Best junit code snippet using org.hamcrest.core.IsNull.nullValue
Source: HamcrestNullAssertions.java
...4import static org.hamcrest.MatcherAssert.assertThat;5class HamcrestNullAssertions {6 @Nested7 class Null {8 private final Object nullValue = null;9 @Test10 void test_nullValue() {11 assertThat(nullValue, org.hamcrest.CoreMatchers.nullValue());12 assertThat(nullValue, org.hamcrest.CoreMatchers.nullValue(Object.class));13 assertThat(nullValue, org.hamcrest.core.IsNull.nullValue());14 assertThat(nullValue, org.hamcrest.core.IsNull.nullValue(Object.class));15 assertThat(nullValue, org.hamcrest.Matchers.nullValue());16 assertThat(nullValue, org.hamcrest.Matchers.nullValue(Object.class));17 }18 @Test19 void test_nullValue_with_reason() {20 assertThat("reason", nullValue, org.hamcrest.CoreMatchers.nullValue());21 assertThat("reason", nullValue, org.hamcrest.CoreMatchers.nullValue(Object.class));22 assertThat("reason", nullValue, org.hamcrest.core.IsNull.nullValue());23 assertThat("reason", nullValue, org.hamcrest.core.IsNull.nullValue(Object.class));24 assertThat("reason", nullValue, org.hamcrest.Matchers.nullValue());25 assertThat("reason", nullValue, org.hamcrest.Matchers.nullValue(Object.class));26 }27 @Test28 void test_isNullValue() {29 assertThat(nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.CoreMatchers.nullValue()));30 assertThat(nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.CoreMatchers.nullValue(Object.class)));31 assertThat(nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.core.IsNull.nullValue()));32 assertThat(nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.core.IsNull.nullValue(Object.class)));33 assertThat(nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.Matchers.nullValue()));34 assertThat(nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.Matchers.nullValue(Object.class)));35 assertThat(nullValue, org.hamcrest.core.Is.is(org.hamcrest.CoreMatchers.nullValue()));36 assertThat(nullValue, org.hamcrest.core.Is.is(org.hamcrest.CoreMatchers.nullValue(Object.class)));37 assertThat(nullValue, org.hamcrest.core.Is.is(org.hamcrest.core.IsNull.nullValue()));38 assertThat(nullValue, org.hamcrest.core.Is.is(org.hamcrest.core.IsNull.nullValue(Object.class)));39 assertThat(nullValue, org.hamcrest.core.Is.is(org.hamcrest.Matchers.nullValue()));40 assertThat(nullValue, org.hamcrest.core.Is.is(org.hamcrest.Matchers.nullValue(Object.class)));41 assertThat(nullValue, org.hamcrest.Matchers.is(org.hamcrest.CoreMatchers.nullValue()));42 assertThat(nullValue, org.hamcrest.Matchers.is(org.hamcrest.CoreMatchers.nullValue(Object.class)));43 assertThat(nullValue, org.hamcrest.Matchers.is(org.hamcrest.core.IsNull.nullValue()));44 assertThat(nullValue, org.hamcrest.Matchers.is(org.hamcrest.core.IsNull.nullValue(Object.class)));45 assertThat(nullValue, org.hamcrest.Matchers.is(org.hamcrest.Matchers.nullValue()));46 assertThat(nullValue, org.hamcrest.Matchers.is(org.hamcrest.Matchers.nullValue(Object.class)));47 }48 @Test49 void test_isNullValue_with_reason() {50 assertThat("reason", nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.CoreMatchers.nullValue()));51 assertThat("reason", nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.CoreMatchers.nullValue(Object.class)));52 assertThat("reason", nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.core.IsNull.nullValue()));53 assertThat("reason", nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.core.IsNull.nullValue(Object.class)));54 assertThat("reason", nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.Matchers.nullValue()));55 assertThat("reason", nullValue, org.hamcrest.CoreMatchers.is(org.hamcrest.Matchers.nullValue(Object.class)));56 