = 30;23 assertThat(age, equalTo(30));24 assertThat(age, is(30));25 assertThat(age, not(equalTo(33)));26 assertThat(age, is(not(33)));27 }...

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1package com.airhacks;2import java.util.Arrays;3import java.util.List;4import static org.hamcrest.CoreMatchers.allOf;5import static org.hamcrest.CoreMatchers.anyOf;6import static org.hamcrest.CoreMatchers.both;7import static org.hamcrest.CoreMatchers.containsString;8import static org.hamcrest.CoreMatchers.either;9import static org.hamcrest.CoreMatchers.everyItem;10import static org.hamcrest.CoreMatchers.hasItem;11import static org.hamcrest.CoreMatchers.hasItems;12import static org.hamcrest.CoreMatchers.not;13import org.hamcrest.CustomMatcher;14import org.hamcrest.Matcher;15import static org.junit.Assert.assertThat;16import org.junit.Before;17import org.junit.Test;18/​**19 *20 * @author airhacks.com21 */​22public class AssertionsShowTest {23 private List<String> stringList;24 @Before25 public void init() {26 this.stringList = Arrays.asList("java", "javaee", "joker");...

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1package de.rieckpil.learning;23import static org.hamcrest.CoreMatchers.both;4import static org.hamcrest.CoreMatchers.containsString;5import static org.hamcrest.CoreMatchers.either;6import static org.hamcrest.CoreMatchers.everyItem;7import static org.hamcrest.CoreMatchers.hasItem;8import static org.hamcrest.CoreMatchers.hasItems;9import static org.hamcrest.CoreMatchers.is;10import static org.junit.Assert.assertThat;1112import java.util.Arrays;13import java.util.List;1415import org.hamcrest.CustomMatcher;16import org.hamcrest.Matcher;17import org.junit.Ignore;18import org.junit.Rule;19import org.junit.Test;20import org.junit.rules.Timeout;2122public class SampleTest {23 ...

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CoreMatchers

Using AI Code Generation

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1import static org.hamcrest.CoreMatchers.*;2import static org.junit.Assert.*;3import org.junit.Test;4import org.junit.runner.RunWith;5import org.junit.runners.Parameterized;6import org.junit.runners.Parameterized.Parameters;7import java.util.Arrays;8import java.util.Collection;9@RunWith(Parameterized.class)10public class TestParameterized {11 private int number;12 private boolean expected;13 public TestParameterized(int number, boolean expected) {14 this.number = number;15 this.expected = expected;16 }17 public static Collection<Object[]> data() {18 Object[][] data = new Object[][] { { 2, true }, { 6, true }, { 19, false }, { 22, true }, { 23, false } };19 return Arrays.asList(data);20 }21 public void testPrimeNumberChecker() {22 System.out.println("Parameterized Number is : " + number);23 assertEquals(expected, PrimeNumberChecker.validate(number));24 }25}

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CoreMatchers

Using AI Code Generation

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1import static org.hamcrest.CoreMatchers.*;2import static org.hamcrest.MatcherAssert.assertThat;3import java.util.List;4import java.util.ArrayList;5import org.junit.Test;6public class HamcrestExample {7 public void testAssertThat() {8 List<String> list = new ArrayList<String>();9 list.add("element1");10 list.add("element2");11 list.add("element3");12 assertThat(list, hasItem("element1"));13 assertThat(list, hasItems("element1", "element2"));14 assertThat(list, allOf(hasItem("element1"), hasItem("element2"), not(hasItem("element4"))));15 }16}17Example 1: assertThat method with is() matcher18import static org.hamcrest.CoreMatchers.is;19import static org.hamcrest.MatcherAssert.assertThat;20import org.junit.Test;21public class HamcrestExample {22 public void testAssertThatWithIs() {23 assertThat(1 + 1, is(2));24 }25}26Example 2: assertThat method with equalTo() matcher27import static org.hamcrest.CoreMatchers.equalTo;28import static org.hamcrest.MatcherAssert.assertThat;29import org.junit.Test;30public class HamcrestExample {31 public void testAssertThatWithEqualTo() {32 assertThat(1 + 1, equalTo(2));33 }34}35Example 3: assertThat method with not() matcher36import static org.hamcrest.CoreMatchers.*;37import static org.hamcrest.MatcherAssert.assertThat;38import org.junit.Test;39public class HamcrestExample {40 public void testAssertThatWithNot() {41 assertThat(1 +

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CoreMatchers

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1import static org.hamcrest.CoreMatchers.*;2import org.hamcrest.MatcherAssert;3import org.hamcrest.Matchers;4import org.junit.Test;5public class HamcrestCoreMatchersTest {6 public void testCoreMatchers() {7 MatcherAssert.assertThat(1, is(1));8 MatcherAssert.assertThat(1, is(not(2)));9 MatcherAssert.assertThat(1, equalTo(1));10 MatcherAssert.assertThat(1, equalTo(2));11 MatcherAssert.assertThat(1, is(equalTo(1)));12 MatcherAssert.assertThat(1, is(equalTo(2)));13 MatcherAssert.assertThat(1, is(not(equalTo(2))));14 MatcherAssert.assertThat(1, not(equalTo(2)));15 MatcherAssert.assertThat(1, not(is(equalTo(2))));16 MatcherAssert.assertThat(1, is(not(equalTo(2))));17 MatcherAssert.assertThat(1, is(not(is(equalTo(2)))));18 MatcherAssert.assertThat(1, is(Matchers.equalTo(1)));19 MatcherAssert.assertThat(1, is(Matchers.equalTo(2)));20 MatcherAssert.assertThat(1, is(Matchers.not(Matchers.equalTo(2))));21 MatcherAssert.assertThat(1, is(Matchers.not(Matchers.is(Matchers.equalTo(2)))));22 MatcherAssert.assertThat(1, is(Matchers.not(Matchers.is(Matchers.is(Matchers.equalTo(2))))));23 MatcherAssert.assertThat(1, is(Matchers.not(Matchers.is(Matchers.is(Matchers.is(Matchers.equalTo(2)))))));24 MatcherAssert.assertThat(1, is(Matchers.not(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.equalTo(2))))))));25 MatcherAssert.assertThat(1, is(Matchers.not(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.equalTo(2)))))))));26 MatcherAssert.assertThat(1, is(Matchers.not(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.equalTo(2))))))))));27 MatcherAssert.assertThat(1, is(Matchers.not(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.is(Matchers.equalTo(2)))))))))));

