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How to use nullValue method of org.hamcrest.CoreMatchers class

Best junit code snippet using org.hamcrest.CoreMatchers.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:InProcessRunnerTest.java

...5import java.util.Arrays;6import java.util.Collections;7import static org.hamcrest.CoreMatchers.instanceOf;8import static org.hamcrest.CoreMatchers.is;9import static org.hamcrest.CoreMatchers.nullValue;10import static org.hamcrest.CoreMatchers.sameInstance;11import static org.hamcrest.collection.IsArrayContainingInOrder.arrayContaining;12import static org.junit.Assert.assertThat;13/**14 * @author Jonathan Knight15 */16public class InProcessRunnerTest {17    @Before18    public void clearProcessRunnableStub() {19        ProcessRunnableStub.argsUsed = null;20        ProcessRunnableStub.methodsCalled.clear();21        ProcessRunnableStub.result = null;22    }23    @Test24    public void shouldCallStaticMethod() throws Exception {25        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();26        String className = ProcessRunnableStub.class.getCanonicalName();27        String methodName = ProcessRunnableStub.METHOD_STATIC_START;28        Object result = new Object();29        String[] args = new String[]{"1", "2"};30        InProcessRunner runner = new InProcessRunner("Test", classLoader, className, methodName, args);31        ProcessRunnableStub.methodsCalled.clear();32        ProcessRunnableStub.result = result;33        runner.run();34        assertThat(ProcessRunnableStub.methodsCalled, is(Collections.singletonList(methodName)));35        assertThat(runner.isFinished(), is(true));36        assertThat(runner.<Object>getResult(), sameInstance(result));37        assertThat(runner.getInstance(), CoreMatchers.<Object>nullValue());38        assertThat(runner.getError(), CoreMatchers.<Throwable>nullValue());39        assertThat(ProcessRunnableStub.argsUsed, is(arrayContaining("1", "2")));40    }41    @Test42    public void shouldCallStaticNoArgsMethod() throws Exception {43        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();44        String className = ProcessRunnableStub.class.getCanonicalName();45        String methodName = ProcessRunnableStub.METHOD_STATIC_START_NO_ARGS;46        Object result = new Object();47        String[] args = new String[]{"1", "2"};48        InProcessRunner runner = new InProcessRunner("Test", classLoader, className, methodName, args);49        ProcessRunnableStub.methodsCalled.clear();50        ProcessRunnableStub.result = result;51        runner.run();52        assertThat(ProcessRunnableStub.methodsCalled, is(Collections.singletonList(methodName)));53        assertThat(runner.isFinished(), is(true));54        assertThat(runner.<Object>getResult(), sameInstance(result));55        assertThat(runner.getInstance(), CoreMatchers.<Object>nullValue());56        assertThat(runner.getError(), CoreMatchers.