/*
* Copyright 2015-present Facebook, 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.facebook.buck.cxx;
import static org.junit.Assert.assertThat;
import com.facebook.buck.model.BuildTarget;
import com.facebook.buck.model.BuildTargetFactory;
import com.facebook.buck.rules.BuildRuleSuccessType;
import com.facebook.buck.testutil.integration.BuckBuildLog;
import com.facebook.buck.testutil.integration.ProjectWorkspace;
import com.facebook.buck.testutil.integration.TemporaryPaths;
import com.facebook.buck.testutil.integration.TestDataHelper;
import java.util.Optional;
import org.hamcrest.Matchers;
import org.junit.Rule;
import org.junit.Test;
public class CxxLinkIntegrationTest {
@Rule public TemporaryPaths tmp = new TemporaryPaths();
@Test
public void inputBasedRuleKeyAvoidsRelinkingAfterChangeToUnusedHeader() throws Exception {
ProjectWorkspace workspace =
TestDataHelper.createProjectWorkspaceForScenario(this, "step_test", tmp);
workspace.setUp();
BuildTarget target = BuildTargetFactory.newInstance("//:binary_with_unused_header");
String unusedHeaderName = "unused_header.h";
BuildTarget linkTarget =
CxxDescriptionEnhancer.createCxxLinkTarget(target, Optional.<LinkerMapMode>empty());
// Run the build and verify that the C++ source was compiled.
workspace.runBuckBuild(target.toString());
BuckBuildLog.BuildLogEntry firstRunEntry = workspace.getBuildLog().getLogEntry(linkTarget);
assertThat(
firstRunEntry.getSuccessType(),
Matchers.equalTo(Optional.of(BuildRuleSuccessType.BUILT_LOCALLY)));
// Now modify the unused header.
workspace.writeContentsToPath(
"static inline int newFunction() { return 20; }", unusedHeaderName);
// Run the build again and verify that got a matching input-based rule key, and therefore
// didn't recompile.
workspace.runBuckBuild(target.toString());
BuckBuildLog.BuildLogEntry secondRunEntry = workspace.getBuildLog().getLogEntry(linkTarget);
assertThat(
secondRunEntry.getSuccessType(),
Matchers.equalTo(Optional.of(BuildRuleSuccessType.MATCHING_INPUT_BASED_RULE_KEY)));
// Also, make sure the original rule keys are actually different.
assertThat(
secondRunEntry.getRuleKey(), Matchers.not(Matchers.equalTo(firstRunEntry.getRuleKey())));
}
}