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How to use describeTo method of org.hamcrest.core.IsEqual class

Best junit code snippet using org.hamcrest.core.IsEqual.describeTo

Source:ExpressiveObjectsMatchers.java

...48            public boolean matchesSafely(final String actual) {49                return super.matchesSafely(StringUtils.stripNewLines(actual));50            }51            @Override52            public void describeTo(final Description description) {53                description.appendText("a string (ignoring new lines) containing").appendValue(strippedExpected);54            }55        };56    }57    @Factory58    public static Matcher<String> equalToStripNewLines(final String expected) {59        final String strippedExpected = StringUtils.stripNewLines(expected);60        return new IsEqual<String>(strippedExpected) {61            @Override62            public boolean matches(final Object actualObj) {63                final String actual = (String) actualObj;64                return super.matches(StringUtils.stripNewLines(actual));65            }66            @Override67            public void describeTo(final Description description) {68                description.appendText("a string (ignoring new lines) equal to").appendValue(strippedExpected);69            }70        };71    }72    @Factory73    public static StringStartsWith startsWithStripNewLines(final String expected) {74        final String strippedExpected = StringUtils.stripNewLines(expected);75        return new StringStartsWith(strippedExpected) {76            @Override77            public boolean matchesSafely(final String actual) {78                return super.matchesSafely(StringUtils.stripNewLines(actual));79            }80            @Override81            public void describeTo(final Description description) {82                description.appendText("a string (ignoring new lines) starting with").appendValue(strippedExpected);83            }84        };85    }86    @Factory87    public static Matcher<String> endsWithStripNewLines(final String expected) {88        final String strippedExpected = StringUtils.stripNewLines(expected);89        return new StringEndsWith(strippedExpected) {90            @Override91            public boolean matchesSafely(final String actual) {92                return super.matchesSafely(StringUtils.stripNewLines(actual));93            }94            @Override95            public void describeTo(final Description description) {96                description.appendText("a string (ignoring new lines) ending with").appendValue(strippedExpected);97            }98        };99    }100    @Factory101    public static <T> Matcher<T> anInstanceOf(final Class<T> expected) {102        return new TypeSafeMatcher<T>() {103            @Override104            public boolean matchesSafely(final T actual) {105                return expected.isAssignableFrom(actual.getClass());106            }107            @Override108            public void describeTo(final Description description) {109                description.appendText("an instance of ").appendValue(expected);110            }111        };112    }113    @Factory114    public static Matcher<String> nonEmptyString() {115        return new TypeSafeMatcher<String>() {116            @Override117            public boolean matchesSafely(final String str) {118                return str != null && str.length() > 0;119            }120            @Override121            public void describeTo(final Description description) {122                description.appendText("a non empty string");123            }124        };125    }126    @Factory127    @SuppressWarnings("unchecked")128    public static Matcher<String> nonEmptyStringOrNull() {129        return CoreMatchers.anyOf(nullValue(String.class), nonEmptyString());130    }131    @Factory132    public static Matcher<List<?>> containsElementThat(final Matcher<?> elementMatcher) {133        return new TypeSafeMatcher<List<?>>() {134            @Override135            public boolean matchesSafely(final List<?> list) {136                for (final Object o : list) {137                    if (elementMatcher.matches(o)) {138                        return true;139                    }140                }141                return false;142            }143            @Override144            public void describeTo(final Description description) {145                description.appendText("contains element that ").appendDescriptionOf(elementMatcher);146            }147        };148    }149    @Factory150    public static <T extends Comparable<T>> Matcher<T> greaterThan(final T c) {151        return Matchers.greaterThan(c);152    }153    @Factory154    public static Matcher<Class<?>> classEqualTo(final Class<?> operand) {155        class ClassEqualsMatcher extends TypeSafeMatcher<Class<?>> {156            private final Class<?> clazz;157            public ClassEqualsMatcher(final Class<?> clazz) {158                this.clazz = clazz;159            }160            @Override161            public boolean matchesSafely(final Class<?