// Copyright 2017 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.skyframe;

import static com.google.devtools.build.skyframe.EvaluationResultSubjectFactory.assertThatEvaluationResult;

import com.google.common.testing.EqualsTester;
import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
import com.google.devtools.build.lib.packages.NoSuchPackageException;
import com.google.devtools.build.lib.skyframe.util.SkyframeExecutorTestUtils;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.ModifiedFileSet;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.skyframe.EvaluationResult;
import com.google.devtools.build.skyframe.SkyKey;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Tests for {@link WorkspaceNameValue} and {@link WorkspaceNameFunction}. */
@RunWith(JUnit4.class)
public class WorkspaceNameFunctionTest extends BuildViewTestCase {
  private final SkyKey key = WorkspaceNameValue.key();

  private EvaluationResult<WorkspaceNameValue> eval() throws InterruptedException {
    getSkyframeExecutor().invalidateFilesUnderPathForTesting(
        reporter,
        ModifiedFileSet.builder().modify(PathFragment.create("WORKSPACE")).build(),
        rootDirectory);
    return SkyframeExecutorTestUtils.evaluate(
        getSkyframeExecutor(), key, /*keepGoing=*/ false, reporter);
  }

  @Test
  public void testNormal() throws Exception {
    scratch.overwriteFile("WORKSPACE", "workspace(name = 'good')");
    assertThatEvaluationResult(eval())
        .hasEntryThat(key)
        .isEqualTo(WorkspaceNameValue.withName("good"));
  }

  @Test
  public void testErrorInExternalPkg() throws Exception {
    reporter.removeHandler(failFastHandler);
    scratch.overwriteFile("WORKSPACE", "workspace(bad)");
    assertThatEvaluationResult(eval())
        .hasEntryThat(key)
        .isEqualTo(WorkspaceNameValue.withError());
    assertContainsEvent("name 'bad' is not defined");
  }

  @Test
  public void testTransitiveSkyframeError() throws Exception {
    reporter.removeHandler(failFastHandler);
    scratch.deleteFile("WORKSPACE");
    FileSystemUtils.ensureSymbolicLink(scratch.resolve("WORKSPACE"), "WORKSPACE");
    // Transitive errors from WorkspaceNameValue should manifest themselves as
    // NoSuchPackageExceptions.
    assertThatEvaluationResult(eval())
        .hasErrorEntryForKeyThat(key)
        .hasExceptionThat()
        .isInstanceOf(NoSuchPackageException.class);
  }

  @Test
  public void testEqualsAndHashCode(){
    new EqualsTester()
        .addEqualityGroup(
            WorkspaceNameValue.withError(),
            WorkspaceNameValue.withError())
        .addEqualityGroup(
            WorkspaceNameValue.withName("foo"),
            WorkspaceNameValue.withName("foo"))
        .addEqualityGroup(
            WorkspaceNameValue.withName("bar"),
            WorkspaceNameValue.withName("bar"));
  }
}