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/*
* Copyright (c) 2019 Google, Inc.
*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 com.google.common.truth;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.fail;
import com.google.common.collect.Iterables;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link Correspondence.ExceptionStore}.
*
* <p>These should not be run under j2cl, because the descriptions don't include the expected stack
* traces there.
*
* @author Pete Gillin
*/
@RunWith(JUnit4.class)
public final class CorrespondenceExceptionStoreTest extends BaseSubjectTestCase {
@Test
public void hasCompareException_empty() {
Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
assertThat(exceptions.hasCompareException()).isFalse();
}
@Test
public void hasCompareException_hasCompareException() {
Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
addCompareException(exceptions);
assertThat(exceptions.hasCompareException()).isTrue();
}
@Test
public void describeAsMainCause_empty() {
Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
try {
exceptions.describeAsMainCause();
fail("Expected IllegalStateException");
} catch (IllegalStateException expected) {
}
}
@Test
public void describeAsMainCause_notEmpty() {
Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
addCompareException(exceptions);
assertExpectedFacts(
exceptions.describeAsMainCause(),
"one or more exceptions were thrown while comparing elements");
}
@Test
public void describeAsAdditionalInfo_empty() {
Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
assertThat(exceptions.describeAsAdditionalInfo()).isEmpty();
}
@Test
public void describeAsAdditionalInfo_notEmpty() {
Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
addCompareException(exceptions);
assertExpectedFacts(
exceptions.describeAsAdditionalInfo(),
"additionally, one or more exceptions were thrown while comparing elements");
}
/** Adds a somewhat realistic exception from {@link Correspondence#compare} to the given store. */
private static void addCompareException(Correspondence.ExceptionStore exceptions) {
try {
boolean unused = TestCorrespondences.WITHIN_10_OF.compare(null, 123);
} catch (RuntimeException e) {
exceptions.addCompareException(CorrespondenceExceptionStoreTest.class, e, null, 123);
}
}
/**
* Asserts that the given iterable has two facts, the first with the given key and no value, the
* second with a key of {@code "first exception"} and a value describing the exception added by
* {@link #addCompareException}.
*/
private static void assertExpectedFacts(Iterable<Fact> facts, String expectedFirstKey) {
assertThat(facts).hasSize(2);
Fact first = Iterables.get(facts, 0);
Fact second = Iterables.get(facts, 1);
assertThat(first.key).isEqualTo(expectedFirstKey);
assertThat(first.value).isNull();
assertThat(second.key).isEqualTo("first exception");
assertThat(second.value)
.matches( // an initial statement of the method that threw and the exception type:
"compare\\(null, 123\\) threw java.lang.NullPointerException"
// some whitespace:
+ "\\s+"
// the start of a stack trace, with the correct class:
+ "at com\\.google\\.common\\.truth\\.TestCorrespondences"
// the rest of the stack trace, which we don't validate (and may contain newlines):
+ "(.|\\n)*"
// the expected separator
+ "\\n---");
}
}
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