> arg) {162                return clazz == arg;163            }164            @Override165            public void describeTo(final Description description) {166                description.appendValue(clazz);167            }168        }169        return new ClassEqualsMatcher(operand);170    }171    @Factory172    public static Matcher<File> existsAndNotEmpty() {173        return new TypeSafeMatcher<File>() {174            @Override175            public void describeTo(final Description arg0) {176                arg0.appendText("exists and is not empty");177            }178            @Override179            public boolean matchesSafely(final File f) {180                return f.exists() && f.length() > 0;181            }182        };183    }184    @Factory185    public static Matcher<String> matches(final String regex) {186        return new TypeSafeMatcher<String>() {187            @Override188            public void describeTo(final Description description) {189                description.appendText("string matching " + regex);190            }191            @Override192            public boolean matchesSafely(final String str) {193                return str.matches(regex);194            }195        };196    }197    @Factory198    public static <X> Matcher<Class<X>> anySubclassOf(final Class<X> cls) {199        return new TypeSafeMatcher<Class<X>>() {200            @Override201            public void describeTo(final Description arg0) {202                arg0.appendText("is subclass of ").appendText(cls.getName());203            }204            @Override205            public boolean matchesSafely(final Class<X> item) {206                return cls.isAssignableFrom(item);207            }208        };209    }210    @Factory211    public static <T> Matcher<List<T>> sameContentsAs(final List<T> expected) {212        return new TypeSafeMatcher<List<T>>() {213            @Override214            public void describeTo(final Description description) {215                description.appendText("same sequence as " + expected);216            }217            @Override218            public boolean matchesSafely(final List<T> actual) {219                return actual.containsAll(expected) && expected.containsAll(actual);220            }221        };222    }223    @Factory224    public static <T> Matcher<List<T>> listContaining(final T t) {225        return new TypeSafeMatcher<List<T>>() {226    227            @Override228            public void describeTo(Description arg0) {229                arg0.appendText("list containing ").appendValue(t);230            }231    232            @Override233            public boolean matchesSafely(List<T> arg0) {234                return arg0.contains(t);235            }236        };237    }238    @Factory239    public static <T> Matcher<List<T>> listContainingAll(final T... items) {240        return new TypeSafeMatcher<List<T>>() {241            @Override242            public void describeTo(Description arg0) {243                arg0.appendText("has items ").appendValue(items);244                245            }246            @Override247            public boolean matchesSafely(List<T> arg0) {248                return arg0.containsAll(Arrays.asList(items));249            }250        };251    }252    @Factory253    public static Matcher<List<Object>> containsObjectOfType(final Class<?> cls) {254        return new TypeSafeMatcher<List<Object>>() {255            @Override256            public void describeTo(final Description desc) {257                desc.appendText("contains instance of type " + cls.getName());258            }259            @Override260            public boolean matchesSafely(final List<Object> items) {261                for (final Object object : items) {262                    if (cls.isAssignableFrom(object.getClass())) {263                        return true;264                    }265                }266                return false;267            }268        };269    }270    @Factory271    public static Matcher<String> startsWith(final String expected) {272        return new TypeSafeMatcher<String>() {273            @Override274            public void describeTo(Description description) {275                description.appendText(" starts with '" + expected + "'");276            }277            @Override278            public boolean matchesSafely(String actual) {279                return actual.startsWith(expected);280            }281        };282    }283    @Factory284    public static Matcher<String> contains(final String expected) {285        return new TypeSafeMatcher<String>() {286            @Override287            public void describeTo(Description description) {288                description.appendText(" contains '" + expected + "'");289            }290            @Override291            public boolean matchesSafely(String actual) {292                return actual.contains(expected);293            }294        };295    }296    297    @Factory298    public static Matcher<File> equalsFile(final File file) throws IOException {299        final String canonicalPath = file.getCanonicalPath();300        return new TypeSafeMatcher<File>() {301            @Override302            public void describeTo(Description arg0) {303                arg0.appendText("file '" + canonicalPath + "'");304            }305            @Override306            public boolean matchesSafely(File arg0) {307                try {308                    return arg0.getCanonicalPath().equals(canonicalPath);309                } catch (IOException e) {310                    return false;311                }312            }313        };314    }315}...

