Best junit code snippet using org.hamcrest.Description.NullDescription
Source: Same_ESTest_scaffolding.java
1/**2 * Scaffolding file used to store all the setups needed to run 3 * tests automatically generated by EvoSuite4 * Sat Jan 05 18:49:40 GMT 20195 */6package org.mockito.internal.matchers;7import org.evosuite.runtime.annotation.EvoSuiteClassExclude;8import org.junit.BeforeClass;9import org.junit.Before;10import org.junit.After;11import org.junit.AfterClass;12import org.evosuite.runtime.sandbox.Sandbox;13import org.evosuite.runtime.sandbox.Sandbox.SandboxMode;14@EvoSuiteClassExclude15public class Same_ESTest_scaffolding {16 @org.junit.Rule 17 public org.evosuite.runtime.vnet.NonFunctionalRequirementRule nfr = new org.evosuite.runtime.vnet.NonFunctionalRequirementRule();18 private static final java.util.Properties defaultProperties = (java.util.Properties) java.lang.System.getProperties().clone(); 19 private org.evosuite.runtime.thread.ThreadStopper threadStopper = new org.evosuite.runtime.thread.ThreadStopper (org.evosuite.runtime.thread.KillSwitchHandler.getInstance(), 3000);20 @BeforeClass 21 public static void initEvoSuiteFramework() { 22 org.evosuite.runtime.RuntimeSettings.className = "org.mockito.internal.matchers.Same"; 23 org.evosuite.runtime.GuiSupport.initialize(); 24 org.evosuite.runtime.RuntimeSettings.maxNumberOfThreads = 100; 25 org.evosuite.runtime.RuntimeSettings.maxNumberOfIterationsPerLoop = 10000; 26 org.evosuite.runtime.RuntimeSettings.mockSystemIn = true; 27 org.evosuite.runtime.RuntimeSettings.sandboxMode = org.evosuite.runtime.sandbox.Sandbox.SandboxMode.RECOMMENDED; 28 org.evosuite.runtime.sandbox.Sandbox.initializeSecurityManagerForSUT(); 29 org.evosuite.runtime.classhandling.JDKClassResetter.init();30 setSystemProperties();31 initializeClasses();32 org.evosuite.runtime.Runtime.getInstance().resetRuntime(); 33 } 34 @AfterClass 35 public static void clearEvoSuiteFramework(){ 36 Sandbox.resetDefaultSecurityManager(); 37 java.lang.System.setProperties((java.util.Properties) defaultProperties.clone()); 38 } 39 @Before 40 public void initTestCase(){ 41 threadStopper.storeCurrentThreads();42 threadStopper.startRecordingTime();43 org.evosuite.runtime.jvm.ShutdownHookHandler.getInstance().initHandler(); 44 org.evosuite.runtime.sandbox.Sandbox.goingToExecuteSUTCode(); 45 setSystemProperties(); 46 org.evosuite.runtime.GuiSupport.setHeadless(); 47 org.evosuite.runtime.Runtime.getInstance().resetRuntime(); 48 org.evosuite.runtime.agent.InstrumentingAgent.activate(); 49 } 50 @After 51 public void doneWithTestCase(){ 52 threadStopper.killAndJoinClientThreads();53 org.evosuite.runtime.jvm.ShutdownHookHandler.getInstance().safeExecuteAddedHooks(); 54 org.evosuite.runtime.classhandling.JDKClassResetter.reset(); 55 resetClasses(); 56 org.evosuite.runtime.sandbox.Sandbox.doneWithExecutingSUTCode(); 57 org.evosuite.runtime.agent.InstrumentingAgent.deactivate(); 58 org.evosuite.runtime.GuiSupport.restoreHeadlessMode(); 59 } 60 public static void setSystemProperties() {61 62 java.lang.System.setProperties((java.util.Properties) defaultProperties.clone()); 63 java.lang.System.setProperty("file.encoding", "UTF-8"); 64 java.lang.System.setProperty("java.awt.headless", "true"); 65 java.lang.System.setProperty("java.io.tmpdir", "/tmp"); 66 java.lang.System.setProperty("user.country", "US"); 67 java.lang.System.setProperty("user.dir", "/tmp/run_evosuite.pl_201327_1546714169"); 68 java.lang.System.setProperty("user.home", "/root"); 69 