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

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

Source:AssertjTest.java

...7import java.util.List;8import java.util.Map;9import static org.assertj.core.api.Assertions.as;10import static org.assertj.core.api.Assertions.assertThat;11import static org.assertj.core.api.AssertionsForClassTypes.assertThatThrownBy;12public class AssertjTest {13    // assert string14    @Test15    void test_string_ok() {16        String name = "I am Mkyong!";17        assertThat(name)18                .as("if failed display this msg!")19                .isEqualTo("I am Mkyong!")20                .isEqualToIgnoringCase("I AM mkyong!")21                .startsWith("I")22                .endsWith("!")23                .containsIgnoringCase("mkyong");24    }25    // assert list26    @Test27    void test_list_ok() {28        List<String> list = Arrays.asList("Java", "Rust", "Clojure");29        assertThat(list)30                .hasSize(3)31                .contains("Java", "Clojure")32                .contains("Java", Index.atIndex(0))33                .contains("Rust", Index.atIndex(1))34                .contains("Clojure", Index.atIndex(2))35                .doesNotContain("Node JS");36    }37    // assert map38    @Test39    void test_map_ok() {40        Map<String, Object> map = new HashMap<>();41        map.put("name", "mkyong");42        assertThat(map)43                .hasSize(1)44                .extractingByKey("name", as(InstanceOfAssertFactories.STRING))45                .isEqualToIgnoringCase("mkyong")46                .startsWith("mkyong");47        assertThat(map).extracting("name")48                .isEqualTo("mkyong");49        Map<String, Object> map2 = new HashMap<>();50        map2.put("number", 999);51        assertThat(map2)52                .hasSize(1)53                .extractingByKey("number", as(InstanceOfAssertFactories.INTEGER))54                .isEqualTo(999);55    }56    // assert exception57    @Test58    void test_exception_ok() {59        assertThatThrownBy(() -> divide(1, 0))60                .isInstanceOf(ArithmeticException.class)61                .hasMessageContaining("zero")62                .hasMessage("/ by zero");63        assertThatThrownBy(() -> {64            List<String> list = Arrays.asList("one", "two");65            list.get(2);66        })67                .isInstanceOf(IndexOutOfBoundsException.class)68                .hasMessageContaining("Index 2 out of bounds");69    }70    int divide(int input, int divide) {71        return input / divide;72    }73}...

Source:Java8StyleAssertions.java

1package com.baeldung.assertj.exceptions;2import static org.assertj.core.api.Assertions.assertThatThrownBy;3import static org.assertj.core.api.Assertions.assertThat;4import static org.assertj.core.api.Assertions.assertThatExceptionOfType;5import static org.assertj.core.api.Assertions.catchThrowable;6import java.io.IOException;7import java.util.ArrayList;8import java.util.Arrays;9import org.junit.Test;10public class Java8StyleAssertions {11    @Test12    public void whenGettingOutOfBoundsItem_thenIndexOutOfBoundsException() {13        assertThatThrownBy(() -> {14            ArrayList<String> myStringList = new ArrayList<String>(Arrays.asList("Strine one", "String two"));15            myStringList.get(2);16        }).isInstanceOf(IndexOutOfBoundsException.class)17            .hasMessageStartingWith("Index: 2")18            .hasMessageContaining("2")19            .hasMessageEndingWith("Size: 2")20            .hasMessageContaining("Index: 2, Size: 2")21            .hasMessage("Index: %s, Size: %s", 2, 2)22            .hasMessageMatching("Index: \\d+, Size: \\d+")23            .hasNoCause();24    }25    @Test26    public void whenWrappingException_thenCauseInstanceOfWrappedExceptionType() {27        assertThatThrownBy(() -> {28            try {29                throw new IOException();30            } catch (IOException e) {31                throw new RuntimeException(e);32            }33        }).isInstanceOf(RuntimeException.class)34            .hasCauseInstanceOf(IOException.class)35            .hasStackTraceContaining("IOException");36    }37    @Test38    public void whenDividingByZero_thenArithmeticException() {39        assertThatExceptionOfType(ArithmeticException.class).isThrownBy(() -> {40            int numerator = 10;41            int denominator = 0;...