Source:IsisMatchers.java

...30            public boolean matchesSafely(final String actual) {31                return super.matchesSafely(StringExtensions.stripNewLines(actual));32            }33            @Override34            public void describeTo(final Description description) {35                description.appendText("a string (ignoring new lines) containing").appendValue(strippedExpected);36            }37        };38    }39    @Factory40    public static Matcher<String> equalToStripNewLines(final String expected) {41        final String strippedExpected = StringExtensions.stripNewLines(expected);42        return new IsEqual<String>(strippedExpected) {43            @Override44            public boolean matches(final Object actualObj) {45                final String actual = (String) actualObj;46                return super.matches(StringExtensions.stripNewLines(actual));47            }48            @Override49            public void describeTo(final Description description) {50                description.appendText("a string (ignoring new lines) equal to").appendValue(strippedExpected);51            }52        };53    }54    @Factory55    public static StringStartsWith startsWithStripNewLines(final String expected) {56        final String strippedExpected = StringExtensions.stripNewLines(expected);57        return new StringStartsWith(strippedExpected) {58            @Override59            public boolean matchesSafely(final String actual) {60                return super.matchesSafely(StringExtensions.stripNewLines(actual));61            }62            @Override63            public void describeTo(final Description description) {64                description.appendText("a string (ignoring new lines) starting with").appendValue(strippedExpected);65            }66        };67    }68    @Factory69    public static Matcher<String> endsWithStripNewLines(final String expected) {70        final String strippedExpected = StringExtensions.stripNewLines(expected);71        return new StringEndsWith(strippedExpected) {72            @Override73            public boolean matchesSafely(final String actual) {74                return super.matchesSafely(StringExtensions.stripNewLines(actual));75            }76            @Override77            public void describeTo(final Description description) {78                description.appendText("a string (ignoring new lines) ending with").appendValue(strippedExpected);79            }80        };81    }82    @Factory83    public static <T> Matcher<T> anInstanceOf(final Class<T> expected) {84        return new TypeSafeMatcher<T>() {85            @Override86            public boolean matchesSafely(final T actual) {87                return expected.isAssignableFrom(actual.getClass());88            }89            @Override90            public void describeTo(final Description description) {91                description.appendText("an instance of ").appendValue(expected);92            }93        };94    }95    @Factory96    public static Matcher<String> nonEmptyString() {97        return new TypeSafeMatcher<String>() {98            @Override99            public boolean matchesSafely(final String str) {100                return str != null && str.length() > 0;101            }102            @Override103            public void describeTo(final Description description) {104                description.appendText("a non empty string");105            }106        };107    }108    @Factory109    @SuppressWarnings("unchecked")110    public static Matcher<String> nonEmptyStringOrNull() {111        return CoreMatchers.anyOf(nullValue(String.class), nonEmptyString());112    }113    @Factory114    public static Matcher<List<?>> containsElementThat(final Matcher<?> elementMatcher) {115        return new TypeSafeMatcher<List<?>>() {116            @Override117            public boolean matchesSafely(final List<?> list) {118                for (final Object o : list) {119                    if (elementMatcher.matches(o)) {120                        return true;121                    }122                }123                return false;124            }125            @Override126            public void describeTo(final Description description) {127                description.appendText("contains element that ").appendDescriptionOf(elementMatcher);128            }129        };130    }131    @Factory132    public static <T extends Comparable<T>> Matcher<T> greaterThan(final T c) {133        return Matchers.greaterThan(c);134    }135    @Factory136    public static Matcher<Class<?>> classEqualTo(final Class<?> operand) {137        class ClassEqualsMatcher extends TypeSafeMatcher<Class<?>> {138            private final Class<?> clazz;139            public ClassEqualsMatcher(final Class<?> clazz) {140                this.clazz = clazz;141            }142            @Override143            public boolean matchesSafely(final Class<?