java.lang.System.setProperty("user.language", "en"); 70 java.lang.System.setProperty("user.name", "root"); 71 java.lang.System.setProperty("user.timezone", "America/Los_Angeles"); 72 }73 private static void initializeClasses() {74 org.evosuite.runtime.classhandling.ClassStateSupport.initializeClasses(Same_ESTest_scaffolding.class.getClassLoader() ,75 "org.hamcrest.BaseMatcher",76 "org.mockito.ArgumentMatcher",77 "org.hamcrest.Description",78 "org.hamcrest.BaseDescription",79 "org.hamcrest.StringDescription",80 "org.hamcrest.Matcher",81 "org.hamcrest.SelfDescribing",82 "org.hamcrest.Description$NullDescription",83 "org.mockito.internal.matchers.Same"84 );85 } 86 private static void resetClasses() {87 org.evosuite.runtime.classhandling.ClassResetter.getInstance().setClassLoader(Same_ESTest_scaffolding.class.getClassLoader()); 88 org.evosuite.runtime.classhandling.ClassStateSupport.resetClasses(89 "org.hamcrest.BaseMatcher",90 "org.mockito.ArgumentMatcher",91 "org.mockito.internal.matchers.Same",92 "org.hamcrest.Description$NullDescription",93 "org.hamcrest.BaseDescription",94 "org.hamcrest.StringDescription",95 "org.hamcrest.core.IsNull",96 "org.hamcrest.internal.ReflectiveTypeFinder",97 "org.hamcrest.TypeSafeMatcher",98 "org.hamcrest.beans.HasProperty",99 "org.hamcrest.beans.PropertyUtil",100 "org.hamcrest.core.ShortcutCombination",101 "org.hamcrest.core.AnyOf",102 "org.hamcrest.text.IsEmptyString",103 "org.hamcrest.Description",104 "org.hamcrest.TypeSafeDiagnosingMatcher",105 "org.hamcrest.beans.HasPropertyWithValue$2",106 "org.hamcrest.beans.HasPropertyWithValue",107 "org.hamcrest.DiagnosingMatcher",108 "org.hamcrest.core.IsInstanceOf",109 "org.hamcrest.internal.SelfDescribingValueIterator",110 "org.hamcrest.internal.SelfDescribingValue",111 "org.hamcrest.core.CombinableMatcher",112 "org.hamcrest.core.AllOf",113 "org.hamcrest.collection.IsArrayContainingInAnyOrder",114 "org.hamcrest.core.IsAnything",115 "org.hamcrest.FeatureMatcher",116 "org.hamcrest.object.HasToString",117 "org.hamcrest.core.IsEqual",118 "org.hamcrest.core.Is",119 "org.hamcrest.collection.IsArrayWithSize",120 "org.hamcrest.beans.SamePropertyValuesAs",121 "org.hamcrest.core.SubstringMatcher",122 "org.hamcrest.core.StringStartsWith",123 "org.hamcrest.core.IsSame",124 "org.hamcrest.number.OrderingComparison",125 "org.hamcrest.core.Every",126 "org.hamcrest.core.IsNot",127 "org.hamcrest.collection.IsIterableContainingInAnyOrder",128 "org.hamcrest.object.IsEventFrom",129 "org.hamcrest.collection.IsIn",130 "org.hamcrest.collection.IsIterableWithSize",131 "org.hamcrest.beans.SamePropertyValuesAs$PropertyMatcher",132 "org.hamcrest.core.IsCollectionContaining",133 "org.hamcrest.collection.IsCollectionWithSize",134 "org.hamcrest.collection.IsEmptyIterable",135 "org.hamcrest.text.StringContainsInOrder",136 "org.hamcrest.core.StringEndsWith",137 "org.hamcrest.text.IsEqualIgnoringCase",138 "org.hamcrest.collection.IsArrayContaining",139 "org.hamcrest.collection.IsEmptyCollection"140 );141 }142}...
Source: AbsentMatcherTest.java
...51 Description description = new StringDescription();52 new AbsentMatcher<>().describeTo(description);53 assertThat(description, hasToString("absent"));54 }55 private Description.NullDescription desc()56 {57 return new Description.NullDescription();58 }59 private static final class BrokenAbsent implements Optional<Date>60 {61 @Override62 public boolean isPresent()63 {64 return false;65 }66 @Override67 public Date value() throws NoSuchElementException68 {69 return new Date();70 }71 }...