<Throwable>nullValue());57        assertThat(ProcessRunnableStub.argsUsed, is(nullValue()));58    }59    @Test60    public void shouldCallNonStaticMethod() throws Exception {61        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();62        String className = ProcessRunnableStub.class.getCanonicalName();63        String methodName = ProcessRunnableStub.METHOD_START;64        Object result = new Object();65        String[] args = new String[]{"3", "4"};66        InProcessRunner runner = new InProcessRunner("Test", classLoader, className, methodName, args);67        ProcessRunnableStub.methodsCalled.clear();68        ProcessRunnableStub.result = result;69        runner.run();70        assertThat(ProcessRunnableStub.methodsCalled, is(Collections.singletonList(methodName)));71        assertThat(runner.<Object>getResult(), sameInstance(result));72        assertThat(runner.getInstance(), instanceOf(ProcessRunnableStub.class));73        assertThat(runner.getError(), CoreMatchers.<Throwable>nullValue());74        assertThat(ProcessRunnableStub.argsUsed, is(arrayContaining("3", "4")));75    }76    @Test77    public void shouldCallNonStaticNoArgsMethod() throws Exception {78        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();79        String className = ProcessRunnableStub.class.getCanonicalName();80        String methodName = ProcessRunnableStub.METHOD_START_NO_ARGS;81        Object result = new Object();82        String[] args = new String[]{"3", "4"};83        InProcessRunner runner = new InProcessRunner("Test", classLoader, className, methodName, args);84        ProcessRunnableStub.methodsCalled.clear();85        ProcessRunnableStub.result = result;86        runner.run();87        assertThat(ProcessRunnableStub.methodsCalled, is(Collections.singletonList(methodName)));88        assertThat(runner.<Object>getResult(), sameInstance(result));89        assertThat(runner.getInstance(), instanceOf(ProcessRunnableStub.class));90        assertThat(runner.getError(), CoreMatchers.<Throwable>nullValue());91        assertThat(ProcessRunnableStub.argsUsed, is(nullValue()));92    }93    @Test94    public void shouldUseSpecifiedInstanceToCallNonStaticMethod() throws Exception {95        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();96        String className = ProcessRunnableStub.class.getCanonicalName();97        String methodName = ProcessRunnableStub.METHOD_START;98        Object result = new Object();99        String[] args = new String[]{"A", "B"};100        ProcessRunnableStub instance = new ProcessRunnableStub();101        ProcessRunnableStub.result = result;102        InProcessRunner runner = new InProcessRunner("Test", classLoader, className, methodName, args, instance);103        runner.run();104        assertThat(runner.<Object>getResult(), sameInstance(result));105        assertThat((ProcessRunnableStub)runner.getInstance(), sameInstance(instance));106        assertThat(runner.getError(), CoreMatchers.<Throwable>nullValue());107        assertThat(ProcessRunnableStub.methodsCalled, is(Arrays.asList(ProcessRunnableStub.METHOD_START)));108        assertThat(ProcessRunnableStub.argsUsed, is(arrayContaining("A", "B")));109    }110    @Test111    public void shouldSetErrorIfExceptionThrown() throws Exception {112        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();113        String className = "No_Such_Class";114        String methodName = "No_Such_Method";115        String[] args = new String[0];116        InProcessRunner runner = new InProcessRunner("Test", classLoader, className, methodName, args);117        runner.run();118        assertThat(runner.getError(), instanceOf(ClassNotFoundException.class));119    }120}...