> arg) {144                return clazz == arg;145            }146            @Override147            public void describeTo(final Description description) {148                description.appendValue(clazz);149            }150        }151        return new ClassEqualsMatcher(operand);152    }153    @Factory154    public static Matcher<File> existsAndNotEmpty() {155        return new TypeSafeMatcher<File>() {156            @Override157            public void describeTo(final Description arg0) {158                arg0.appendText("exists and is not empty");159            }160            @Override161            public boolean matchesSafely(final File f) {162                return f.exists() && f.length() > 0;163            }164        };165    }166    @Factory167    public static Matcher<String> matches(final String regex) {168        return new TypeSafeMatcher<String>() {169            @Override170            public void describeTo(final Description description) {171                description.appendText("string matching " + regex);172            }173            @Override174            public boolean matchesSafely(final String str) {175                return str.matches(regex);176            }177        };178    }179    @Factory180    public static <X> Matcher<Class<X>> anySubclassOf(final Class<X> cls) {181        return new TypeSafeMatcher<Class<X>>() {182            @Override183            public void describeTo(final Description arg0) {184                arg0.appendText("is subclass of ").appendText(cls.getName());185            }186            @Override187            public boolean matchesSafely(final Class<X> item) {188                return cls.isAssignableFrom(item);189            }190        };191    }192    @Factory193    public static <T> Matcher<List<T>> sameContentsAs(final List<T> expected) {194        return new TypeSafeMatcher<List<T>>() {195            @Override196            public void describeTo(final Description description) {197                description.appendText("same sequence as " + expected);198            }199            @Override200            public boolean matchesSafely(final List<T> actual) {201                return actual.containsAll(expected) && expected.containsAll(actual);202            }203        };204    }205    @Factory206    public static <T> Matcher<List<T>> listContaining(final T t) {207        return new TypeSafeMatcher<List<T>>() {208    209            @Override210            public void describeTo(Description arg0) {211                arg0.appendText("list containing ").appendValue(t);212            }213    214            @Override215            public boolean matchesSafely(List<T> arg0) {216                return arg0.contains(t);217            }218        };219    }220    @Factory221    public static <T> Matcher<List<T>> listContainingAll(final T... items) {222        return new TypeSafeMatcher<List<T>>() {223            @Override224            public void describeTo(Description arg0) {225                arg0.appendText("has items ").appendValue(items);226                227            }228            @Override229            public boolean matchesSafely(List<T> arg0) {230                return arg0.containsAll(Arrays.asList(items));231            }232        };233    }234    @Factory235    public static Matcher<List<Object>> containsObjectOfType(final Class<?> cls) {236        return new TypeSafeMatcher<List<Object>>() {237            @Override238            public void describeTo(final Description desc) {239                desc.appendText("contains instance of type " + cls.getName());240            }241            @Override242            public boolean matchesSafely(final List<Object> items) {243                for (final Object object : items) {244                    if (cls.isAssignableFrom(object.getClass())) {245                        return true;246                    }247                }248                return false;249            }250        };251    }252    @Factory253    public static Matcher<String> startsWith(final String expected) {254        return new TypeSafeMatcher<String>() {255            @Override256            public void describeTo(Description description) {257                description.appendText(" starts with '" + expected + "'");258            }259            @Override260            public boolean matchesSafely(String actual) {261                return actual.startsWith(expected);262            }263        };264    }265    @Factory266    public static Matcher<String> contains(final String expected) {267        return new TypeSafeMatcher<String>() {268            @Override269            public void describeTo(Description description) {270                description.appendText(" contains '" + expected + "'");271            }272            @Override273            public boolean matchesSafely(String actual) {274                return actual.contains(expected);275            }276        };277    }278    279    @Factory280    public static Matcher<File> equalsFile(final File file) throws IOException {281        final String canonicalPath = file.getCanonicalPath();282        return new TypeSafeMatcher<File>() {283            @Override284            public void describeTo(Description arg0) {285                arg0.appendText("file '" + canonicalPath + "'");286            }287            @Override288            public boolean matchesSafely(File arg0) {289                try {290                    return arg0.getCanonicalPath().equals(canonicalPath);291                } catch (IOException e) {292                    return false;293                }294            }295        };296    }297}...

