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/*
* Copyright (c) 2015 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 org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.junit.runners.model.Statement;
/** Test that stack traces are included in the error message created by Expect. */
@RunWith(JUnit4.class)
public class ExpectFailureWithStackTraceTest {
private static final String METHOD_NAME = "ExpectFailureWithStackTraceTest.expectTwoFailures";
@Rule public final FailingExpect failToExpect = new FailingExpect();
@Test
public void expectTwoFailures() {
failToExpect.delegate.that(4).isNotEqualTo(4);
failToExpect.delegate.that("abc").contains("x");
}
/** Expect class that can examine the error message */
public static class FailingExpect implements TestRule {
final Expect delegate = Expect.create();
@Override
public Statement apply(Statement base, Description description) {
final Statement s = delegate.apply(base, description);
return new Statement() {
@Override
public void evaluate() throws Throwable {
String failureMessage = "";
try {
s.evaluate();
} catch (AssertionError e) {
failureMessage = e.getMessage();
}
// Check that error message contains stack traces. Method name should appear twice,
// once for each expect error.
int firstIndex = failureMessage.indexOf(METHOD_NAME);
assertThat(firstIndex).isGreaterThan(0);
int secondIndex = failureMessage.indexOf(METHOD_NAME, firstIndex + 1);
assertThat(secondIndex).isGreaterThan(firstIndex);
}
};
}
}
}
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