Source:TestNamedElementChain.java

...27package org.apache.hc.core5.http.config;28import static org.hamcrest.MatcherAssert.assertThat;29import static org.hamcrest.Matchers.equalTo;30import static org.hamcrest.Matchers.notNullValue;31import static org.hamcrest.Matchers.nullValue;32import static org.hamcrest.CoreMatchers.is;33import org.hamcrest.CoreMatchers;34import org.junit.jupiter.api.Test;35/**36 * Tests for {@link NamedElementChain}.37 */38public class TestNamedElementChain {39    @Test40    public void testBasics() {41        final NamedElementChain<Character> list = new NamedElementChain<>();42        assertThat(list.getFirst(), CoreMatchers.nullValue());43        assertThat(list.getLast(), CoreMatchers.nullValue());44        final NamedElementChain<Character>.Node nodeA = list.addFirst('a', "a");45        assertThat(list.getFirst(), CoreMatchers.sameInstance(nodeA));46        assertThat(list.getLast(), CoreMatchers.sameInstance(nodeA));47        final NamedElementChain<Character>.Node nodeB = list.addLast('b', "b");48        assertThat(list.getFirst(), CoreMatchers.sameInstance(nodeA));49        assertThat(list.getLast(), CoreMatchers.sameInstance(nodeB));50        final NamedElementChain<Character>.Node nodeZ = list.addLast('z', "z");51        assertThat(list.getFirst(), CoreMatchers.sameInstance(nodeA));52        assertThat(list.getLast(), CoreMatchers.sameInstance(nodeZ));53        assertThat(nodeA.getPrevious(), CoreMatchers.nullValue());54        assertThat(nodeA.getNext(), CoreMatchers.sameInstance(nodeB));55        assertThat(nodeB.getPrevious(), CoreMatchers.sameInstance(nodeA));56        assertThat(nodeB.getNext(), CoreMatchers.sameInstance(nodeZ));57        assertThat(nodeZ.getPrevious(), CoreMatchers.sameInstance(nodeB));58        assertThat(nodeZ.getNext(), CoreMatchers.nullValue());59        final NamedElementChain<Character>.Node nodeD = list.addAfter("b", 'd', "d");60        assertThat(nodeD.getPrevious(), CoreMatchers.sameInstance(nodeB));61        assertThat(nodeD.getNext(), CoreMatchers.sameInstance(nodeZ));62        assertThat(nodeB.getNext(), CoreMatchers.sameInstance(nodeD));63        assertThat(nodeZ.getPrevious(), CoreMatchers.sameInstance(nodeD));64        final NamedElementChain<Character>.Node nodeC = list.addBefore("d", 'c', "c");65        assertThat(nodeC.getPrevious(), CoreMatchers.sameInstance(nodeB));66        assertThat(nodeC.getNext(), CoreMatchers.sameInstance(nodeD));67        assertThat(nodeB.getNext(), CoreMatchers.sameInstance(nodeC));68        assertThat(nodeD.getPrevious(), CoreMatchers.sameInstance(nodeC));69        assertThat(list.getSize(), CoreMatchers.equalTo(5));70        assertThat(list.remove("a"), CoreMatchers.is(true));71        assertThat(list.remove("z"), CoreMatchers.is(true));72        assertThat(list.remove("c"), CoreMatchers.is(true));73        assertThat(list.remove("c"), CoreMatchers.is(false));74        assertThat(list.remove("blah"), CoreMatchers.is(false));75        assertThat(list.getFirst(), CoreMatchers.sameInstance(nodeB));76        assertThat(list.getLast(), CoreMatchers.sameInstance(nodeD));77        assertThat(list.getSize(), CoreMatchers.equalTo(2));78        assertThat(list.addBefore("blah", 'e', "e"), CoreMatchers.nullValue());79        assertThat(list.getSize(), CoreMatchers.equalTo(2));80        assertThat(list.addAfter("yada", 'e', "e"), CoreMatchers.nullValue());81        assertThat(list.getSize(), CoreMatchers.equalTo(2));82    }83    @Test84    public void testFind() {85        final NamedElementChain<Character> list = new NamedElementChain<>();86        list.addLast('c', "c");87        assertThat(list.find("c"), notNullValue());88        assertThat(list.find("a"), nullValue());89    }90    @Test91    public void testReplace() {92        final NamedElementChain<Character> list = new NamedElementChain<>();93        list.addLast('c', "c");94        final boolean found = list.replace("c",'z' );95        assertThat(found, is(true));96        assertThat(list.find("c").getValue(), equalTo('z'));97        assertThat(list.find("c").getName(), equalTo("c"));98        final boolean notFound = list.replace("X",'z' );99        assertThat(notFound, is(false));100    }101}...

