67 lines
2.2 KiB
Java
67 lines
2.2 KiB
Java
package com.baeldung.assertj.exceptions;
|
|
|
|
import static org.assertj.core.api.Assertions.assertThatThrownBy;
|
|
import static org.assertj.core.api.Assertions.assertThat;
|
|
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
|
|
import static org.assertj.core.api.Assertions.catchThrowable;
|
|
|
|
import java.io.IOException;
|
|
import java.util.ArrayList;
|
|
import java.util.Arrays;
|
|
import org.junit.Test;
|
|
|
|
public class Java8StyleAssertions {
|
|
|
|
@Test
|
|
public void whenGettingOutOfBoundsItem_thenIndexOutOfBoundsException() {
|
|
assertThatThrownBy(() -> {
|
|
ArrayList<String> myStringList = new ArrayList<String>(Arrays.asList("Strine one", "String two"));
|
|
myStringList.get(2);
|
|
}).isInstanceOf(IndexOutOfBoundsException.class)
|
|
.hasMessageStartingWith("Index: 2")
|
|
.hasMessageContaining("2")
|
|
.hasMessageEndingWith("Size: 2")
|
|
.hasMessageContaining("Index: 2, Size: 2")
|
|
.hasMessage("Index: %s, Size: %s", 2, 2)
|
|
.hasMessageMatching("Index: \\d+, Size: \\d+")
|
|
.hasNoCause();
|
|
}
|
|
|
|
@Test
|
|
public void whenWrappingException_thenCauseInstanceOfWrappedExceptionType() {
|
|
assertThatThrownBy(() -> {
|
|
try {
|
|
throw new IOException();
|
|
} catch (IOException e) {
|
|
throw new RuntimeException(e);
|
|
}
|
|
}).isInstanceOf(RuntimeException.class)
|
|
.hasCauseInstanceOf(IOException.class)
|
|
.hasStackTraceContaining("IOException");
|
|
}
|
|
|
|
@Test
|
|
public void whenDividingByZero_thenArithmeticException() {
|
|
assertThatExceptionOfType(ArithmeticException.class).isThrownBy(() -> {
|
|
int numerator = 10;
|
|
int denominator = 0;
|
|
int quotient = numerator / denominator;
|
|
})
|
|
.withMessageContaining("/ by zero");
|
|
|
|
// Alternatively:
|
|
|
|
// when
|
|
Throwable thrown = catchThrowable(() -> {
|
|
int numerator = 10;
|
|
int denominator = 0;
|
|
int quotient = numerator / denominator;
|
|
});
|
|
|
|
// then
|
|
assertThat(thrown).isInstanceOf(ArithmeticException.class)
|
|
.hasMessageContaining("/ by zero");
|
|
|
|
}
|
|
}
|