Source:BaseFridgeShelfTest.java

...5import org.junit.jupiter.api.Test;6import static ar.net.mgardos.vsfridge.core.component.base.BaseSensors.INVALID_SENSORS_QUANTITY;7import static ar.net.mgardos.vsfridge.core.component.base.BaseSensors.UNABLE_TO_ADD_SENSOR;8import static org.assertj.core.api.Assertions.assertThat;9import static org.assertj.core.api.Assertions.assertThatThrownBy;10class BaseFridgeShelfTest {11	private FridgeShelf fridgeShelf;12	@BeforeEach13	void setUp() {14	}15	@Test16	public void testCreateDefaultShelf() {17		fridgeShelf = new BaseFridgeShelf();18		assertThat(fridgeShelf.hasSensors()).isFalse();19		assertThat(fridgeShelf.hasCapacityForSensors()).isTrue();20	}21	@Test22	public void testCreateShelfForNoSensors() {23		fridgeShelf = new BaseFridgeShelf(0);24		assertThat(fridgeShelf.hasCapacityForSensors()).isFalse();25		assertThat(fridgeShelf.hasSensors()).isFalse();26	}27	@Test28	public void testCreateShelfWithInvalidQuantity() {29		SoftAssertions assertions = new SoftAssertions();30		assertions.assertThatThrownBy(() -> new BaseFridgeShelf(null)).isInstanceOf(NullPointerException.class)31		          .hasMessage(INVALID_SENSORS_QUANTITY);32		assertions.assertThatThrownBy(() -> new BaseFridgeShelf(-1)).isInstanceOf(IllegalArgumentException.class)33		          .hasMessage(INVALID_SENSORS_QUANTITY);34		assertions.assertAll();35	}36	@Test37	public void testAddSensorWithInvalidSensor() {38		fridgeShelf = new BaseFridgeShelf(1);39		assertThatThrownBy(() -> fridgeShelf.addSensor(null)).isInstanceOf(NullPointerException.class)40		                                                     .hasMessage(UNABLE_TO_ADD_SENSOR);41	}42}

assertThatThrownBy

Using AI Code Generation

1package com.ack.junit.assertj;2import org.junit.Test;3import static org.assertj.core.api.Assertions.assertThatThrownBy;4public class AssertJExceptionTest {5  public void testAssertJException() {6    assertThatThrownBy( () -> { throw new Exception( "expected exception" ); } )7        .isInstanceOf( Exception.class )8        .hasMessage( "expected exception" );9  }10}

assertThatThrownBy

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThatThrownBy;2public class 1 {3    public static void main(String[] args) {4        assertThatThrownBy(() -> {5            throw new Exception("error");6        }).isInstanceOf(Exception.class);7    }8}

assertThatThrownBy

Using AI Code Generation

1import org.junit.Test;2import static org.assertj.core.api.Assertions.*;3public class 1 {4    public void test() {5        assertThatThrownBy(() -> {6        }).isInstanceOf(Exception.class)7          .hasMessageContaining("message")8          .hasMessageStartingWith("message")9          .hasMessageEndingWith("message")10          .hasMessageMatching("message")11          .hasMessageMatching("message")12          .hasCauseInstanceOf(Exception.class)13          .hasCauseMessageContaining("message")14          .hasCauseMessageStartingWith("message")15          .hasCauseMessageEndingWith("message")16          .hasCauseMessageMatching("message")17          .hasNoCause();18    }19}20Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:6)21Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:7)22Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:8)23Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:9)24Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:10)25Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:11)26Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:12)27Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:13)28Exception in thread "main" org.junit.ComparisonFailure: expected:<...e[Exception] but was:<...e[AssertionError]> at 1.test(1.java:14)

assertThatThrownBy

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import static org.assertj.core.api.Assertions.assertThatThrownBy;3public class 1 {4    void test() {5        assertThatThrownBy(() -> {6            throw new RuntimeException("boom!");7        }).isInstanceOf(RuntimeException.class)8                .hasMessageContaining("boom");9    }10}11import org.junit.jupiter.api.Test;12import static org.assertj.core.api.Assertions.assertThatExceptionOfType;13public class 2 {14    void test() {15        assertThatExceptionOfType(RuntimeException.class)16                .isThrownBy(() -> {17                    throw new RuntimeException("boom!");18                }).withMessageContaining("boom");19    }20}21import org.junit.jupiter.api.Test;22import static org.junit.jupiter.api.Assertions.assertThrows;23public class 3 {24    void test() {25        Exception exception = assertThrows(RuntimeException.class, () -> {26            throw new RuntimeException("boom!");27        });28        String expectedMessage = "boom!";29        String actualMessage = exception.getMessage();30        assertTrue(actualMessage.contains(expectedMessage));31    }32}33import org.junit.jupiter.api.Test;34import static org.junit.jupiter.api.Assertions.assertThrows;35public class 4 {36    void test() {37        Exception exception = assertThrows(RuntimeException.class, () -> {38            throw new RuntimeException("boom!");39        });40        String expectedMessage = "boom!";41        String actualMessage = exception.getMessage();42        assertTrue(actualMessage.contains(expectedMessage));43    }44}45import org.junit.jupiter.api.Test;46import static org.junit.jupiter.api.Assertions.assertThrows;47public class 5 {48    void test() {49        Exception exception = assertThrows(RuntimeException.class, () -> {50            throw new RuntimeException("boom!");51        });52        String expectedMessage = "boom!";53        String actualMessage = exception.getMessage();54        assertTrue(actualMessage.contains(expectedMessage));55    }56}57import org.junit.jupiter.api.Test;58import static org.junit.jupiter.api.Assertions.assertThrows