Source:AuthenticationCallbackMatcher.java

...35import static org.hamcrest.CoreMatchers.anyOf;36import static org.hamcrest.CoreMatchers.equalTo;37import static org.hamcrest.CoreMatchers.is;38import static org.hamcrest.CoreMatchers.notNullValue;39import static org.hamcrest.CoreMatchers.nullValue;40import static org.hamcrest.Matchers.isA;41public class AuthenticationCallbackMatcher extends BaseMatcher<MockLockCallback> {42    private final Matcher<Credentials> authenticationMatcher;43    private final Matcher<Boolean> canceledMatcher;44    private final Matcher<Throwable> errorMatcher;45    public AuthenticationCallbackMatcher(Matcher<Credentials> authenticationMatcher, Matcher<Boolean> canceledMatcher, Matcher<Throwable> errorMatcher) {46        this.authenticationMatcher = authenticationMatcher;47        this.canceledMatcher = canceledMatcher;48        this.errorMatcher = errorMatcher;49    }50    @Override51    public boolean matches(Object item) {52        MockLockCallback callback = (MockLockCallback) item;53        try {54            waitAtMost(Duration.ONE_SECOND).await().until(callback.authentication(), authenticationMatcher);55            waitAtMost(Duration.ONE_SECOND).await().until(callback.canceled(), canceledMatcher);56            waitAtMost(Duration.ONE_SECOND).await().until(callback.error(), errorMatcher);57            return true;58        } catch (ConditionTimeoutException e) {59            return false;60        }61    }62    @Override63    public void describeTo(Description description) {64        description65                .appendText("successful method be called");66    }67    public static AuthenticationCallbackMatcher isCanceled() {68        return new AuthenticationCallbackMatcher(is(nullValue(Credentials.class)), equalTo(true), is(nullValue(Throwable.class)));69    }70    public static AuthenticationCallbackMatcher hasAuthentication() {71        return new AuthenticationCallbackMatcher(is(notNullValue(Credentials.class)), equalTo(false), is(nullValue(Throwable.class)));72    }73    public static AuthenticationCallbackMatcher hasError() {74        return new AuthenticationCallbackMatcher(is(nullValue(Credentials.class)), equalTo(false), is(notNullValue(Throwable.class)));75    }76    public static AuthenticationCallbackMatcher hasNoError() {77        return new AuthenticationCallbackMatcher(anyOf(nullValue(Credentials.class), notNullValue(Credentials.class)), any(Boolean.class), is(nullValue(Throwable.class)));78    }79    public static <T> CallbackMatcher<T, AuthenticationException> hasPayloadOfType(Class<T> clazz) {80        return new CallbackMatcher<>(isA(clazz), Matchers.is(Matchers.nullValue(AuthenticationException.class)));81    }82    public static <T> CallbackMatcher<T, AuthenticationException> hasPayload(T payload) {83        return new CallbackMatcher<>(Matchers.equalTo(payload), Matchers.is(Matchers.nullValue(AuthenticationException.class)));84    }85    public static <T> CallbackMatcher<T, AuthenticationException> hasNoPayloadOfType(Class<T> clazz) {86        return new CallbackMatcher<>(Matchers.is(Matchers.nullValue(clazz)), Matchers.is(Matchers.notNullValue(AuthenticationException.class)));87    }88}...

Source:AssertThatTest.java

...16import static org.hamcrest.CoreMatchers.hasItems;17import static org.hamcrest.CoreMatchers.is;18import static org.hamcrest.CoreMatchers.isA;19import static org.hamcrest.CoreMatchers.not;20import static org.hamcrest.CoreMatchers.nullValue;21import static org.hamcrest.CoreMatchers.sameInstance;22import static org.hamcrest.CoreMatchers.startsWith;23import static org.hamcrest.CoreMatchers.theInstance;24import static org.junit.Assert.assertThat;25/**26 * Exploring assertThat assertion using Harmcrest matchers27 */28public class AssertThatTest {29    @Test30    public void testAssertThat() {31        String string = "String";32        assertThat(string, is("String")); // This assertions does the same33        assertThat(string, equalTo("String"));34        assertThat(string, is(equalTo("String")));35    }36    @Test37    public void testAssertThatChain() {38        String string = "String";39        assertThat(string, allOf(containsString("ing"), startsWith("S"), endsWith("g")));40        assertThat(string, anyOf(containsString("tr"), startsWith("A"), endsWith("g")));41        assertThat(string, not(allOf(containsString("tr"), startsWith("A"), endsWith("g"))));42        assertThat(string, both(startsWith("S")).and(endsWith("g")));43        assertThat(string, both(startsWith("S")).and(endsWith("s")).or(endsWith("g")));44        assertThat(string, either(startsWith("X")).or(startsWith("S")).or(endsWith("g")));45    }46    @Test47    public void testVerboseHamcrestMatcher() {48        String string = "S";49        // This assertion if fails return a better description as:50        // java.lang.AssertionError: Expected: a String that start with "S" but: was "Foo"51        assertThat(string, describedAs("a String that start with %0", startsWith("S"), "S"));52    }53    @Test54    public void testSimpleHamcrestMatcher() {55        // Creates a matcher that always matches, regardless of the examined object.56        assertThat(null, anything());57        assertThat(null, nullValue());58        assertThat(null, is(nullValue()));59        Object actual = new Object();60        Object expected = actual;61        assertThat(actual, isA(Object.class));62        assertThat(actual, sameInstance(expected));63        assertThat(actual, theInstance(expected));64        assertThat(actual, not(sameInstance(new Object())));65    }66    @Test67    public void testArrayHamcrestMatcher() {68        List<String> strings = Arrays.asList("String", "Strong", "Street");69        assertThat(strings, everyItem(isA(String.class)));70        assertThat(strings, everyItem(startsWith("S")));71        assertThat(strings, hasItem("Strong"));72        assertThat(strings, hasItem(is("Street")));...

