How to use matches method of org.hamcrest.core.DescribedAs class

Best junit code snippet using org.hamcrest.core.DescribedAs.matches

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1/​/​ Generated source.2package org.hamcrest;34public class CoreMatchers {56 /​**7 * Decorates another Matcher, retaining the behavior but allowing tests8 * to be slightly more expressive.9 * 10 * eg. assertThat(cheese, equalTo(smelly))11 * vs assertThat(cheese, is(equalTo(smelly)))12 */​13 public static <T> org.hamcrest.Matcher<T> is(org.hamcrest.Matcher<T> matcher) {14 return org.hamcrest.core.Is.is(matcher);15 }1617 /​**18 * This is a shortcut to the frequently used is(equalTo(x)).19 * 20 * eg. assertThat(cheese, is(equalTo(smelly)))21 * vs assertThat(cheese, is(smelly))22 */​23 public static <T> org.hamcrest.Matcher<T> is(T value) {24 return org.hamcrest.core.Is.is(value);25 }2627 /​**28 * This is a shortcut to the frequently used is(instanceOf(SomeClass.class)).29 * 30 * eg. assertThat(cheese, is(instanceOf(Cheddar.class)))31 * vs assertThat(cheese, is(Cheddar.class))32 */​33 public static org.hamcrest.Matcher<java.lang.Object> is(java.lang.Class<?> type) {34 return org.hamcrest.core.Is.is(type);35 }3637 /​**38 * Inverts the rule.39 */​40 public static <T> org.hamcrest.Matcher<T> not(org.hamcrest.Matcher<T> matcher) {41 return org.hamcrest.core.IsNot.not(matcher);42 }4344 /​**45 * This is a shortcut to the frequently used not(equalTo(x)).46 * 47 * eg. assertThat(cheese, is(not(equalTo(smelly))))48 * vs assertThat(cheese, is(not(smelly)))49 */​50 public static <T> org.hamcrest.Matcher<T> not(T value) {51 return org.hamcrest.core.IsNot.not(value);52 }5354 /​**55 * Is the value equal to another value, as tested by the56 * {@link java.lang.Object#equals} invokedMethod?57 */​58 public static <T> org.hamcrest.Matcher<T> equalTo(T operand) {59 return org.hamcrest.core.IsEqual.equalTo(operand);60 }6162 /​**63 * Is the value an instance of a particular type?64 */​65 public static org.hamcrest.Matcher<java.lang.Object> instanceOf(java.lang.Class<?> type) {66 return org.hamcrest.core.IsInstanceOf.instanceOf(type);67 }6869 /​**70 * Evaluates to true only if ALL of the passed in matchers evaluate to true.71 */​72 public static <T> org.hamcrest.Matcher<T> allOf(org.hamcrest.Matcher<? extends T>... matchers) {73 return org.hamcrest.core.AllOf.allOf(matchers);74 }7576 /​**77 * Evaluates to true only if ALL of the passed in matchers evaluate to true.78 */​79 public static <T> org.hamcrest.Matcher<T> allOf(java.lang.Iterable<org.hamcrest.Matcher<? extends T>> matchers) {80 return org.hamcrest.core.AllOf.allOf(matchers);81 }8283 /​**84 * Evaluates to true if ANY of the passed in matchers evaluate to true.85 */​86 public static <T> org.hamcrest.Matcher<T> anyOf(org.hamcrest.Matcher<? extends T>... matchers) {87 return org.hamcrest.core.AnyOf.anyOf(matchers);88 }8990 /​**91 * Evaluates to true if ANY of the passed in matchers evaluate to true.92 */​93 public static <T> org.hamcrest.Matcher<T> anyOf(java.lang.Iterable<org.hamcrest.Matcher<? extends T>> matchers) {94 return org.hamcrest.core.AnyOf.anyOf(matchers);95 }9697 /​**98 * Creates a new instance of IsSame99 * 100 * @param object The predicate evaluates to true only when the argument is101 * this object.102 */​103 public static <T> org.hamcrest.Matcher<T> sameInstance(T object) {104 return org.hamcrest.core.IsSame.sameInstance(object);105 }106107 /​**108 * This matcher always evaluates to true.109 */​110 public static <T> org.hamcrest.Matcher<T> anything() {111 return org.hamcrest.core.IsAnything.anything();112 }113114 /​**115 * This matcher always evaluates to true.116 * 117 * @param description A meaningful string used when describing itself.118 */​119 public static <T> org.hamcrest.Matcher<T> anything(java.lang.String description) {120 return org.hamcrest.core.IsAnything.anything(description);121 }122123 /​**124 * This matcher always evaluates to true. With type inference.125 */​126 public static <T> org.hamcrest.Matcher<T> any(java.lang.Class<T> type) {127 return org.hamcrest.core.IsAnything.any(type);128 }129130 /​**131 * Matches if value is null.132 */​133 public static <T> org.hamcrest.Matcher<T> nullValue() {134 return org.hamcrest.core.IsNull.nullValue();135 }136137 /​**138 * Matches if value is null. With type inference.139 */​140 public static <T> org.hamcrest.Matcher<T> nullValue(java.lang.Class<T> type) {141 return org.hamcrest.core.IsNull.nullValue(type);142 }143144 /​**145 * Matches if value is not null.146 */​147 public static <T> org.hamcrest.Matcher<T> notNullValue() {148 return org.hamcrest.core.IsNull.notNullValue();149 }150151 /​**152 * Matches if value is not null. With type inference.153 */​154 public static <T> org.hamcrest.Matcher<T> notNullValue(java.lang.Class<T> type) {155 return org.hamcrest.core.IsNull.notNullValue(type);156 }157158 /​**159 * Wraps an existing matcher and overrides the description when it fails.160 */​161 public static <T> org.hamcrest.Matcher<T> describedAs(java.lang.String description, org.hamcrest.Matcher<T> matcher, java.lang.Object... values) {162 return org.hamcrest.core.DescribedAs.describedAs(description, matcher, values);163 }164165} ...