assertThat("reason", nullValue, org.hamcrest.core.Is.is(org.hamcrest.CoreMatchers.nullValue()));57 assertThat("reason", nullValue, org.hamcrest.core.Is.is(org.hamcrest.CoreMatchers.nullValue(Object.class)));58 assertThat("reason", nullValue, org.hamcrest.core.Is.is(org.hamcrest.core.IsNull.nullValue()));59 assertThat("reason", nullValue, org.hamcrest.core.Is.is(org.hamcrest.core.IsNull.nullValue(Object.class)));60 assertThat("reason", nullValue, org.hamcrest.core.Is.is(org.hamcrest.Matchers.nullValue()));61 assertThat("reason", nullValue, org.hamcrest.core.Is.is(org.hamcrest.Matchers.nullValue(Object.class)));62 assertThat("reason", nullValue, org.hamcrest.Matchers.is(org.hamcrest.CoreMatchers.nullValue()));63 assertThat("reason", nullValue, org.hamcrest.Matchers.is(org.hamcrest.CoreMatchers.nullValue(Object.class)));64 assertThat("reason", nullValue, org.hamcrest.Matchers.is(org.hamcrest.core.IsNull.nullValue()));65 assertThat("reason", nullValue, org.hamcrest.Matchers.is(org.hamcrest.core.IsNull.nullValue(Object.class)));66 assertThat("reason", nullValue, org.hamcrest.Matchers.is(org.hamcrest.Matchers.nullValue()));67 assertThat("reason", nullValue, org.hamcrest.Matchers.is(org.hamcrest.Matchers.nullValue(Object.class)));68 }69 }70 @Nested71 class NotNull {72 private final Object notNullValue = new Object();73 @Test74 void test_notNullValue() {75 assertThat(notNullValue, org.hamcrest.CoreMatchers.notNullValue());76 assertThat(notNullValue, org.hamcrest.CoreMatchers.notNullValue(Object.class));77 assertThat(notNullValue, org.hamcrest.core.IsNull.notNullValue());78 assertThat(notNullValue, org.hamcrest.core.IsNull.notNullValue(Object.class));79 assertThat(notNullValue, org.hamcrest.Matchers.notNullValue());80 assertThat(notNullValue, org.hamcrest.Matchers.notNullValue(Object.class));81 }...
Source: CoreMatchers.java
...98 }99 public static <T> Matcher<T> notNullValue(Class<T> type) {100 return IsNull.notNullValue(type);101 }102 public static Matcher<Object> nullValue() {103 return IsNull.nullValue();104 }105 public static <T> Matcher<T> nullValue(Class<T> type) {106 return IsNull.nullValue(type);107 }108 public static <T> Matcher<T> sameInstance(T target) {109 return IsSame.sameInstance(target);110 }111 public static <T> Matcher<T> theInstance(T target) {112 return IsSame.theInstance(target);113 }114 public static Matcher<String> containsString(String substring) {115 return StringContains.containsString(substring);116 }117 public static Matcher<String> containsStringIgnoringCase(String substring) {118 return StringContains.containsStringIgnoringCase(substring);119 }120 public static Matcher<String> startsWith(String prefix) {...
Source: IsNullTest.java
...3package org.hamcrest.core;4import static org.hamcrest.MatcherAssert.assertThat;5import static org.hamcrest.core.IsNot.not;6import static org.hamcrest.core.IsNull.notNullValue;7import static org.hamcrest.core.IsNull.nullValue;8import java.math.BigDecimal;9import org.hamcrest.AbstractMatcherTest;10import org.hamcrest.Matcher;11public class IsNullTest extends AbstractMatcherTest {12 private static final BigDecimal ANY_NON_NULL_ARGUMENT = new BigDecimal(66);13 @Override14 protected Matcher<?> createMatcher() {15 return nullValue();16 }17 public void testEvaluatesToTrueIfArgumentIsNull() {18 assertThat(null, nullValue());19 assertThat(ANY_NON_NULL_ARGUMENT, not(nullValue()));20 assertThat(ANY_NON_NULL_ARGUMENT, notNullValue());21 assertThat(null, not(notNullValue()));22 }23 public void testSupportsStaticTyping() {24 requiresStringMatcher(nullValue(String.class));25 requiresStringMatcher(notNullValue(String.class));26 }27 private void requiresStringMatcher(@SuppressWarnings("unused") Matcher<String> arg) {28 // no-op29 } 30}...