Source:ListPreferenceTest.java

...9import org.junit.runner.RunWith;10import static org.hamcrest.CoreMatchers.equalTo;11import static org.hamcrest.CoreMatchers.instanceOf;12import static org.hamcrest.CoreMatchers.notNullValue;13import static org.hamcrest.CoreMatchers.nullValue;14import static org.hamcrest.CoreMatchers.sameInstance;15import static org.junit.Assert.assertThat;16@RunWith(WithTestDefaultsRunner.class)17public class ListPreferenceTest {18	private ListPreference listPreference;19	private ShadowListPreference shadow;20	@Before21	public void setUp() throws Exception {22		listPreference = new ListPreference(new Activity());23		shadow = Robolectric.shadowOf(listPreference);24    }25    26	@Test27	public void shouldInheritFromDialogPreference() {28		assertThat(shadow, instanceOf(ShadowDialogPreference.class));29	}	30	31	@Test32	public void shouldHaveEntries() {33		CharSequence[] entries = { "this", "is", "only", "a", "test" };34		35		assertThat(listPreference.getEntries(), nullValue());36		listPreference.setEntries(entries);37		assertThat(listPreference.getEntries(), sameInstance(entries));		38	}39	40	@Test41	public void shouldSetEntriesByResourceId() {42		assertThat(listPreference.getEntries(), nullValue());43		listPreference.setEntries(R.array.greetings);44		assertThat(listPreference.getEntries(), notNullValue());			45	}46	47	@Test48	public void shouldHaveEntryValues() {49		CharSequence[] entryValues = { "this", "is", "only", "a", "test" };50		51		assertThat(listPreference.getEntryValues(), nullValue());52		listPreference.setEntryValues(entryValues);53		assertThat(listPreference.getEntryValues(), sameInstance(entryValues));		54	}55	56	@Test57	public void shouldSetEntryValuesByResourceId() {58		assertThat(listPreference.getEntryValues(), nullValue());59		listPreference.setEntryValues(R.array.greetings);60		assertThat(listPreference.getEntryValues(), notNullValue());			61	}62	63	@Test64	public void shouldSetValue() {65		assertThat(listPreference.getValue(), nullValue());66		listPreference.setValue("testing");67		assertThat(listPreference.getValue(), equalTo("testing"));68	}69}...

Source:combinational_collection_assert.java

...5import static org.hamcrest.CoreMatchers.hasItem;6import static org.hamcrest.CoreMatchers.is;7import static org.hamcrest.CoreMatchers.not;8import static org.hamcrest.CoreMatchers.notNullValue;9import static org.hamcrest.CoreMatchers.nullValue;10import static org.hamcrest.CoreMatchers.startsWith;11import static org.junit.Assert.*;12import java.util.Arrays;13import java.util.Collection;14import java.util.HashSet;15import java.util.Set;16import org.junit.Test;17public class combinational_collection_assert {18	@Test19	public void a_StringMatchers() {  20		String tested="TEKSYSTEMS";21		String check ="EKS";22		assertThat("MATCHING",tested, anything(check));23	}24	@Test25	public void b_NullMatchers() {  26		String tested=null;27		assertThat(" Null MATCHING",tested,nullValue());28	}29	@Test30	public void c_NotNullMatchers() {  31		String tested="";32		assertThat(" Null MATCHING",tested,notNullValue());33	}34	@Test35	public void d_STRINGSameMatchers() {  36		String tested="jharna";37		String check="jharna";38		assertThat(" MATCHING",tested,is(check));39	}40	@Test41	public void e_STRINGNotSameMatchers() {  ...