Source:NofMatchers.java

...34                return super.matchesSafely(StringUtils.stripNewLines(actual));35            }3637            @Override38            public void describeTo(final Description description) {39                description.appendText("a string (ignoring new lines) containing").appendValue(strippedExpected);40            }41        };42    }4344    @Factory45    public static Matcher<String> equalToStripNewLines(final String expected) {46        final String strippedExpected = StringUtils.stripNewLines(expected);47        return new IsEqual<String>(strippedExpected) {48            @Override49            public boolean matches(final Object actualObj) {50                final String actual = (String) actualObj;51                return super.matches(StringUtils.stripNewLines(actual));52            }5354            @Override55            public void describeTo(final Description description) {56                description.appendText("a string (ignoring new lines) equal to").appendValue(strippedExpected);57            }58        };59    }6061    @Factory62    public static Matcher<String> startsWithStripNewLines(final String expected) {63        final String strippedExpected = StringUtils.stripNewLines(expected);64        return new StringStartsWith(strippedExpected) {65            @Override66            public boolean matchesSafely(final String actual) {67                return super.matchesSafely(StringUtils.stripNewLines(actual));68            }6970            @Override71            public void describeTo(final Description description) {72                description.appendText("a string (ignoring new lines) starting with").appendValue(strippedExpected);73            }74        };75    }7677    @Factory78    public static Matcher<String> endsWithStripNewLines(final String expected) {79        final String strippedExpected = StringUtils.stripNewLines(expected);80        return new StringEndsWith(strippedExpected) {81            @Override82            public boolean matchesSafely(final String actual) {83                return super.matchesSafely(StringUtils.stripNewLines(actual));84            }8586            @Override87            public void describeTo(final Description description) {88                description.appendText("a string (ignoring new lines) ending with").appendValue(strippedExpected);89            }90        };91    }9293    public static <T> Matcher<T> anInstanceOf(final Class<T> expected) {94        return new TypeSafeMatcher<T>() {95            @Override96            public boolean matchesSafely(final T actual) {97                return expected.isAssignableFrom(actual.getClass());98            }99100            public void describeTo(final Description description) {101                description.appendText("an instance of ").appendValue(expected);102            }103        };104    }105106    @Factory107    public static Matcher<String> nonEmptyString() {108        return new TypeSafeMatcher<String>() {109            @Override110            public boolean matchesSafely(String str) {111                return str != null && str.length() > 0;112            }113114            public void describeTo(Description description) {115                description.appendText("a non empty string");116            }117            118        };119    }120121    @Factory122    @SuppressWarnings("unchecked")123    public static Matcher<String> nonEmptyStringOrNull() {124        return CoreMatchers.anyOf(nullValue(String.class), nonEmptyString());125    }126127    128    public static Matcher<List<?>> containsElementThat(final Matcher<?> elementMatcher) {129        return new TypeSafeMatcher<List<?>>() {130            public boolean matchesSafely(List<?> list) {131                for(Object o: list) {132                    if (elementMatcher.matches(o)) {133                        return true;134                    }135                }136                return false;137            }138139            public void describeTo(Description description) {140                description.appendText("contains element that ").appendDescriptionOf(elementMatcher);141            }142        };143    }144145146    @Factory147    public static <T extends Comparable<T>> Matcher<T> greaterThan(T c) {148        return new IsGreaterThan<T>(c);149    }150151152    @Factory153    public static Matcher<Class<?>> classEqualTo(final Class<?> operand) {154155        class ClassEqualsMatcher extends TypeSafeMatcher<Class<?>> {156            private final Class<?> clazz;157            public ClassEqualsMatcher(final Class<?> clazz) {158                this.clazz = clazz;159            }160161            @Override162            public boolean matchesSafely(final Class<?> arg) {163                return clazz == arg;164            }165166            public void describeTo(final Description description) {167                description.appendValue(clazz);168            }169        }170171        return new ClassEqualsMatcher(operand);172    }173    174}
...

Source:HamcrestAdapter.java

...4142               return result == null || result;43            }4445            public void describeTo(org.hamcrest.Description description)46            {47            }48         };49      }5051      return new HamcrestAdapter<T>(hamcrestMatcher);52   }5354   private HamcrestAdapter(org.hamcrest.Matcher<T> matcher)55   {56      hamcrestMatcher = matcher;57   }5859   public boolean matches(Object item)60   {61      return hamcrestMatcher.matches(item);62   }6364   public void describeTo(Description description)65   {66      org.hamcrest.Description strDescription = new org.hamcrest.StringDescription();67      hamcrestMatcher.describeTo(strDescription);68      description.appendText(strDescription.toString());69   }7071   public Object getInnerValue()72   {73      Object innermostMatcher = getInnermostMatcher();7475      return getArgumentValueFromMatcherIfAvailable(innermostMatcher);76   }7778   private Object getInnermostMatcher()79   {80      org.hamcrest.Matcher<T> innerMatcher = hamcrestMatcher;81
...

Source:Behaviour.java

...60        public boolean matchesSafely(T item) {61            return compareTo.compareTo(item) <= 0;62        }63        64        public void describeTo(Description description) {65            description.appendText("a value greater than ");66            description.appendValue(compareTo);67        }68    }69    70    public class IsLessThan<T extends Comparable<T>> extends TypeSafeMatcher<T> {71        private final Comparable<T> compareTo;72        73        public IsLessThan(Comparable<T> compareTo) {74            this.compareTo = compareTo;75        }76        77        public boolean matchesSafely(T item) {78            return compareTo.compareTo(item) > 0;79        }80        81        public void describeTo(Description description) {82            description.appendText("a value greater than ");83            description.appendValue(compareTo);84        }85    }86}...

