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JUnitAssertThrowsToAssertExceptionTypeTest.java
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JUnitAssertThrowsToAssertExceptionTypeTest.java
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/*
* Copyright 2021 the original author or authors.
* <p>
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* <p>
* https://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openrewrite.java.testing.assertj;
import org.junit.jupiter.api.Test;
import org.openrewrite.DocumentExample;
import org.openrewrite.InMemoryExecutionContext;
import org.openrewrite.Issue;
import org.openrewrite.java.JavaParser;
import org.openrewrite.test.RecipeSpec;
import org.openrewrite.test.RewriteTest;
import static org.openrewrite.java.Assertions.java;
class JUnitAssertThrowsToAssertExceptionTypeTest implements RewriteTest {
@Override
public void defaults(RecipeSpec spec) {
spec
.parser(JavaParser.fromJavaVersion()
.classpathFromResources(new InMemoryExecutionContext(), "junit-jupiter-api-5.9", "hamcrest-2.2"))
.recipe(new JUnitAssertThrowsToAssertExceptionType());
}
@DocumentExample
@Test
void toAssertExceptionOfType() {
//language=java
rewriteRun(
java(
"""
import static org.junit.jupiter.api.Assertions.assertThrows;
public class SimpleExpectedExceptionTest {
public void throwsExceptionWithSpecificType() {
assertThrows(NullPointerException.class, () -> {
throw new NullPointerException();
});
}
}
""",
"""
import static org.assertj.core.api.AssertionsForClassTypes.assertThatExceptionOfType;
public class SimpleExpectedExceptionTest {
public void throwsExceptionWithSpecificType() {
assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {
throw new NullPointerException();
});
}
}
"""
)
);
}
@Test
void memberReference() {
//language=java
rewriteRun(
java(
"""
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
public class MemberReferenceTest {
public void throwsWithMemberReference() {
CompletableFuture<Boolean> future = new CompletableFuture<>();
assertThrows(ExecutionException.class, future::get);
}
}
""",
"""
import static org.assertj.core.api.AssertionsForClassTypes.assertThatExceptionOfType;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
public class MemberReferenceTest {
public void throwsWithMemberReference() {
CompletableFuture<Boolean> future = new CompletableFuture<>();
assertThatExceptionOfType(ExecutionException.class).isThrownBy(future::get);
}
}
"""
)
);
}
@Test
@Issue("https://github.com/openrewrite/rewrite-testing-frameworks/pull/331")
void assertThrowsAssignment() {
//language=java
rewriteRun(
java(
"""
import static org.junit.jupiter.api.Assertions.assertThrows;
public class SimpleExpectedExceptionTest {
public void throwsExceptionWithSpecificType() {
NullPointerException npe = assertThrows(NullPointerException.class, () -> {
throw new NullPointerException();
});
}
}
"""
)
);
}
/**
* A degenerate case showing we need to make sure the <code>assertThrows</code> appears
* immediately inside a J.Block.
*/
@Test
@Issue("https://github.com/openrewrite/rewrite-testing-frameworks/pull/331")
void assertThrowsTernaryAssignment() {
//language=java
rewriteRun(
java(
"""
import static org.junit.jupiter.api.Assertions.assertThrows;
public class SimpleExpectedExceptionTest {
public void throwsExceptionWithSpecificType() {
NullPointerException npe = hashCode() == 42
? new NullPointerException()
: assertThrows(NullPointerException.class, () -> {
throw new NullPointerException();
});
}
}
"""
)
);
}
}