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...26 }27 public void testDelegatesMatchingToAnotherMatcher() {28 Matcher<Object> m1 = describedAs("irrelevant", anything());29 Matcher<Object> m2 = describedAs("irrelevant", not(anything()));30 assertTrue(m1.matches(new Object()));31 assertFalse(m2.matches("hi"));32 }33 public void testDelegatesMismatchDescriptionToAnotherMatcher() {34 Matcher<Integer> m1 = describedAs("irrelevant", equalTo(2));35 StringDescription description = new StringDescription();36 m1.describeMismatch(1, description);37 assertEquals("was <1>", description.toString());38 }39}...

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matches

Using AI Code Generation

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1import org.hamcrest.core.DescribedAs2import org.hamcrest.core.IsEqual3import org.hamcrest.core.IsNot4import spock.lang.Specification5class DescribedAsSpec extends Specification {6 def "DescribedAs"() {7 def matcher = new DescribedAs(new IsEqual('foo'), 'bar', 'baz')8 matcher.matches('foo')9 matcher.matches('bar')10 matcher.matches('baz')11 !matcher.matches('qux')12 }13}14import org.hamcrest.core.IsNot15import org.hamcrest.core.IsEqual16import org.hamcrest.core.IsSame17import spock.lang.Specification18class IsNotSpec extends Specification {19 def "IsNot"() {20 def matcher = new IsNot(new IsSame('foo'))21 matcher.matches('foo')22 !matcher.matches('bar')23 matcher.matches('baz')24 matcher.matches('qux')25 }26}27import org.hamcrest.core.IsSame28import spock.lang.Specification29class IsSameSpec extends Specification {30 def "IsSame"() {31 def matcher = new IsSame('foo')32 matcher.matches('foo')33 !matcher.matches('bar')34 matcher.matches('baz')35 matcher.matches('qux')36 }37}38import org.hamcrest.core.IsEqual39import spock.lang.Specification40class IsEqualSpec extends Specification {41 def "IsEqual"() {42 def matcher = new IsEqual('foo')43 matcher.matches('foo')44 !matcher.matches('bar')45 matcher.matches('baz')46 matcher.matches('qux')47 }48}

