How to use assertThat method of org.assertj.core.api.Assertions class

Best Assertj code snippet using org.assertj.core.api.Assertions.assertThat

Source:AssertionsCompletenessCheck.java

...9  @Rule10  public final org.assertj.core.api.JUnitSoftAssertions junit_soft_assertions = new org.assertj.core.api.JUnitSoftAssertions();11  @Test12  public void fest_assertions() {13    org.fest.assertions.Assertions.assertThat(true); // Noncompliant {{Complete the assertion.}}14    org.fest.assertions.Assertions.assertThat(true).as("foo"); // Noncompliant15    org.fest.assertions.Assertions.assertThat(true).describedAs("foo");  // Noncompliant16    org.fest.assertions.Assertions.assertThat(true).overridingErrorMessage("foo");  // Noncompliant17    org.fest.assertions.Assertions.assertThat(true).isTrue(); // Compliant18    org.fest.assertions.Assertions.assertThat(AssertionsCompletenessCheck.class.toString()).hasSize(0); // Compliant19    org.fest.assertions.Assertions.assertThat(AssertionsCompletenessCheck.class.toString()).as("aa").hasSize(0); // Compliant20  }21  private BooleanAssert return_fest_assertion(String filename, String key) {22    // Compliant, no issue is raised for return statements and variable assignments to allow helper methods23    BooleanAssert result = org.fest.assertions.Assertions.assertThat(filename.contains(key));24    return org.fest.assertions.Assertions.assertThat(filename.contains(key));25  }26  @Test27  public void call_fest_assertion_builder() {28    return_fest_assertion("foo.txt", "key1").isTrue();29    return_fest_assertion("bar.txt", "key2").isTrue();30  }31  @Test32  public void mockito_assertions() {33    List<String> mockedList = Mockito.mock(List.class);34    Mockito.verify(mockedList); // Noncompliant35    Mockito.verify(mockedList, Mockito.times(0)); // Noncompliant36    Mockito.verify(mockedList).add("one");37    Mockito.verify(mockedList, Mockito.times(0)).clear();38    Mockito.verifyNoMoreInteractions(mockedList);39    Mockito.verifyZeroInteractions(mockedList);40  }41  @Test42  public void junit_assertions() {43    org.junit.Assert.assertThat(3, org.hamcrest.Matchers.is(3));44  }45  @Test46  public void google_truth_assertions() {47    boolean b = true;48    Truth.assertThat(b).isTrue();49    String s = "Hello Truth Framework World!";50    Truth.assertThat(s).contains("Hello");51    Truth.assertThat(b); // Noncompliant52    Truth.assertWithMessage("Invalid option").that(b).isFalse();53    Truth.assertWithMessage("Invalid option").that(b); // Noncompliant54  }55  @Test56  public void assertj_assertions() {57    org.assertj.core.api.Assertions.assertThat(1).isGreaterThan(0);58    org.assertj.core.api.Assertions.assertThat(1); // Noncompliant59    org.assertj.core.api.Assertions.assertThat(1).withThreadDumpOnError().isGreaterThan(0);60    org.assertj.core.api.Assertions.assertThat(1).withThreadDumpOnError(); // Noncompliant61    