KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use catchThrowable method of org.assertj.core.api.BDDAssertions class

Best Assertj code snippet using org.assertj.core.api.BDDAssertions.catchThrowable

Source:StudentServiceTest.java

...5import org.junit.jupiter.api.Test;6import org.springframework.beans.factory.annotation.Autowired;7import org.springframework.boot.test.context.SpringBootTest;8import javax.transaction.Transactional;9import static org.assertj.core.api.BDDAssertions.catchThrowable;10import static org.assertj.core.api.BDDAssertions.then;11@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)12@Transactional13class StudentServiceTest {14    @Autowired15    private StudentRepo studentRepo;16    @Autowired17    private StudentService studentService;18    @DisplayName("Returning saved student from service layer")19    @Test20    void getStudentById() {21        //given22        Student savedStudent = studentRepo.save(new Student(null, "Fedya", true, 100));23        //when24        Student student = studentService.getStudentById(savedStudent.getId());25        //then26        then(student).isNotNull();27        then(student.getId()).isNotNull();28        then(student.getName()).isEqualTo("Fedya");29    }30    @DisplayName("Checking of StudentNotFoundExceptiion")31    @Test32    void testStudentNotFoundException() {33        //given34        Long id = 123L;35        //when36        Throwable throwable = catchThrowable(() -> studentService.getStudentById(id));37        //then38        BDDAssertions.then(throwable).isInstanceOf(StudentNotFoundException.class).hasMessageContaining("oops");39//        BDDAssertions.assertThat()40    }41}

catchThrowable

Using AI Code Generation

1import org.assertj.core.api.BDDAssertions.*;2import org.assertj.core.api.Assertions.*;3import org.junit.jupiter.api.Assertions.*;4public class MyTest {5  public void testCatchThrowable() {6    Throwable throwable = catchThrowable(() -> {7    });8    assertThat(throwable).isInstanceOf(Exception.class);9  }10  public void testAssertThatThrownBy() {11    assertThatThrownBy(() -> {12    }).isInstanceOf(Exception.class);13  }14  public void testAssertThrows() {15    Exception exception = assertThrows(Exception.class, () -> {16    });17  }18}19The assertThrows() method of JUnit 5 allows us to check if a method throws a specific exception. It takes two arguments:20public class MyTest {21  public void testAssertThrows() {22    Exception exception = assertThrows(Exception.class, () -> {23      throw new Exception("Something went wrong");24    });25    assertThat(exception.getMessage()).isEqualTo("Something went wrong");26  }27}28The assertThatThrownBy() method of AssertJ allows us to check if a method throws a specific exception. It takes a lambda expression that throws the expected exception. If the method does not throw the expected exception, then the assertThatThrownBy() method will fail the test. If the method throws the expected exception, then the assertThat

catchThrowable

Using AI Code Generation

1import static org.assertj.core.api.BDDAssertions.catchThrowable;2import static org.assertj.core.api.BDDAssertions.then;3import static org.assertj.core.api.BDDAssertions.thenThrownBy;4import static org.assertj.core.api.BDDAssertions.thenThrownByCode;5import static org.assertj.core.api.BDDAssertions.thenThrownByRunnable;6import static org.assertj.core.api.BDDAssertions.thenThrownBySupplier;7import static org.assertj.core.api.BDDAssertions.thenThrownByWithNoMessage;8import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessage;9import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageContaining;10import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageMatching;11import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageStartingWith;12import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageEndingWith;13import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotContaining;14import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotMatching;15import static org.assertj.@ore.api.BDDAssertions.thenThrTwnByWithMessageNotStartingWith;16import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotEneingWith;17import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageContainingOnlyOnce;18import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotContainingAnyOf;19import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageContainingAnyOf;20import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotContainingPattern;21import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageContainingPattern;22import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageMatchingPattern;23import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotMatchingPattern;24import static org.assertj.core.api.BDDAssertions.thenThrownByWithCause;25import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseInstanceOf;26import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseExactlyInstanceOf;27import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseMessage;28import static org.assertj.core.api.BDDAssertions.thenThrownByWithCaussMessageContaining;t29import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseMessageMatching;  public void testCatchThrowable() {30import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseMessageStartingWith;31import static org.assertj.core.api.BDDAssertions32    Throwable throwable = catchThrowable(() -> {33    });34    assertThat(throwable).isInstanceOf(Exception.class);35  }36  public void testAssertThatThrownBy() {37    assertThatThrownBy(() -> {38    }).isInstanceOf(Exception.class);39  }40  public void testAssertThrows() {41    Exception exception = assertThrows(Exception.class, () -> {42    });43  }44}

