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// Copyright 2018 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.rules;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.analysis.ConfiguredRuleClassProvider;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration.Fragment;
import com.google.devtools.build.lib.analysis.config.BuildOptions;
import com.google.devtools.build.lib.analysis.config.ConfigurationFragmentFactory;
import com.google.devtools.build.lib.analysis.config.FragmentOptions;
import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.cmdline.LabelSyntaxException;
import com.google.devtools.build.lib.packages.Attribute.LateBoundDefault;
import com.google.devtools.build.lib.packages.AttributeMap;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.rules.LateBoundAlias.CommonAliasRule;
import com.google.devtools.build.lib.testutil.TestRuleClassProvider;
import java.io.IOException;
import javax.annotation.Nullable;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests that LateBoundAlias can resolve null actual reference.
*/
@RunWith(JUnit4.class)
public class LateBoundAliasTest extends BuildViewTestCase {
private static final class TestFragment extends Fragment {}
private static final class TestFragmentOptionFactory implements ConfigurationFragmentFactory {
@Override
public Class<? extends Fragment> creates() {
return TestFragment.class;
}
@Override
public ImmutableSet<Class<? extends FragmentOptions>> requiredOptions() {
return ImmutableSet.of();
}
@Nullable
@Override
public Fragment create(BuildOptions buildOptions) {
return new TestFragment();
}
}
private static final class TestLateBoundDefault extends LateBoundDefault<TestFragment, Label> {
private TestLateBoundDefault() {
super(false, TestFragment.class, null);
}
@Override
public Label resolve(Rule rule, AttributeMap attributes, TestFragment input) {
return null;
}
}
private static final class MyTestRule extends CommonAliasRule {
public MyTestRule() {
super("test_rule_name", env -> new TestLateBoundDefault(), TestFragment.class);
}
}
@Override
protected ConfiguredRuleClassProvider getRuleClassProvider() {
ConfiguredRuleClassProvider.Builder builder = new ConfiguredRuleClassProvider.Builder();
TestRuleClassProvider.addStandardRules(builder);
builder.addConfigurationFragment(new TestFragmentOptionFactory());
builder.addRuleDefinition(new MyTestRule());
return builder.build();
}
@Test
public void testResolveNullTarget() throws IOException, LabelSyntaxException {
scratch.file("a/BUILD", "test_rule_name(name='alias')");
ConfiguredTarget alias = getConfiguredTarget("//a:alias");
assertThat(alias).isNotNull();
}
@Test
public void testNullTargetCanBeDependant() throws IOException, LabelSyntaxException {
scratch.file(
"a/BUILD",
"test_rule_name(name='alias')",
"filegroup(",
" name = 'my_filegroup',",
" srcs = [':alias']",
")");
ConfiguredTarget myFilegroup = getConfiguredTarget("//a:my_filegroup");
assertThat(myFilegroup).isNotNull();
}
}
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