org.assertj.core.api.Assertions.assertThat(1).overridingErrorMessage("error").isGreaterThan(0);62    org.assertj.core.api.Assertions.assertThat(1).overridingErrorMessage("error"); // Noncompliant63    org.assertj.core.api.Assertions.assertThat(1).usingDefaultComparator().isGreaterThan(0);64    org.assertj.core.api.Assertions.assertThat(1).usingDefaultComparator(); // Noncompliant65    Comparator customComparator = null;66    org.assertj.core.api.Assertions.assertThat(1).usingComparator(customComparator).isGreaterThanOrEqualTo(0);67    org.assertj.core.api.Assertions.assertThat(1).usingComparator(customComparator); // Noncompliant68    org.assertj.core.api.Assertions.assertThat("a").asString().hasSize(1);69    org.assertj.core.api.Assertions.assertThat("a").asString(); // Noncompliant70    List a = null;71    org.assertj.core.api.Assertions.assertThat(a).asList().hasSize(0);72    org.assertj.core.api.Assertions.assertThat(a).asList(); // Noncompliant73    org.assertj.core.api.SoftAssertions softly = new org.assertj.core.api.SoftAssertions();74    softly.assertThat(1); // Noncompliant75    softly.assertAll();76  }77  @Test78  public void assertj_soft_assertions_without_assertAll() {79    org.assertj.core.api.SoftAssertions softly = new org.assertj.core.api.SoftAssertions();80    softly.assertThat(5).isLessThan(3);81    softly.assertThat(1).isGreaterThan(2);82  } // Noncompliant {{Add a call to 'assertAll' after all 'assertThat'.}}83  @Test84  public void assertj_soft_assertions_without_assertThat() {85    org.assertj.core.api.SoftAssertions softly = new org.assertj.core.api.SoftAssertions();86    softly.assertAll(); // Noncompliant {{Add one or more 'assertThat' before 'assertAll'.}}87  }88  @Test89  public void assertj_soft_assertions_try_with_resource() {90    try(org.assertj.core.api.AutoCloseableSoftAssertions softly = new org.assertj.core.api.AutoCloseableSoftAssertions()) {91      softly.assertThat(1).isLessThan(2);92    } // Compliant, no need to call "assertAll()", it will be called by AutoCloseableSoftAssertions93  }94  @Test95  public void assertj_soft_assertions_try_with_resource_without_assertThat() {96    try(org.assertj.core.api.AutoCloseableSoftAssertions softly = new org.assertj.core.api.AutoCloseableSoftAssertions()) {97    } // Noncompliant {{Add one or more 'assertThat' before the end of this try block.}}98  }99  @Test100  public void assertj_soft_assertions_try_with_resource_with_useless_assertAll() {101    try(org.assertj.core.api.AutoCloseableSoftAssertions softly = new org.assertj.core.api.AutoCloseableSoftAssertions()) {102      softly.assertThat(1).isLessThan(2);103      softly.assertAll();104    } // Noncompliant {{Add one or more 'assertThat' before the end of this try block.}}105  }106  @Test107  public void assertj_junit_soft_assertions() {108    junit_soft_assertions.assertThat(1).isLessThan(2);109  } // Compliant, no need to call "assertAll()", it will be called by the @Rule of junit_soft_assertions110}...