Source: PresentMatcherTest.java
...31{32 @Test33 public void testMatchesSafely()34 {35 assertThat(new PresentMatcher<>().matchesSafely(absent(), new Description.NullDescription()), is(false));36 assertThat(new PresentMatcher<String>().matchesSafely(new Present<>("test"), new Description.NullDescription()), is(true));37 assertThat(new PresentMatcher<>("test").matchesSafely(new Present<>("test"), new Description.NullDescription()), is(true));38 assertThat(new PresentMatcher<>("test").matchesSafely(new Present<>("tost"), new Description.NullDescription()), is(false));39 assertThat(present().matchesSafely(new Present<>("test"), new Description.NullDescription()), is(true));40 assertThat(present("test").matchesSafely(new Present<>("test"), new Description.NullDescription()), is(true));41 assertThat(present(is("test")).matchesSafely(new Present<>("test"), new Description.NullDescription()), is(true));42 assertThat(present("tost").matchesSafely(new Present<>("test"), new Description.NullDescription()), is(false));43 assertThat(present(is("tost")).matchesSafely(new Present<>("test"), new Description.NullDescription()), is(false));44 }45 @Test46 public void testValueMismatchDescription()47 {48 Description mismatchMsg = new StringDescription();49 new PresentMatcher<>("123").describeMismatch(new Present<>("abc"), mismatchMsg);50 assertThat(mismatchMsg.toString(), is("present, but value was \"abc\""));51 }52 @Test53 public void testPresenceMismatchDescription()54 {55 Description mismatchMsg = new StringDescription();56 new PresentMatcher<>("123").describeMismatch(absent(), mismatchMsg);57 assertThat(mismatchMsg.toString(), is("not present"));...
Source: TestControllerTests.java
...33 }34 @Test35 public void testMatcher() throws Exception {36 Matcher<String> matcher = hasProperty("name");37// matcher.describeMismatch("Foo", new Description.NullDescription());38 }39//40// public static class MyMatcher extends BaseMatcher<String> {41// @Override42// public boolean matches(Object item) { return false; }43// @Override44// public void describeMismatch(Object item, Description description) { super.describeMismatch(item, description); }45// @Override46// public void describeTo(Description description) { }47// }48}...
Source: TypeSafeDiagnosingMatcher.java
...16 this(TYPE_FINDER);17 }18 @Override // org.hamcrest.Matcher19 public final boolean matches(Object item) {20 return item != null && this.expectedType.isInstance(item) && matchesSafely(item, new Description.NullDescription());21 }22 @Override // org.hamcrest.BaseMatcher, org.hamcrest.Matcher23 public final void describeMismatch(Object item, Description mismatchDescription) {24 if (item == null || !this.expectedType.isInstance(item)) {25 super.describeMismatch(item, mismatchDescription);26 } else {27 matchesSafely(item, mismatchDescription);28 }29 }30}...
Source: Description$NullDescription.java
1public final class org.hamcrest.Description$NullDescription implements org.hamcrest.Description {2 public org.hamcrest.Description$NullDescription();3 public org.hamcrest.Description appendDescriptionOf(org.hamcrest.SelfDescribing);4 public org.hamcrest.Description appendList(java.lang.String, java.lang.String, java.lang.String, java.lang.Iterable<? extends org.hamcrest.SelfDescribing>);5 public org.hamcrest.Description appendText(java.lang.String);6 public org.hamcrest.Description appendValue(java.lang.Object);7 public <T> org.hamcrest.Description appendValueList(java.lang.String, java.lang.String, java.lang.String, T...);8 public <T> org.hamcrest.Description appendValueList(java.lang.String, java.lang.String, java.lang.String, java.lang.Iterable<T>);9 public java.lang.String toString();10}...
Source: NullDescriptionTest.java
1package org.hamcrest;2import org.hamcrest.Description.NullDescription;3import org.junit.Test;4import static org.junit.Assert.assertEquals;5public final class NullDescriptionTest {6 private final NullDescription nullDescription = new Description.NullDescription();7 @Test public void8 isUnchangedByAppendedText() {9 nullDescription.appendText("myText");10 assertEquals("", nullDescription.toString());11 }12}...