nullValue
Using AI Code Generation
1assertThat(null, is(nullValue()));2assertThat("not null", is(notNullValue()));3assertThat(null, is(nullValue()));4assertThat("not null", is(notNullValue()));5assertThat(null, is(nullValue()));6assertThat("not null", is(notNullValue()));7assertThat(null, is(nullValue()));8assertThat("not null", is(notNullValue()));9assertThat(null, is(nullValue()));10assertThat("not null", is(notNullValue()));11assertThat(null, is(nullValue()));12assertThat("not null", is(notNullValue()));13assertThat(null, is(nullValue()));14assertThat("not null", is(notNullValue()));15assertThat(null, is(nullValue()));16assertThat("not null", is(notNullValue()));17assertThat(null, is(nullValue()));18assertThat("not null", is(notNullValue()));19assertThat(null, is(nullValue()));20assertThat("not null", is(notNullValue()));21assertThat(null, is(nullValue()));
nullValue
Using AI Code Generation
1assertThat(null, nullValue());2assertThat("not null", notNullValue());3import static org.hamcrest.core.IsNull.nullValue;4import static org.hamcrest.core.IsNull.notNullValue;5import static org.hamcrest.MatcherAssert.assertThat;6import org.junit.Test;7public class IsNullTest {8 public void testIsNull() {9 assertThat(null, nullValue());10 }11 public void testIsNotNull() {12 assertThat("not null", notNullValue());13 }14}15 at org.junit.Assert.assertEquals(Assert.java:115)16 at org.junit.Assert.assertEquals(Assert.java:144)17 at com.journaldev.junit.hamcrest.IsNullTest.testIsNull(IsNullTest.java:17)18 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)19 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)20 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)21 at java.lang.reflect.Method.invoke(Method.java:606)22 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)23 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)24 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)25 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)26 at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)27 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)28 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)29 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)30 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)31 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)32 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)33 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)34 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)35 at org.junit.runners.ParentRunner.run(ParentRunner.java:292)36 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(J
nullValue
Using AI Code Generation
1assertThat(1, is(nullValue()));2assertThat(null, is(nullValue()));3assertThat(1, is(nullValue()));4assertThat(null, is(nullValue()));5assertThat(1, is(notNullValue()));6assertThat(null, is(notNullValue()));7assertThat(1, is(notNullValue()));8assertThat(null, is(notNullValue()));9assertThat(1, is(not(2)));10assertThat(null, is(not(1)));11assertThat(1, is(not(2)));12assertThat(null, is(not(1)));13assertThat("Hello World", allOf(startsWith("Hello"), endsWith("World")));14assertThat("Hello World", allOf(startsWith("Hello"), endsWith("World")));15assertThat("Hello World", containsString("Hello"));16assertThat("Hello World", containsString("Hello"));17assertThat("Hello World", containsString("Hello"));18assertThat("Hello World", containsString("Hello"));19assertThat("Hello World", containsString("Hello
nullValue
Using AI Code Generation
1assertThat(null, is(nullValue()))2assertThat("test", is(equalTo("test")))3assertThat("test", is("test"))4assertThat("test", isA(String.class))5assertThat("test", anything())6assertThat("test", anything("test"))7assertThat("test", anything(String.class))8assertThat("test", anything(String.class, "test"))9assertThat("test", anything(String.class, "test", "test"))10assertThat(null, is(nullValue()))11assertThat("test", is(equalTo("test")))12assertThat("test", is("test"))13assertThat("test", isA(String.class))14assertThat("test", anything())15assertThat("test", anything("test"))16assertThat("test", anything(String.class))17assertThat("test", anything(String.class, "test"))18assertThat("test", anything(String.class, "test", "test"))
nullValue
Using AI Code Generation