Source:GuavaOptionalBefore.java

1import com.google.common.base.Optional;2import static org.assertj.core.api.Assertions.assertThat;3import static org.assertj.core.api.Assertions.fail;4import static org.assertj.guava.api.Assertions.assertThat;5public class GuavaOptional {6    private void guavaOptional() {7        Optional<String> opt = Optional.absent();8        assertThat(opt.isPresent()).as("foo").isEqualTo(true);9        assertThat(opt.isPresent()).isEqualTo(Boolean.TRUE);10        assertThat(opt.isPresent()).isNotEqualTo(false);11        assertThat(opt.isPresent()).isNotEqualTo(Boolean.FALSE);12        assertThat(opt.isPresent()).isTrue();13        assertThat(opt.isPresent()).as("foo").isEqualTo(false);14        assertThat(opt.isPresent()).isEqualTo(Boolean.FALSE);15        assertThat(opt.isPresent()).isNotEqualTo(true);16        assertThat(opt.isPresent()).isNotEqualTo(Boolean.TRUE);17        assertThat(opt.isPresent()).isFalse();18        assertThat(opt.get()).as("foo").isEqualTo("foo");19        assertThat(opt.get()).isSameAs("foo");20        assertThat(opt.get()).isNotEqualTo("foo");21        assertThat(opt.get()).isNotSameAs("foo");22        assertThat(opt.orNull()).as("foo").isEqualTo(null);23        assertThat(opt.orNull()).isNull();24        assertThat(opt.orNull()).isNotEqualTo(null);25        assertThat(opt.orNull()).isNotNull();26        //assertThat(opt.get()).isEqualTo(opt.get()); // there's a better version than contains(opt.get())27        assertThat(opt.orNull()).isEqualTo(opt.get());28        //assertThat(opt.get()).isEqualTo(opt.orNull()); // there's a better version than contains(opt.orNull())29        assertThat(opt).contains(opt.get());30        assertThat(opt).contains(opt.orNull());31        String possibleNullString = System.getProperty("username");32        String notNullString = "Narf";33        assertThat(opt).as("foo").isEqualTo(Optional.of("foo"));34        assertThat(opt).isEqualTo(Optional.fromNullable("foo"));35        assertThat(opt).isEqualTo(Optional.fromNullable(null));36        assertThat(opt).isEqualTo(Optional.fromNullable(possibleNullString));37        assertThat(opt).isEqualTo(Optional.fromNullable(notNullString));38        assertThat(opt).isNotEqualTo(Optional.of("foo"));39        assertThat(opt).isNotEqualTo(Optional.fromNullable("foo"));40        assertThat(opt).isEqualTo(Optional.absent());41        assertThat(opt).isNotEqualTo(Optional.absent());42        org.assertj.guava.api.Assertions.assertThat(opt).as("foo").isEqualTo(Optional.of("foo"));43        org.assertj.guava.api.Assertions.assertThat(opt).isEqualTo(Optional.fromNullable("foo"));44        org.assertj.guava.api.Assertions.assertThat(opt).isNotEqualTo(Optional.of("foo"));45        org.assertj.guava.api.Assertions.assertThat(opt).isNotEqualTo(Optional.fromNullable("foo"));46        org.assertj.guava.api.Assertions.assertThat(opt).as("foo").isEqualTo(Optional.absent());47        org.assertj.guava.api.Assertions.assertThat(opt).isNotEqualTo(Optional.absent());48        org.assertj.core.api.Assertions.assertThat(opt).as("foo").isEqualTo(Optional.of("foo"));49        org.assertj.core.api.Assertions.assertThat(opt).isEqualTo(Optional.fromNullable("foo"));50        org.assertj.core.api.Assertions.assertThat(opt).isNotEqualTo(Optional.of("foo"));51        org.assertj.core.api.Assertions.assertThat(opt).isNotEqualTo(Optional.fromNullable("foo"));52        org.assertj.core.api.Assertions.assertThat(opt).as("foo").isEqualTo(Optional.absent());53        org.assertj.core.api.Assertions.assertThat(opt).isNotEqualTo(Optional.absent());54        assertThat(opt.isPresent()).as("foo").isEqualTo(true).as("bar").isEqualTo(Boolean.TRUE);55        assertThat(opt.isPresent()).as("foo").isEqualTo(true).as("bar").isEqualTo(Boolean.FALSE);56        assertThat(opt.orNull()).as("foo").isEqualTo(null).isNotNull();57        assertThat(Optional.of(new byte[] { 2, 3 }).get()).isEqualTo(new byte[] { 2, 3 }); // not working with assertj-guava 3.2.158        org.junit.Assert.assertThat(opt, null);59        fail("oh no!");60    }61}...

assertThat

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.Test;3public class 1 {4    public void test1() {5        Assertions.assertThat(1).isEqualTo(1);6    }7}8import org.junit.Assert;9import org.junit.Test;10public class 2 {11    public void test1() {12        Assert.assertThat(1, is(1));13    }14}