Description.NullDescription
Using AI Code Generation
1import org.hamcrest.Description;2import org.hamcrest.TypeSafeMatcher;3public class NullDescription extends TypeSafeMatcher<String> {4 public void describeTo(Description description) {5 description.appendText("null description");6 }7 protected boolean matchesSafely(String item) {8 return item == null;9 }10}11import org.hamcrest.Description;12import org.hamcrest.TypeSafeMatcher;13public class NullDescription extends TypeSafeMatcher<String> {14 public void describeTo(Description description) {15 description.appendText("null description");16 }17 protected boolean matchesSafely(String item) {18 return item == null;19 }20}21import org.hamcrest.Description;22import org.hamcrest.TypeSafeMatcher;23public class NullDescription extends TypeSafeMatcher<String> {24 public void describeTo(Description description) {25 description.appendText("null description");26 }27 protected boolean matchesSafely(String item) {28 return item == null;29 }30}31import org.hamcrest.Description;32import org.hamcrest.TypeSafeMatcher;33public class NullDescription extends TypeSafeMatcher<String> {34 public void describeTo(Description description) {35 description.appendText("null description");36 }37 protected boolean matchesSafely(String item) {38 return item == null;39 }40}41import org.hamcrest.Description;42import org.hamcrest.TypeSafeMatcher;43public class NullDescription extends TypeSafeMatcher<String> {44 public void describeTo(Description description) {45 description.appendText("null description");46 }47 protected boolean matchesSafely(String item) {48 return item == null;49 }50}51import org.hamcrest.Description;52import org.hamcrest.TypeSafeMatcher;53public class NullDescription extends TypeSafeMatcher<String> {54 public void describeTo(Description description) {55 description.appendText("null description");56 }57 protected boolean matchesSafely(String item) {58 return item == null;59 }60}
Description.NullDescription
Using AI Code Generation
1import static org.hamcrest.Description.NullDescription;2import static org.hamcrest.MatcherAssert.assertThat;3import static org.hamcrest.Matchers.equalTo;4import static org.hamcrest.Matchers.is;5import static org.hamcrest.Matchers.nullValue;6import static org.hamcrest.Description;7import static org.hamcrest.MatcherAssert.assertThat;8import static org.hamcrest.Matchers.equalTo;9import static org.hamcrest.Matchers.is;10import static org.hamcrest.Matchers.nullValue;11import static org.hamcrest.core.Description;12import static org.hamcrest.MatcherAssert.assertThat;13import static org.hamcrest.Matchers.equalTo;14import static org.hamcrest.Matchers.is;15import static org.hamcrest.Matchers.nullValue;16import static org.hamcrest.core.Description;17import static org.hamcrest.MatcherAssert.assertThat;18import static org.hamcrest.Matchers.equalTo;19import static org.hamcrest.Matchers.is;20import static org.hamcrest.Matchers.nullValue;21import static org.hamcrest.core.Description;22import static org.hamcrest.MatcherAssert.assertThat;23import static org.hamcrest.Matchers.equalTo;24import static org.hamcrest.Matchers.is;25import static org.hamcrest.Matchers.nullValue;26import static org.hamcrest.core.Description;27import static org.hamcrest.MatcherAssert.assertThat;28import static org.hamcrest.Matchers.equalTo;29import static org.hamcrest.Matchers.is;30import static org.hamcrest.Matchers.nullValue;31import static org.hamcrest.core.Description;32import static org.hamcrest.MatcherAssert.assertThat;33import static org.hamcrest.Matchers.equalTo;34import static org.hamcrest.Matchers.is;35import static org.hamcrest.Matchers.nullValue;36import static org.hamcrest.core.Description;37import static org.hamcrest.MatcherAssert.assertThat;38import static org.hamcrest.Matchers.equalTo;39import static org.hamcrest.Matchers.is;40import static org.hamcrest.Matchers.nullValue;41import static org.hamcrest.core.Description;42import static org.hamcrest.MatcherAssert.assertThat;43import static org.hamcrest.Matchers.equalTo;44import static org.hamcrest.Matchers.is;45import static org.hamcrest.Matchers.nullValue;46import static org.hamcrest.core.Description;47import static org.hamcrest.MatcherAssert.assertThat;48import static org.hamcrest.Matchers.equalTo;49import static org.hamcrest.Matchers.is;50import static org.hamcrest.Matchers.nullValue;51import static org.hamcrest.core.Description;52import static
Description.NullDescription
Using AI Code Generation