Source:IsMapContainingSingleton.java

...29        }30        return false;31    }32    @Override33    public void describeTo(Description description) {34        description.appendText("map containing unique entry [");35        keyMatcher.describeTo(description);36        description.appendText("->");37        valueMatcher.describeTo(description);38        description.appendText("]");39    }40    41    @Factory42    public static  Matcher<Map<?, ?>> hasSingleEntry(Matcher<?> keyMatcher, Matcher<?> valueMatcher){43        return new IsMapContainingSingleton(keyMatcher, valueMatcher);44    }45    46    @Factory47    public static  Matcher<Map<?, ?>> hasSingleEntry(Entry<?, ?> entry){48        return hasSingleEntry(entry.getKey(), entry.getValue());49    }50    51    @Factory...

Source:CustomMatchers.java

...12            public boolean matchesSafely(Map<? extends K, ? extends V> kvMap) {13                return kvMap.size() == size;14            }15            @Override16            public void describeTo(Description description) {17                description.appendText(" has ").appendValue(size).appendText(" key/value pairs");18            }19        };20    }21    public static <T> Matcher<Optional<T>> equalToOptional(final T operand) {22        return new TypeSafeMatcher<Optional<T>>() {23            private Matcher<T> equalTo;24            @Override25            public void describeTo(Description description) {26                IsEqual.equalTo(equalTo).describeTo(description);27            }28            @Override29            protected boolean matchesSafely(Optional<T> t) {30                if (t.isPresent()) {31                    equalTo = IsEqual.equalTo(t.get());32                    return equalTo.matches(operand);33                }34                return false;35            }36        };37    }38}...

Source:IsEqual.java

1public class org.hamcrest.core.IsEqual<T> extends org.hamcrest.BaseMatcher<T> {2  public org.hamcrest.core.IsEqual(T);3  public boolean matches(java.lang.Object);4  public void describeTo(org.hamcrest.Description);5  public static <T> org.hamcrest.Matcher<T> equalTo(T);6}...

describeTo

Using AI Code Generation

1assertThat("test", equalTo("test"));2assertThat("test", not(equalTo("test")));3assertThat("test", sameInstance("test"));4assertThat("test", not(sameInstance("test")));5assertThat("test", instanceOf(String.class));6assertThat("test", not(instanceOf(Integer.class)));7assertThat(null, nullValue());8assertThat("test", not(nullValue()));9assertThat(null, nullValue(String.class));10assertThat("test", not(nullValue(Integer.class)));11assertThat(Arrays.asList("test"), hasItem("test"));12assertThat(Arrays.asList("test"), not(hasItem("test1")));13assertThat(Arrays.asList("test"), hasItems("test"));14assertThat(Arrays.asList("test"), not(hasItems("test1")));15assertThat(Arrays.asList("test"), hasItemInArray("test"));16assertThat(Arrays.asList("test"), not(hasItemInArray("test1")));17assertThat(Arrays.asList("test"), hasItemsInArray("test"));18assertThat(Arrays.asList("test"), not(hasItemsInArray("test1")));19assertThat("test", containsString("test"));

describeTo

Using AI Code Generation

1package com.baeldung.hamcrest;2import static org.hamcrest.MatcherAssert.assertThat;3import static org.hamcrest.Matchers.equalTo;4import org.hamcrest.Description;5import org.hamcrest.Matcher;6import org.hamcrest.TypeSafeDiagnosingMatcher;7import org.junit.Test;8public class HamcrestDescribeToAndDescribeMismatchUnitTest {9    public void givenString_whenEqual_thenCorrect() {10        String actual = "foo";11        String expected = "foo";12        assertThat(actual, equalTo(expected));13    }14    public void givenString_whenNotEqual_thenCorrect() {15        String actual = "foo";16        String expected = "bar";17        assertThat(actual, equalTo(expected));18    }19    public void givenString_whenNotEqualWithCustomMatcher_thenCorrect() {20        String actual = "foo";21        String expected = "bar";22        assertThat(actual, equalToWithDescribeTo(expected));23    }24    private Matcher<String> equalToWithDescribeTo(String expected) {25        return new TypeSafeDiagnosingMatcher<String>() {26            public void describeTo(Description description) {27                new IsEqual<>(expected).describeTo(description);28            }29            protected boolean matchesSafely(String actual, Description mismatchDescription) {30                boolean matches = new IsEqual<>(expected).matches(actual);31                if (!matches) {32                    new IsEqual<>(expected).describeMismatch(actual, mismatchDescription);33                }34                return matches;35            }36        };37    }38}39    at org.junit.Assert.assertEquals(Assert.java:115)40    at org.junit.Assert.assertEquals(Assert.java:144)41    at com.baeldung.hamcrest.HamcrestDescribeToAndDescribeMismatchUnitTest.givenString_whenNotEqualWithCustomMatcher_thenCorrect(HamcrestDescribeToAndDescribeMismatchUnitTest.java:45)