assertThat

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import org.junit.Test;3public class Test1 {4    public void test1() {5        assertThat(1).isEqualTo(1);6    }7}8import static org.junit.Assert.assertThat;9import org.hamcrest.Matchers;10import org.junit.Test;11public class Test2 {12    public void test2() {13        assertThat(1, Matchers.equalTo(1));14    }15}16import static org.hamcrest.MatcherAssert.assertThat;17import org.hamcrest.Matchers;18import org.junit.Test;19public class Test3 {20    public void test3() {21        assertThat(1, Matchers.equalTo(1));22    }23}24import static org.hamcrest.CoreMatchers.equalTo;25import static org.hamcrest.MatcherAssert.assertThat;26import org.junit.Test;27public class Test4 {28    public void test4() {29        assertThat(1, equalTo(1));30    }31}32import static org.hamcrest.Matchers.equalTo;33import static org.hamcrest.MatcherAssert.assertThat;34import org.junit.Test;35public class Test5 {36    public void test5() {37        assertThat(1, equalTo(1));38    }39}40import org.hamcrest.MatcherAssert;41import org.hamcrest.Matchers;42import org.junit.Test;43public class Test6 {44    public void test6() {45        MatcherAssert.assertThat(1, Matchers.equalTo(1));46    }47}48import org.hamcrest.CoreMatchers;49import org.hamcrest.MatcherAssert;50import org.junit.Test;51public class Test7 {52    public void test7() {53        MatcherAssert.assertThat(1, CoreMatchers.equalTo(1));54    }55}56import org.hamcrest.MatcherAssert;57import org.hamcrest.Matchers;58import org.junit.Test;59public class Test8 {60    public void test8() {

assertThat

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.Assertions.assertThatThrownBy;3import static org.assertj.core.api.Assertions.catchThrowable;4import org.junit.Test;5public class Test1 {6    public void test1() {7        assertThat(1).isEqualTo(1);8    }9    public void test2() {10        assertThatThrownBy(() -> {11            throw new RuntimeException("boom!");12        }).hasMessage("boom!");13    }14    public void test3() {15        Throwable throwable = catchThrowable(() -> {16            throw new RuntimeException("boom!");17        });18        assertThat(throwable).hasMessage("boom!");19    }20}21	at Test1.lambda$test2$0(Test1.java:10)22	at org.assertj.core.api.ThrowableAssert.catchThrowable(ThrowableAssert.java:67)23	at org.assertj.core.api.AssertionsForClassTypes.catchThrowable(AssertionsForClassTypes.java:1013)24	at Test1.test3(Test1.java:17)25	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)26	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)27	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)28	at java.lang.reflect.Method.invoke(Method.java:498)29	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)30	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)31	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)32	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)33	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)34	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)35	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)36	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:

assertThat

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import java.util.ArrayList;3import java.util.List;4import java.util.stream.Collectors;5import java.util.stream.Stream;6public class Solution {7    public static void main(String[] args) {8        List<String> myList = new ArrayList<>();9        myList.add("a1");10        myList.add("a2");11        myList.add("b1");12        myList.add("c2");13        myList.add("c1");14        System.out.println(myList);15        List<String> res = new ArrayList<>();16        res = myList.stream()17                .filter(s -> s.startsWith("c"))18                .map(String::toUpperCase)19                .sorted()20                .collect(Collectors.toList());21        System.out.println(res);22        assertThat(res).containsExactly("C1", "C2");23    }24}

assertThat

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import org.junit.Test;3public class AssertThatTest {4    public void testAssertThat() {5        String message = "Hello World";6        assertThat(message).isEqualTo("Hello World");7    }8}9at org.junit.Assert.assertEquals(Assert.java:115)10at org.junit.Assert.assertEquals(Assert.java:144)11at AssertThatTest.testAssertThat(AssertThatTest.java:10)12assertThat(String actual)13assertThat(String actual, Condition<? super String> condition)14assertThat(String actual, Matcher<? super String> matcher)15assertThat(String actual, String expected)16assertThat(String actual, String expected, String reason)17assertThat(String actual, String expected, String reason, Object... args)18assertThat(String actual, String expected, String reason, Object arg1, Object arg2)19assertThat(String actual, String expected, String reason, Object arg1, Object arg2, Object arg3)20assertThat(String actual, String expected, String reason, Object arg1, Object arg2, Object arg3, Object arg4)21assertThat(String actual, String expected, String reason, Object arg1, Object arg2, Object arg3, Object arg4, Object arg5)22assertThat(String actual, String expected, String reason, Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6)23assertThat(String actual, String expected, String reason, Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7)24assertThat(String actual, String expected, String reason, Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7, Object arg8)25assertThat(String actual, String expected, String reason, Object arg1,