assertThatThrownBy

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.Test;3import java.io.IOException;4public class Test1 {5    public void test1() {6        Assertions.assertThatThrownBy(() -> {7            throw new IOException("test");8        }).isInstanceOf(IOException.class).hasMessage("test");9    }10}

assertThatThrownBy

Using AI Code Generation

1import org.junit.Test;2import static org.assertj.core.api.Assertions.assertThatThrownBy;3public class AssertionsDemo {4	public void testAssertThatThrownBy() {5		assertThatThrownBy(() -> {6			throw new IllegalArgumentException("a message");7		}).isInstanceOf(IllegalArgumentException.class)8		.hasMessage("a message");9	}10}11	at org.assertj.core.api.Assertions.fail(Assertions.java:1293)12	at org.assertj.core.api.Assertions.assertThatThrownBy(Assertions.java:1247)13	at AssertionsDemo.testAssertThatThrownBy(AssertionsDemo.java:13)14Example 2: Using assertThatThrownBy() method to check a particular exception is thrown or not15import org.junit.Test;16import static org.assertj.core.api.Assertions.assertThatThrownBy;17public class AssertionsDemo {18	public void testAssertThatThrownBy() {19		assertThatThrownBy(() -> {20			throw new IllegalArgumentException("a message");21		}).isInstanceOf(IllegalArgumentException.class)22		.hasMessage("a message");23	}24}25	at org.assertj.core.api.Assertions.fail(Assertions.java:1293)26	at org.assertj.core.api.Assertions.assertThatThrownBy(Assertions.java:1247)27	at AssertionsDemo.testAssertThatThrownBy(AssertionsDemo.java:13)28The exception is thrown by assertThatThrownBy() method

assertThatThrownBy

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import static org.assertj.core.api.Assertions.assertThatThrownBy;3public class 1 {4    void test() {5        assertThatThrownBy(() -> {6            throw new RuntimeException("boom!");7        }).isInstanceOf(RuntimeException.class)8                .hasMessageContaining("boom");9    }10}11import org.junit.jupiter.api.Test;12import static org.assertj.core.api.Assertions.assertThatExceptionOfType;13public class 2 {14    void test() {15        assertThatExceptionOfType(RuntimeException.class)16                .isThrownBy(() -> {17                    throw new RuntimeException("boom!");18                }).withMessageContaining("boom");19    }20}21import org.junit.jupiter.api.Test;22import static org.junit.jupiter.api.Assertions.assertThrows;23public class 3 {24    void test() {25        Exception exception = assertThrows(RuntimeException.class, () -> {26            throw new RuntimeException("boom!");27        });28        String expectedMessage = "boom!";29        String actualMessage = exception.getMessage();30        assertTrue(actualMessage.contains(expectedMessage));31    }32}33import org.junit.jupiter.api.Test;34import static org.junit.jupiter.api.Assertions.assertThrows;35public class 4 {36    void test() {37        Exception exception = assertThrows(RuntimeException.class, () -> {38            throw new RuntimeException("boom!");39        });40        String expectedMessage = "boom!";41        String actualMessage = exception.getMessage();42        assertTrue(actualMessage.contains(expectedMessage));43    }44}45import org.junit.jupiter.api.Test;46import static org.junit.jupiter.api.Assertions.assertThrows;47public class 5 {48    void test() {49        Exception exception = assertThrows(RuntimeException.class, () -> {50            throw new RuntimeException("boom!");51        });52        String expectedMessage = "boom!";53        String actualMessage = exception.getMessage();54        assertTrue(actualMessage.contains(expectedMessage));55    }56}57import org.junit.jupiter.api.Test;58import static org.junit.jupiter.api.Assertions.assertThrows

assertThatThrownBy

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.Test;3import java.io.IOException;4public class Test1 {5    public void test1() {6        Assertions.assertThatThrownBy(() -> {7            throw new IOException("test");8        }).isInstanceOf(IOException.class).hasMessage("test");9    }10}

assertThatThrownBy

Using AI Code Generation

1import org.junit.Test;2import static org.assertj.core.api.Assertions.*;3import java.io.IOException;4public class AssertJTest {5    public void test() {6        assertThatThrownBy(() -> {7            throw new IOException("Exception thrown");8        }).isInstanceOf(IOException.class).hasMessage("Exception thrown");9    }10}

assertThatThrownBy

Using AI Code Generation

1import java.util.*;2import org.junit.*;3import static org.assertj.core.api.Assertions.*;4public class 1 {5   public void testAssertThatThrownBy() {6      assertThatThrownBy(() -> { throw new Exception("An error occurred"); }).hasMessage("An error occurred");7   }8}9	at org.junit.Assert.assertEquals(Assert.java:115)10	at org.junit.Assert.assertEquals(Assert.java:144)11	at org.junit.Assert.assertEquals(Assert.java:155)12	at 1.testAssertThatThrownBy(1.java:8)13assertThatThrownBy() method14The assertThatThrownBy() method checks whether the exception thrown by

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