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matches

Using AI Code Generation

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1import org.hamcrest.core.DescribedAs2import org.hamcrest.core.IsEqual3import org.hamcrest.core.IsNot4import org.junit.Assert.assertThat5import org.junit.Test6class MatcherTest {7 fun testDescribedAs() {8 val matcher = IsEqual.equalTo("Hello World")9 val describedAs = DescribedAs.describedAs("A String containing %0", matcher, "Hello World")10 assertThat("Hello World", describedAs)11 assertThat("Hello World", IsNot.not(describedAs))12 }13}14 at org.junit.Assert.assertEquals(Assert.java:115)15 at org.junit.Assert.assertEquals(Assert.java:144)16 at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)17 at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:8)18 at com.baeldung.hamcrest.DescribedAsTest.testDescribedAs(DescribedAsTest.java:17)

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matches

Using AI Code Generation

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1import org.hamcrest.core.DescribedAs;2import org.hamcrest.core.StringContains;3public class DescribedAsExample {4 public static void main(String[] args) {5 String email = "invalidemailaddress";6 DescribedAs describedAs = new DescribedAs("Valid email address", new StringContains("@"), email);7 System.out.println(describedAs.matches(email));8 }9}

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matches

Using AI Code Generation

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1import org.hamcrest.core.DescribedAs2import org.junit.Test3import static org.hamcrest.MatcherAssert.assertThat4import static org.hamcrest.core.IsEqual.equalTo5import static org.hamcrest.core.StringContains.containsString6public class DescribedAsTest {7 public void testDescribedAs() {8 String str = "This is a sample string";9 String substring = "sample";10 assertThat(str, new DescribedAs("contains %0", containsString(substring), equalTo(substring)));11 }12}

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matches

Using AI Code Generation

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1import org.hamcrest.core.DescribedAs2import org.hamcrest.MatcherAssert3import org.hamcrest.Matchers4import static org.hamcrest.Matchers.*5def matches = new DescribedAs(6 new IsEqual("abc"),7def assertThat = new MatcherAssert()8assertThat.assertThat("abc", matches)9import org.hamcrest.core.IsEqual10import org.hamcrest.MatcherAssert11import org.hamcrest.Matchers12import static org.hamcrest.Matchers.*13def assertThat = new MatcherAssert()14assertThat.assertThat("abc", new IsEqual("abc"))15import org.hamcrest.MatcherAssert16import org.hamcrest.Matchers17import static org.hamcrest.Matchers.*18def assertThat = new MatcherAssert()19assertThat.assertThat("abc", equalTo("abc"))20import org.hamcrest.MatcherAssert21import org.hamcrest.Matchers22import static org.hamcrest.Matchers.*23def assertThat = new MatcherAssert()24assertThat.assertThat("abc", equalTo("abc"))25import org.hamcrest.MatcherAssert26import org.hamcrest.Matchers27import static org.hamcrest.Matchers.*28def assertThat = new MatcherAssert()29assertThat.assertThat("abc", equalTo("abc"))

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matches

Using AI Code Generation

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1import org.hamcrest.core.DescribedAs2import org.hamcrest.core.IsEqual3import org.hamcrest.core.StringContains4import org.hamcrest.MatcherAssert.assertThat5def matcher = new DescribedAs(new IsEqual("Hello World"), "Hello World")6assertThat(string, matcher)7assertThat(string, new DescribedAs(new StringContains("Hello"), "Hello"))

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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;
https://stackoverflow.com/questions/1092219/assertcontains-on-strings-in-junit

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