describeTo

Using AI Code Generation

1import org.hamcrest.core.IsEqual 2import org.hamcrest.MatcherAssert.assertThat3import org.hamcrest.Matcher4def matcher = new IsEqual("Hello World")5def matcher1 = new IsEqual("Hello World")6assertThat(matcher, matcher1)7def matcher2 = new IsEqual("Hello World")8def matcher3 = new IsEqual("Hello World")9assertThat(matcher2, matcher3)10def matcher4 = new IsEqual("Hello World")11def matcher5 = new IsEqual("Hello World")12assertThat(matcher4, matcher5)13def matcher6 = new IsEqual("Hello World")14def matcher7 = new IsEqual("Hello World")15assertThat(matcher6, matcher7)16def matcher8 = new IsEqual("Hello World")17def matcher9 = new IsEqual("Hello World")18assertThat(matcher8, matcher9)19def matcher10 = new IsEqual("Hello World")20def matcher11 = new IsEqual("Hello World")21assertThat(matcher10, matcher11)22def matcher12 = new IsEqual("Hello World")23def matcher13 = new IsEqual("Hello World")24assertThat(matcher12, matcher13)25def matcher14 = new IsEqual("Hello World")26def matcher15 = new IsEqual("Hello World")27assertThat(matcher14, matcher15)28def matcher16 = new IsEqual("Hello World")29def matcher17 = new IsEqual("Hello World")30assertThat(matcher16, matcher17)31def matcher18 = new IsEqual("Hello World")32def matcher19 = new IsEqual("Hello World")33assertThat(matcher18, matcher19)34def matcher20 = new IsEqual("Hello World")35def matcher21 = new IsEqual("Hello World")36assertThat(matcher20, matcher21)37def matcher22 = new IsEqual("Hello World")38def matcher23 = new IsEqual("Hello World")39assertThat(matcher22, matcher23)40def matcher24 = new IsEqual("Hello World")41def matcher25 = new IsEqual("Hello World")42assertThat(matcher24, matcher25)43def matcher26 = new IsEqual("Hello World")44def matcher27 = new IsEqual("Hello World")45assertThat(matcher26, matcher27)46def matcher28 = new IsEqual("Hello World")47def matcher29 = new IsEqual("Hello World")48assertThat(matcher28, matcher29)49def matcher30 = new IsEqual("Hello World")

describeTo

Using AI Code Generation

1def "should match the string"(){2}3def "should match the string"(){4}5def "should match the string"(){6}7def "should match the string"(){8}9def "should match the string"(){10}11def "should match the string"(){12}13def "should match the string"(){14}15def "should match the string"(){16}17def "should match the string"(){18}19def "should match the string"(){20}21def "should match the string"(){22}23def "should match the string"(){24}

describeTo

Using AI Code Generation

1describe("IsEqual matcher") {2  def matcher = IsEqual(1)3  matcher.describeTo(description)4  assert description.toString() == "1"5}6describe("IsEqual matcher") {7  def matcher = IsEqual(1)8  matcher.describeMismatch(2, description)9  assert description.toString() == "was <2>"10}11describe("IsEqual matcher") {12  def matcher = IsEqual(1)13  matcher.describeMismatch(1, description)14  assert description.toString() == "was <1>"15}16describe("IsEqual matcher") {17  def matcher = IsEqual(1)18  matcher.describeMismatch(null, description)19  assert description.toString() == "was null"20}21describe("IsEqual matcher") {22  def matcher = IsEqual(null)23  matcher.describeMismatch(1, description)24  assert description.toString() == "was <1>"25}26describe("IsEqual matcher") {27  def matcher = IsEqual(null)28  matcher.describeMismatch(null, description)29  assert description.toString() == "was null"30}31describe("IsEqual matcher") {32  def matcher = IsEqual("abc")33  matcher.describeMismatch("def", description)34  assert description.toString() == "was \"def\"

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.