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How to use Assertions class of org.assertj.core.api package

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

Source:AssertionsCompletenessCheck.java

...4import org.mockito.Mockito;5import com.google.common.truth.Truth;6import java.util.Comparator;7import java.util.List;8public class AssertionsCompletenessCheck {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}...

Assertions

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.Assertions.fail;3import static org.assertj.core.api.Assertions.failBecauseExceptionWasNotThrown;4import org.junit.Test;5public class AssertJTest {6   public void testAssertJ() {7      assertThat("Hello").isEqualTo("Hello");8      assertThat("Hello").isNotEqualTo("hello");9      assertThat(2+2).isBetween(3, 5);10      assertThat(2+2).isNotBetween(5, 7);11      assertThat(2+2).isGreaterThan(3);12      assertThat(2+2).isGreaterThanOrEqualTo(4);13      assertThat(2+2).isLessThan(5);14      assertThat(2+2).isLessThanOrEqualTo(4);15      assertThat(2+2).isIn(3, 4, 5);16      assertThat(2+2).isNotIn(5, 6, 7);17      assertThat(2+2).isNotNull();18      assertThat(2+2).isNotEqualTo(5);19      assertThat(2+2).isNotSameAs(5);20      assertThat(2+2).isSameAs(4);21      assertThat(2+2).isInstanceOf(Integer.class);22      assertThat(2+2).isNotInstanceOf(String.class);23      assertThat(2+2).isNull();24      assertThat(2+2).isZero();25      assertThat(2+2).isNotZero();26      assertThat(2+2).isEqualTo(4);27      assertThat(2+2).isNotEqualTo(5);28      assertThat(2+2).isPositive();29      assertThat(2+2).isNegative();30      assertThat(2+2).isNotNegative();31      assertThat(2+2).isNotPositive();32      assertThat(2+2).isNotZero();33      assertThat(2+2).isZero();34      assertThat(2+2).isCloseTo(4.1, 0.5);35      assertThat(2+2).isNotCloseTo(4.1, 0.1);36      assertThat(2+2).isCloseTo(4.1, 0.5);37      assertThat(2+2).isNotCloseTo(4.1, 0.1);38      assertThat(2+2).isCloseTo(4.1, 0.5);

Assertions

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.Test;3public class AssertionsTest {4    public void testAssertions() {5        int val1 = 5;6        int val2 = 6;7        Assertions.assertThat(val1).isLessThan(val2);8    }9}10	at org.junit.Assert.assertThat(Assert.java:780)11	at org.junit.Assert.assertThat(Assert.java:738)12	at org.junit.Assert$assertThat.call(Unknown Source)13	at AssertionsTest.testAssertions(AssertionsTest.groovy:9)

Assertions

Using AI Code Generation

1import static org.assertj.core.api.Assertions.*;2import static org.testng.Assert.*;3import static org.hamcrest.MatcherAssert.assertThat;4import static org.hamcrest.Matchers.*;5import org.testng.annotations.Test;6public class AssertionExamples {7	public void testAssertTrue() {8		assertTrue("Error message when assertion fails", 1 == 1);9	}10	public void testAssertFalse() {11		assertFalse("Error message when assertion fails", 1 == 2);12	}13	public void testAssertEquals() {14		assertEquals("Error message when assertion fails", 1, 1);15	}16	public void testAssertEqualsWithMessage() {17		assertEquals("Error message when assertion fails", 1, 1, "Error message when assertion fails");18	}19	public void testAssertEqualsWithDelta() {20		assertEquals("Error message when assertion fails", 1.1, 1.0, 0.01);21	}22	public void testAssertEqualsWithDeltaAndMessage() {23		assertEquals("Error message when assertion fails", 1.1, 1.0, 0.01, "Error message when assertion fails");24	}25	public void testAssertNull() {26		assertNull("Error message when assertion fails", null);27	}28	public void testAssertNotNull() {29		assertNotNull("Error message when assertion fails", "abc");30	}31	public void testAssertSame() {32		Integer aNumber = Integer.valueOf(768);33		assertSame("Error message when assertion fails", aNumber, aNumber);34	}35	public void testAssertNotSame() {36		Integer aNumber = Integer.valueOf(768);37		Integer anotherNumber = Integer.valueOf(768);38		assertNotSame("Error message when assertion fails", aNumber, anotherNumber);39	}40	public void testAssertThatBothContainsString() {41		assertThat("albumen", both(containsString("a")).and(containsString("b")));42	}43	public void testAssertThatHasItems() {44		assertThat(Arrays.asList("one", "two", "three"), hasItems("one", "three"));45	}46	public void testAssertThatEveryItemContainsString() {47		assertThat(Arrays.asList(new String[] { "fun", "ban", "