assertThat

Using AI Code Generation

1import org.junit.Test;2import static org.assertj.core.api.Assertions.assertThat;3public class AssertjTest {4    public void testAssertj() {5        assertThat(1).isEqualTo(1);6    }7}8import org.junit.Test;9import static org.hamcrest.MatcherAssert.assertThat;10import static org.hamcrest.Matchers.equalTo;11public class HamcrestTest {12    public void testHamcrest() {13        assertThat(1, equalTo(1));14    }15}16import org.junit.Test;17import static org.junit.Assert.assertThat;18import static org.hamcrest.Matchers.equalTo;19public class JunitTest {20    public void testJunit() {21        assertThat(1, equalTo(1));22    }23}24import org.junit.Test;25import static org.junit.Assert.assertThat;26import static org.hamcrest.Matchers.equalTo;27public class JunitTest {28    public void testJunit() {29        assertThat(1, equalTo(1));30    }31}32import org.junit.Test;33import static org.junit.Assert.assertThat;34import static org.hamcrest.Matchers.equalTo;35public class JunitTest {36    public void testJunit() {37        assertThat(1, equalTo(1));38    }39}40import org.junit.Test;41import static org.junit.Assert.assertThat;42import static org.hamcrest.Matchers.equalTo;43public class JunitTest {44    public void testJunit() {45        assertThat(1, equalTo(1));46    }47}48import org.junit.Test;49import static org.junit.Assert.assertThat;50import static org.hamcrest.Matchers.equalTo;51public class JunitTest {52    public void testJunit() {53        assertThat(1, equalTo(1));54    }55}56import org.junit.Test;57import static org.junit.Assert.assertThat;58import static org.hamcrest.Matchers.equalTo;59public class JunitTest {

assertThat

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2public class AssertJExample {3    public static void main(String[] args) {4        String str = "junit";5        assertThat(str).isEqualTo("junit");6        assertThat(str).contains("nit");7        assertThat(str).startsWith("j");8    }9}10import static org.hamcrest.Matchers.equalTo;11import static org.hamcrest.Matchers.is;12import static org.hamcrest.MatcherAssert.assertThat;13public class HamcrestExample {14    public static void main(String[] args) {15        String str = "junit";16        assertThat(str, is(equalTo("junit")));17        assertThat(str, is(equalTo("junit")));18        assertThat(str, is(equalTo("junit")));19    }20}

assertThat

Using AI Code Generation

1package com.automationrhapsody.junit5;2import org.junit.jupiter.api.Test;3import static org.assertj.core.api.Assertions.assertThat;4public class JUnit5AssertThatExample {5    public void assertThatTest() {6        assertThat("Hello World").isEqualTo("Hello World");7    }8}9package com.automationrhapsody.junit5;10import org.junit.jupiter.api.Test;11import static org.hamcrest.MatcherAssert.assertThat;12import static org.hamcrest.Matchers.equalTo;13public class JUnit5HamcrestAssertThatExample {14    public void assertThatTest() {15        assertThat("Hello World", equalTo("Hello World"));16    }17}

assertThat

Using AI Code Generation

1import org.junit.Test;2import static org.assertj.core.api.Assertions.assertThat;3public class AssertThatDemo {4  public void testAssertThat() {5    String str1 = "Junit is working fine";6    String str2 = "Junit is working fine";7    assertThat(str1).isEqualTo(str2);8  }9}103. org.junit.Assert.assertArrayEquals() method11import org.junit.Test;12import static org.junit.Assert.assertArrayEquals;13public class AssertArrayEqualsDemo {14  public void testAssertArrayEquals() {15    byte[] expected = "trial".getBytes();16    byte[] actual = "trial".getBytes();17    assertArrayEquals("failure - byte arrays not same", expected, actual);18  }19}204. org.junit.Assert.assertSame() method21import org.junit.Test;22import static org.junit.Assert.assertSame;23public class AssertSameDemo {24  public void testAssertSame() {25    String str1 = new String("abc");

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