1assertThat(“”, nullValue());2assertThat(null, nullValue());3assertThat(“”, not(nullValue()));4assertThat(null, not(nullValue()));5assertThat(“”, notNullValue());6assertThat(null, notNullValue());7assertThat(“”, not(notNullValue()));8assertThat(null, not(notNullValue()));9assertThat(“”, not(not(notNullValue())));10assertThat(null, not(not(notNullValue())));11assertThat(“”, nullValue());12assertThat(null, nullValue());13assertThat(“”, not(nullValue()));14assertThat(null, not(nullValue()));15assertThat(“”, notNullValue());16assertThat(null, notNullValue());17assertThat(“”, not(notNullValue()));18assertThat(null, not(notNullValue()));19assertThat(“”, not(not(notNullValue())));20assertThat(null, not(not(notNullValue())));21assertThat(“”, nullValue());22assertThat(null, nullValue());23assertThat(“”, not(nullValue()));24assertThat(null, not(nullValue()));25assertThat(“”, notNullValue());26assertThat(null, notNullValue());27assertThat(“”, not(notNullValue()));28assertThat(null, not(notNullValue()));29assertThat(“”, not(not(notNullValue())));30assertThat(null, not(not(notNullValue())));31assertThat(“”, nullValue());32assertThat(null, nullValue());33assertThat(“”, not(nullValue()));34assertThat(null, not(nullValue()));35assertThat(“”, notNullValue());36assertThat(null, notNullValue());37assertThat(“”, not(notNullValue()));38assertThat(null, not(notNullValue()));39assertThat(“”, not(not(notNullValue())));40assertThat(null, not(not(notNullValue())));41assertThat(“”, nullValue());42assertThat(null, nullValue());43assertThat(
nullValue
Using AI Code Generation
1import static org.hamcrest.core.IsNull.nullValue;2import static org.hamcrest.MatcherAssert.assertThat;3import org.junit.Test;4public class IsNullExample {5public void testIsNull() {6assertThat("abc",nullValue());7}8}9Let’s see another example of isNull() method of IsNull class:10Example 2: Using isNull() method of IsNull class11package com.journaldev.junit.hamcrest;12import static org.hamcrest.core.IsNull.nullValue;13import static org.hamcrest.MatcherAssert.assertThat;14import org.junit.Test;15public class IsNullExample2 {16public void testIsNull() {17assertThat(null,nullValue());18}19}20Let’s see another example of isNull() method of IsNull class:21Example 3: Using isNull() method of IsNull class22package com.journaldev.junit.hamcrest;23import static org.hamcrest.core.IsNull.nullValue;24import static org.hamcrest.MatcherAssert.assertThat;25import org.junit.Test;26public class IsNullExample3 {27public void testIsNull() {28assertThat(nullValue(),nullValue());29}30}31Let’s see another example of isNull() method of IsNull class:32Example 4: Using isNull() method of IsNull class33package com.journaldev.junit.hamcrest;34import static org.hamcrest.core.IsNull.nullValue;35import static org.hamcrest.MatcherAssert.assertThat;36import org.junit.Test;37public class IsNullExample4 {38public void testIsNull() {39assertThat(nullValue(),null);40}41}42Let’s see another example of isNull() method of IsNull class:43Example 5: Using isNull() method of IsNull class44package com.journaldev.junit.hamcrest;45import static org.hamcrest.core.IsNull.nullValue;46import static org.hamcrest.MatcherAssert.assertThat;47import org.junit.Test;48public class IsNullExample5 {49public void testIsNull() {50assertThat(null,null);51}52}
nullValue
Using AI Code Generation
1assertThat(null, is(nullValue()));2assertThat(null, nullValue());3assertThat("Hello", is(notNullValue()));4assertThat("Hello", notNullValue());5assertThat("Hello", is(sameInstance("Hello")));6assertThat("Hello", sameInstance("Hello"));7assertThat("Hello", is(not("Hi")));8assertThat("Hello", not("Hi"));9assertThat("Hello", is(equalTo("Hello")));10assertThat("Hello", equalTo("Hello"));11assertThat("Hello", is(equalToIgnoringCase("hello")));12assertThat("Hello", equalToIgnoringCase("hello"));13assertThat("Hello", is(equalToIgnoringWhiteSpace("Hello ")));
nullValue
Using AI Code Generation
1assertThat(null, nullValue());2assertThat("not null", nullValue());3assertThat(null, notNullValue());4assertThat("not null", notNullValue());5assertThat("not null", not(nullValue()));6assertThat(null, not(nullValue()));7assertThat(null, is(nullValue()));8assertThat("not null", is(nullValue()));9assertThat("not null", is(notNullValue()));10assertThat(null, is(notNullValue()));11assertThat(null, is(not(nullValue())));12assertThat("not null", is(not(nullValue())));13assertThat("not null", is(not(nullValue())));14assertThat(null, is(not(nullValue())));15assertThat(null, is(not(nullValue())));16assertThat("not null", is(not(nullValue())));17assertThat("not null", is(not(nullValue())));18assertThat(null, is(not(nullValue())));19assertThat(null, is(not(nullValue())));20assertThat("not null", is(not(nullValue())));21assertThat("not null", is(not(nullValue())));22assertThat(null, is(not(nullValue())));23assertThat(null, is(not(nullValue())));24assertThat("not null", is(not(nullValue())));25assertThat("not null", is(not(nullValue())));
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If you add in Hamcrest and JUnit4, you could do:
String x = "foo bar";
Assert.assertThat(x, CoreMatchers.containsString("foo"));
With some static imports, it looks a lot better:
assertThat(x, containsString("foo"));
The static imports needed would be:
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.CoreMatchers.containsString;
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