Source:ClientTest.java

...7import org.junit.Before;8import org.junit.Test;9import static org.hamcrest.CoreMatchers.is;10import static org.hamcrest.CoreMatchers.not;11import static org.hamcrest.CoreMatchers.nullValue;12import static org.hamcrest.CoreMatchers.startsWith;13import static org.hamcrest.MatcherAssert.assertThat;14public class ClientTest {15    @Before16    public void setUp() {17        Factory.setOptions(Mini.CONFIG);18    }19    @Test20    public void testUpload() throws Exception {21        AlipayOfflineMaterialImageUploadResponse response = Base.Video().upload("æµè¯è§é¢",22                "src/test/resources/fixture/sample.mp4");23        assertThat(ResponseChecker.success(response), is(true));24        assertThat(response.code, is("10000"));25        assertThat(response.msg, is("Success"));26        assertThat(response.subCode, is(nullValue()));27        assertThat(response.subMsg, is(nullValue()));28        assertThat(response.httpBody, not(nullValue()));29        assertThat(response.imageId, not(nullValue()));30        assertThat(response.imageUrl, startsWith("https://"));31    }32}...

nullValue

Using AI Code Generation

1import static org.hamcrest.CoreMatchers.nullValue;2import static org.hamcrest.MatcherAssert.assertThat;3public class NullValueTest {4    public void testNullValue() {5        String str = null;6        assertThat(str, nullValue());7    }8}9Example 2: Using notNullValue() method10Example 3: Using hasItem() method11Example 4: Using hasItems() method12Example 5: Using hasKey() method

nullValue

Using AI Code Generation

1import static org.hamcrest.CoreMatchers.nullValue;2import static org.hamcrest.CoreMatchers.notNullValue;3import static org.hamcrest.MatcherAssert.assertThat;4import static org.hamcrest.Matchers.is;5import org.junit.Test;6public class NullValueTest {7    public void testNullValue() {8        String str = null;9        assertThat(str, is(nullValue()));10    }11    public void testNotNullValue() {12        String str = "not null";13        assertThat(str, is(notNullValue()));14    }15}

nullValue

Using AI Code Generation

1import static org.hamcrest.Matchers.*;2import static org.hamcrest.MatcherAssert.assertThat;3public class IsNullExample {4    public static void main(String[] args) {5        String str = null;6        assertThat(str, nullValue());7        assertThat(str, isNull());8    }9}

nullValue

Using AI Code Generation

1import static org.hamcrest.CoreMatchers.nullValue;2import static org.junit.Assert.assertThat;3import static org.junit.Assert.assertTrue;4import static org.junit.Assert.fail;5import org.junit.Test;6public class Test1 {7	public void test1() {8		assertThat(null, nullValue());9	}10}11import static org.junit.Assert.assertThat;12import static org.junit.Assert.assertTrue;13import static org.junit.Assert.fail;14import org.hamcrest.CoreMatchers;15import org.junit.Test;16public class Test1 {17	public void test1() {18		String actual = "hello";19		String expected = "hello";20		assertThat(actual, CoreMatchers.is(expected));21	}22}23import static org.hamcrest.CoreMatchers.is;24import static org.junit.Assert.assertThat;25import static org.junit.Assert.assertTrue;26import static org.junit.Assert.fail;27import org.junit.Test;28public class Test1 {29	public void test1()