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There's actually an alternative to the @Test(expected=Xyz.class) in JUnit 4.7 using Rule and ExpectedException

In your test case you declare an ExpectedException annotated with @Rule, and assign it a default value of ExpectedException.none(). Then in your test that expects an exception you replace the value with the actual expected value. The advantage of this is that without using the ugly try/catch method, you can further specify what the message within the exception was

@Rule public ExpectedException thrown= ExpectedException.none();

@Test
public void myTest() {
    thrown.expect( Exception.class );
    thrown.expectMessage("Init Gold must be >= 0");

    rodgers = new Pirate("Dread Pirate Rodgers" , -100);
}

Using this method, you might be able to test for the message in the generic exception to be something specific.

ADDITION Another advantage of using ExpectedException is that you can more precisely scope the exception within the context of the test case. If you are only using @Test(expected=Xyz.class) annotation on the test, then the Xyz exception can be thrown anywhere in the test code -- including any test setup or pre-asserts within the test method. This can lead to a false positive.

Using ExpectedException, you can defer specifying the thrown.expect(Xyz.class) until after any setup and pre-asserts, just prior to actually invoking the method under test. Thus, you more accurately scope the exception to be thrown by the actual method invocation rather than any of the test fixture itself.

JUnit 5 NOTE:

JUnit 5 JUnit Jupiter has removed @Test(expected=...), @Rule and ExpectedException altogether. They are replaced with the new assertThrows(), which requires the use of Java 8 and lambda syntax. ExpectedException is still available for use in JUnit 5 through JUnit Vintage. Also JUnit Jupiter will also continue to support JUnit 4 ExpectedException through use of the junit-jupiter-migrationsupport module, but only if you add an additional class-level annotation of @EnableRuleMigrationSupport.

https://stackoverflow.com/questions/16723715/junit-4-expected-exception-type

Blogs

Check out the latest blogs from LambdaTest on this topic:

NUnit Tutorial: Parameterized Tests With Examples

This article is a part of our Content Hub. For more in-depth resources, check out our content hub on Selenium NUnit Tutorial.

How To Set Up Continuous Integration With Git and Jenkins?

There are various CI/CD tools such as CircleCI, TeamCity, Bamboo, Jenkins, GitLab, Travis CI, GoCD, etc., that help companies streamline their development process and ensure high-quality applications. If we talk about the top CI/CD tools in the market, Jenkins is still one of the most popular, stable, and widely used open-source CI/CD tools for building and automating continuous integration, delivery, and deployment pipelines smoothly and effortlessly.

pytest Report Generation For Selenium Automation Scripts

This article is a part of our Content Hub. For more in-depth resources, check out our content hub on Selenium pytest Tutorial.

The Most Detailed Selenium PHP Guide (With Examples)

The Selenium automation framework supports many programming languages such as Python, PHP, Perl, Java, C#, and Ruby. But if you are looking for a server-side programming language for automation testing, Selenium WebDriver with PHP is the ideal combination.

Maven Tutorial for Selenium

While working on a project for test automation, you’d require all the Selenium dependencies associated with it. Usually these dependencies are downloaded and upgraded manually throughout the project lifecycle, but as the project gets bigger, managing dependencies can be quite challenging. This is why you need build automation tools such as Maven to handle them automatically.

JUnit Tutorial:

LambdaTest also has a detailed JUnit tutorial explaining its features, importance, advanced use cases, best practices, and more to help you get started with running your automation testing scripts.

JUnit Tutorial Chapters:

Here are the detailed JUnit testing chapters to help you get started:

  • Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
  • Top Java Unit testing frameworks - Here are the upcoming JUnit automation testing frameworks that you can use in 2023 to boost your unit testing.
  • What is the JUnit framework
  • Why is JUnit testing important - Learn the importance and numerous benefits of using the JUnit testing framework.
  • Features of JUnit - Learn about the numerous features of JUnit and why developers prefer it.
  • JUnit 5 vs. JUnit 4: Differences - Here is a complete comparison between JUnit 5 and JUnit 4 testing frameworks.
  • Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
  • Getting started with JUnit testing - After successfully setting up your JUnit environment, this chapter will help you get started with JUnit testing in no time.
  • Parallel testing with JUnit - Parallel Testing can be used to reduce test execution time and improve test efficiency. Learn how to perform parallel testing with JUnit.
  • Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
  • Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
  • Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
  • Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
  • Best practices for JUnit testing - Learn about the best practices, such as always testing key methods and classes, integrating JUnit tests with your build, and more to get the best possible results.
  • Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.

JUnit Certification:

You can also check out our JUnit certification if you wish to take your career in Selenium automation testing with JUnit to the next level.

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