// Copyright 2016 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.analysis;

import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertThrows;

import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.analysis.configuredtargets.RuleConfiguredTarget;
import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.packages.Attribute;
import com.google.devtools.build.lib.packages.BuildType;
import com.google.devtools.build.lib.packages.ConfiguredAttributeMapper;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.skyframe.ConfiguredTargetAndData;
import com.google.devtools.build.lib.util.FileTypeSet;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Unit tests for {@link AspectAwareAttributeMapper}.
 */
@RunWith(JUnit4.class)
public class AspectAwareAttributeMapperTest extends BuildViewTestCase {
  private Rule rule;
  private ImmutableMap<String, Attribute> aspectAttributes;
  private AspectAwareAttributeMapper mapper;

  @Before
  public final void createMapper() throws Exception {
    ConfiguredTargetAndData ctad =
        scratchConfiguredTargetAndData(
            "foo",
            "myrule",
            "cc_binary(",
            "    name = 'myrule',",
            "    srcs = [':a.cc'],",
            "    linkstatic = select({'//conditions:default': 1}))");

    RuleConfiguredTarget ct = (RuleConfiguredTarget) ctad.getConfiguredTarget();
    rule = (Rule) ctad.getTargetForTesting();
    Attribute aspectAttr = new Attribute.Builder<Label>("fromaspect", BuildType.LABEL)
        .allowedFileTypes(FileTypeSet.ANY_FILE)
        .build();
    aspectAttributes = ImmutableMap.<String, Attribute>of(aspectAttr.getName(), aspectAttr);
    mapper =
        new AspectAwareAttributeMapper(
            ConfiguredAttributeMapper.of(
                rule,
                ct.getConfigConditions(),
                ct.getConfigurationChecksum(),
                /*alwaysSucceed=*/ false),
            aspectAttributes);
  }

  @Test
  public void getName() throws Exception {
    assertThat(mapper.getName()).isEqualTo(rule.getName());
  }

  @Test
  public void getLabel() throws Exception {
    assertThat(mapper.getLabel()).isEqualTo(rule.getLabel());
  }

  @Test
  public void getRuleAttributeValue() throws Exception {
    assertThat(mapper.get("srcs", BuildType.LABEL_LIST))
        .containsExactly(Label.parseCanonical("//foo:a.cc"));
  }

  @Test
  public void getAspectAttributeValue() throws Exception {
    assertThrows(
        UnsupportedOperationException.class, () -> mapper.get("fromaspect", BuildType.LABEL));
  }

  @Test
  public void getAspectValueWrongType() throws Exception {
    IllegalArgumentException e =
        assertThrows(
            IllegalArgumentException.class, () -> mapper.get("fromaspect", BuildType.LABEL_LIST));
    assertThat(e)
        .hasMessageThat()
        .isEqualTo("attribute fromaspect has type label, not expected type list(label)");
  }

  @Test
  public void getMissingAttributeValue() throws Exception {
    IllegalArgumentException e =
        assertThrows(IllegalArgumentException.class, () -> mapper.get("noexist", BuildType.LABEL));
    assertThat(e)
        .hasMessageThat()
        .isEqualTo("no attribute 'noexist' in either //foo:myrule or its aspects");
  }

  @Test
  public void isConfigurable() throws Exception {
    assertThat(mapper.isConfigurable("linkstatic")).isTrue();
    assertThat(mapper.isConfigurable("fromaspect")).isFalse();
  }

  @Test
  public void getAttributeNames() throws Exception {
    assertThat(mapper.getAttributeNames()).containsAtLeast("srcs", "linkstatic", "fromaspect");
  }

  @Test
  public void getAttributeType() throws Exception {
    assertThat(mapper.getAttributeType("srcs")).isEqualTo(BuildType.LABEL_LIST);
    assertThat(mapper.getAttributeType("fromaspect")).isEqualTo(BuildType.LABEL);
  }

  @Test
  public void getAttributeDefinition() throws Exception {
    assertThat(mapper.getAttributeDefinition("srcs").getName()).isEqualTo("srcs");
    assertThat(mapper.getAttributeDefinition("fromaspect").getName()).isEqualTo("fromaspect");

  }

  @Test
  public void has() throws Exception {
    assertThat(mapper.has("srcs")).isTrue();
    assertThat(mapper.has("fromaspect")).isTrue();
  }
}