Assertions

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.Assertions.assertThatThrownBy;3import org.junit.Test;4public class AssertJTest {5	public void testAssertThat() {6		assertThat("Hello").isEqualTo("Hello");7		assertThat("Hello").isNotEqualTo("World");8		assertThat("Hello").contains("ll");9		assertThat("Hello").startsWith("He");10		assertThat("Hello").endsWith("lo");11		assertThat("Hello").isNotEmpty();12		assertThat("Hello").isNotNull();13		assertThat("Hello").isInstanceOf(String.class);14		assertThat("Hello").isNotInstanceOf(Integer.class);15		assertThat("Hello").isIn("Hello", "World");16		assertThat("Hello").isNotIn("Hello", "World");17		assertThat("Hello").matches(".*");18		assertThat("Hello").doesNotMatch(".*");19		assertThat("Hello").isNotBlank();20		assertThat("Hello").hasSize(5);21		assertThat("Hello").hasSameSizeAs("World");22		assertThat("Hello").hasSizeGreaterThan(4);23		assertThat("Hello").hasSizeGreaterThanOrEqualTo(5);24		assertThat("Hello").hasSizeLessThan(6);25		assertThat("Hello").hasSizeLessThanOrEqualTo(5);26		assertThat("Hello").isBetween("A", "Z");27		assertThat("Hello").isNotBetween("A", "Z");28		assertThat("Hello").isIn("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z");29		assertThat("Hello").isNotIn("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z");30		assertThat("Hello").isIn("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O

Assertions

Using AI Code Generation

1Assertions.assertThat(1).isEqualTo(2);2assertThat(1, is(2));3assertEquals(1, 2);4Assert.assertEquals(1, 2);5assertThat(1).isEqualTo(2);6Assertions.assertThat(1).isEqualTo(2);7assertEquals(1, 2);8Assert.assertEquals(1, 2);9assertThat(1).isEqualTo(2);10assertThat(1, is(2));11Assertions.assertThat(1).isEqualTo(2);12assertEquals(1, 2);13Assert.assertEquals(1, 2);14assertThat(1).isEqualTo(2);15assertThat(1, is(2));16Assertions.assertThat(1).isEqualTo(2);17assertEquals(1, 2);18Assert.assertEquals(1, 2);19assertThat(1).isEqualTo(2);20assertThat(1, is(2));

Assertions

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.jupiter.api.Test;3public class AssertionsTest {4    void testAdult() {5        Person person = new Person("John", 20);6        Assertions.assertThat(person.getAge()).isGreaterThanOrEqualTo(18);7    }8    void testNotAdult() {9        Person person = new Person("John", 17);10        Assertions.assertThat(person.getAge()).isLessThan(18);11    }12    private class Person {13        private String name;14        private int age;15        public Person(String name, int age) {16            this.name = name;17            this.age = age;18        }19        public int getAge() {20            return age;21        }22    }23}24import org.junit.jupiter.api.Assertions;25import org.junit.jupiter.api.Test;26public class JUnit5AssertionsTest {27    void testAdult() {28        Person person = new Person("John", 20);29        Assertions.assertTrue(person.getAge() >= 18);30    }31    void testNotAdult() {32        Person person = new Person("John", 17);33        Assertions.assertTrue(person.getAge() < 18);34    }35    private class Person {36        private String name;37        private int age;38        public Person(String name, int age) {39            this.name = name;40            this.age = age;41        }42        public int getAge() {43            return age;44        }45    }46}47import org.hamcrest.MatcherAssert;48import org.hamcrest.Matchers;49import org.junit.jupiter.api.Test;50public class HamcrestMatchersTest {51    void testAdult() {52        Person person = new Person("John", 20);53        MatcherAssert.assertThat(person.getAge(),

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