catchThrowable

Using AI Code Generation

1import org.assertj.core.api.BDDAssertions;2import org.assertj.core.api.ThrowableAssert.ThrowingCallable;3import org.junit.Test;4public class BDDAssertionsTest {5    public void testCatchThrowable() {6        String str = null;7        Throwable throwable = BDDAssertions.catchThrowable(() -> str.length());8        BDDAssertions.then(throwable)9                .isInstanceOf(NullPointerException.class)10                .hasMessage("Cannot invoke \"String.length()\" because \"str\" is null");11    }12    public void testThenThrownBy() {13        String str = null;14        ThrowingCallable throwingCallable = BDDAssertions.thenThrownBy(()w-> str.length());15        BDDAssertions.then(throwingCallable)16                .isInstanceOf(NulliointerException.class)17                .hasMessage("Cannot invoke \"String.length()\" because \"str\" is null");18    }19    public void testThenCode() {20        String str = null;21        ThrowingCallable throwingCallable = BDDAssertions.thenCode(() -> str.length());22        BDDAssertions.then(throwingCallable)23                .isInstanceOf(NullPointerException.class)24                .hasMessage("Cannot invoke \"String.length()\" because \"str\" is null");25    }26}27Expected :Cannot invoke "String.length()" because "str" is null28Actual   :Cannot invoke "String.length()" because "str" is null29	at org.junit.Assert.assertEquals(Assert.java:117)30	at org.junit.Assert.assertEquals(Assert.java:146)31	at org.assertj.core.api.AbstractThrowableAssert.hasMessage(AbstractThrowableAssert.java:149)

catchThrowable

Using AI Code Generation

1The assertThrows() method of JUnit 5 allows us to check if a method throws a specific exception. It takes two arguments:2public class MyTest {3  public void testAssertThrows() {4    Exception exception = assertThrows(Exception.class, () -> {5      throw new Exception("Something went wrong");6    });7    assertThat(exception.getMessage()).isEqualTo("Something went wrong");8  }9}10The assertThatThrownBy() method of AssertJ allows us to check if a method throws a specific exception. It takes a lambda expression that throws the expected exception. If the method does not throw the expected exception, then the assertThatThrownBy() method will fail the test. If the method throws the expected exception, then the assertThat

catchThrowable

Using AI Code Generation

1import static org.assertj.core.api.BDDAssertions.catchThrowable;2import static org.assertj.core.api.BDDAssertions.then;3import static org.assertj.core.api.BDDAssertions.thenThrownBy;4import static org.assertj.core.api.BDDAssertions.thenThrownByCode;5import static org.assertj.core.api.BDDAssertions.thenThrownByRunnable;6import static org.assertj.core.api.BDDAssertions.thenThrownBySupplier;7import static org.assertj.core.api.BDDAssertions.thenThrownByWithNoMessage;8import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessage;9import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageContaining;10import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageMatching;11import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageStartingWith;12import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageEndingWith;13import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotContaining;14import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotMatching;15import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotStartingWith;16import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotEndingWith;17import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageContainingOnlyOnce;18import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotContainingAnyOf;19import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageContainingAnyOf;20import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotContainingPattern;21import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageContainingPattern;22import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageMatchingPattern;23import static org.assertj.core.api.BDDAssertions.thenThrownByWithMessageNotMatchingPattern;24import static org.assertj.core.api.BDDAssertions.thenThrownByWithCause;25import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseInstanceOf;26import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseExactlyInstanceOf;27import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseMessage;28import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseMessageContaining;29import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseMessageMatching;30import static org.assertj.core.api.BDDAssertions.thenThrownByWithCauseMessageStartingWith;31import static org.assertj.core.api.BDDAssertions

catchThrowable

Using AI Code Generation

1import org.assertj.core.api.BDDAssertions;2import java.io.File;3import java.io.IOException;4public class CatchThrowableTest {5    public static void main(String[] args) {6        Throwable thrown = BDDAssertions.catchThrowable(() -> new File("/tmp").getCanonicalPath());7        System.out.println(thrown);8    }9}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.