1import static org.hamcrest.Description.NullDescription;2import static org.hamcrest.Matchers.*;3import static org.junit.Assert.assertThat;4import org.hamcrest.Description;5import org.hamcrest.Matcher;6import org.hamcrest.StringDescription;7import org.junit.Test;8public class NullDescriptionTest {9 public void testNullDescription() {10 Matcher<String> matcher = containsString("a");11 Description description = new StringDescription();12 matcher.describeTo(description);13 assertThat(description.toString(), equalTo("a string containing \"a\""));14 description = new NullDescription();15 matcher.describeTo(description);16 assertThat(description.toString(), equalTo(""));17 }18}
Description.NullDescription
Using AI Code Generation
1import org.hamcrest.Description;2import org.hamcrest.Matcher;3import org.hamcrest.StringDescription;4import org.hamcrest.core.IsEqual;5import org.junit.Test;6import static org.hamcrest.MatcherAssert.assertThat;7import static org.hamcrest.core.IsEqual.equalTo;8import static org.hamcrest.core.IsNot.not;9public class NullDescriptionTest {10 public void testNullDescription() {11 Matcher<String> matcher = equalTo("myValue");12 StringDescription description = new StringDescription();13 matcher.describeTo(description);14 assertThat(description.toString(), equalTo("myValue"));15 matcher.describeMismatch(null, new Description.NullDescription());16 }17 public void testNullDescriptionWithIsEqual() {18 Matcher<String> matcher = IsEqual.equalTo("myValue");19 StringDescription description = new StringDescription();20 matcher.describeTo(description);21 assertThat(description.toString(), equalTo("myValue"));22 matcher.describeMismatch(null, new Description.NullDescription());23 }24 public void testNullDescriptionWithNot() {25 Matcher<String> matcher = not(equalTo("myValue"));26 StringDescription description = new StringDescription();27 matcher.describeTo(description);28 assertThat(description.toString(), equalTo("not \"myValue\""));29 matcher.describeMismatch(null, new Description.NullDescription());30 }31}32org.hamcrest.Description.NullDescriptionTest > testNullDescription() PASSED33org.hamcrest.Description.NullDescriptionTest > testNullDescriptionWithIsEqual() PASSED34org.hamcrest.Description.NullDescriptionTest > testNullDescriptionWithNot() PASSED
Description.NullDescription
Using AI Code Generation
1import static org.hamcrest.Matchers.nullValue2import org.hamcrest.Description3import org.hamcrest.Matcher4import org.hamcrest.TypeSafeMatcher5import org.hamcrest.core.IsEqual6import org.hamcrest.core.IsNull7class NullDescription extends TypeSafeMatcher {8 public static Matcher nullDescription() {9 return new NullDescription()10 }11 boolean matchesSafely(Object item) {12 }13 void describeTo(Description description) {14 description.appendText("null")15 }16}17def "null description"() {18 nullDescription().matches(null)19}20def "null description"() {21 nullDescription().matches("")22}23def "null description"() {24 nullDescription().matches(new Object())25}26def "null description"() {27 nullDescription().matches(123)28}29def "null description"() {30 nullDescription().matches(123.45)31}32def "null description"() {33 nullDescription().matches(true)34}35def "null description"() {36 nullDescription().matches(false)37}38def "null description"() {39 nullDescription().matches('a')40}41def "null description"() {42 nullDescription().matches("a")43}44def "null description"() {45 nullDescription().matches(new Date())46}47def "null description"() {48 nullDescription().matches(new int[0])49}50def "null description"() {51 nullDescription().matches(new int[1])52}53def "null description"() {54 nullDescription().matches(new int[1, 2])55}56def "null description"() {57 nullDescription().matches(new int[1, 2, 3])58}59def "null description"() {60 nullDescription().matches(new int[1, 2, 3, 4])61}62def "null description"() {63 nullDescription().matches(new int[1, 2, 3, 4, 5])64}65def "null description"() {66 nullDescription().matches(new int[1, 2, 3, 4, 5, 6])67}68def "null description"() {
JUnit 4 Expected Exception type
java: how to mock Calendar.getInstance()?
Changing names of parameterized tests
Mocking a class vs. mocking its interface
jUnit ignore @Test methods from base class
Important frameworks/tools to learn
Unit testing a Java Servlet
Meaning of delta or epsilon argument of assertEquals for double values
Different teardown for each @Test in jUnit
Best way to automagically migrate tests from JUnit 3 to JUnit 4?
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
.
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