nullValue

Using AI Code Generation

1import static org.hamcrest.CoreMatchers.nullValue;2import static org.hamcrest.Matchers.notNullValue;3import static org.hamcrest.Matchers.is;4import static org.hamcrest.Matchers.equalTo;5import static org.hamcrest.Matchers.not;6import static org.hamcrest.MatcherAssert.assertThat;7import org.junit.Test;8public class CoreMatchersTest {9    public void testNullValue() {10        assertThat(null, nullValue());11        assertThat(null, is(nullValue()));12        assertThat(null, equalTo(nullValue()));13        assertThat(null, is(equalTo(nullValue())));14        assertThat(null, not(notNullValue()));15        assertThat(null, not(is(notNullValue())));16        assertThat(null, not(equalTo(notNullValue())));17        assertThat(null, not(is(equalTo(notNullValue()))));18    }19}20import static org.hamcrest.Matchers.is;21import static org.hamcrest.Matchers.notNullValue;22import static org.hamcrest.Matchers.nullValue;23import static org.hamcrest.MatcherAssert.assertThat;24import org.junit.Test;25public class MatchersTest {26    public void testIsNull() {27        assertThat(null, is(nullValue()));28        assertThat(null, is(notNullValue()));29    }30}31org.hamcrest.CoreMatchersTest > testNullValue() PASSED32org.hamcrest.MatchersTest > testIsNull() PASSED

nullValue

Using AI Code Generation

1import static org.hamcrest.CoreMatchers.nullValue;2import static org.hamcrest.MatcherAssert.assertThat;3import org.testng.annotations.Test;4public class NullValue {5public void nullValueExample(){6assertThat(null, nullValue());7}8}9import static org.hamcrest.CoreMatchers.nullValue;10import static org.hamcrest.MatcherAssert.assertThat;11import org.testng.annotations.Test;12public class NullValue {13public void nullValueExample(){14assertThat(null, nullValue());15}16}

nullValue

Using AI Code Generation

1public void testNullValue() {2    String str = null;3    assertThat(str, is(nullValue()));4}5org.hamcrest.core.Is.is(org.hamcrest.core.IsNull.nullValue())6The following code snippet shows how to use the notNullValue() method of the CoreMatchers class to match non-null values:7public void testNotNullValue() {8    String str = "not null";9    assertThat(str, is(notNullValue()));10}11org.hamcrest.core.Is.is(org.hamcrest.core.IsNull.notNullValue())12The following code snippet shows how to use the sameInstance() method of the CoreMatchers class to match the same object:13public void testSameInstance() {14    String str1 = "same instance";15    String str2 = str1;16    assertThat(str1, is(sameInstance(str2)));17}18org.hamcrest.core.Is.is(org.hamcrest.core.IsSame.sameInstance("same instance"))19The sameInstance() method of the CoreMatchers class returns an instance of the IsSame class. This instance is passed to the is() method of the CoreMatchers class to create

nullValue

Using AI Code Generation

1package org.kodejava.example.hamcrest;2import org.hamcrest.Matcher;3import org.hamcrest.MatcherAssert;4import org.hamcrest.Matchers;5public class NullValueExample {6    public static void main(String[] args) {7        Matcher nullValueMatcher = Matchers.nullValue();8        Matcher nullStringValueMatcher = Matchers.nullValue(String.class);9        Matcher nullIntegerValueMatcher = Matchers.nullValue(Integer.class);10        Matcher nullLongValueMatcher = Matchers.nullValue(Long.class);11        Matcher nullDoubleValueMatcher = Matchers.nullValue(Double.class);12        Matcher nullFloatValueMatcher = Matchers.nullValue(Float.class);13        Matcher nullBooleanValueMatcher = Matchers.nullValue(Boolean.class);14        Matcher nullCharacterValueMatcher = Matchers.nullValue(Character.class);15        Matcher nullByteValueMatcher = Matchers.nullValue(Byte.class);16        Matcher nullShortValueMatcher = Matchers.nullValue(Short.class);17        Matcher nullObjectValueMatcher = Matchers.nullValue(Object.class);18        MatcherAssert.assertThat(null, nullValueMatcher);19        MatcherAssert.assertThat(null, nullStringValueMatcher);20        MatcherAssert.assertThat(null, nullIntegerValueMatcher);21        MatcherAssert.assertThat(null, nullLongValueMatcher);22        MatcherAssert.assertThat(null, nullDoubleValueMatcher);23        MatcherAssert.assertThat(null, nullFloatValueMatcher);24        MatcherAssert.assertThat(null, nullBooleanValueMatcher);

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.