src/test/java/com/google/devtools/build/lib/packages/AttributeContainerTest.java

// Copyright 2015 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.packages;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.events.Location.LineAndColumn;
import com.google.devtools.build.lib.testutil.TestRuleClassProvider;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Unit tests for {@link AttributeContainer}.
 */
@RunWith(JUnit4.class)
public class AttributeContainerTest {

  private RuleClass ruleClass;
  private AttributeContainer container;
  private Attribute attribute1;
  private Attribute attribute2;

  @Before
  public final void createAttributeContainer() throws Exception  {
    ruleClass =
        TestRuleClassProvider.getRuleClassProvider().getRuleClassMap().get("testing_dummy_rule");
    attribute1 = ruleClass.getAttributeByName("srcs");
    attribute2 = ruleClass.getAttributeByName("dummyinteger");
    container = new AttributeContainer(ruleClass);
  }

  @Test
  public void testAttributeSettingAndRetrievalByName() throws Exception {
    Object someValue1 = new Object();
    Object someValue2 = new Object();
    container.setAttributeValueByName(attribute1.getName(), someValue1);
    container.setAttributeValueByName(attribute2.getName(), someValue2);
    assertEquals(someValue1, container.getAttr(attribute1.getName()));
    assertEquals(someValue2, container.getAttr(attribute2.getName()));
    assertNull(container.getAttr("nomatch"));
  }

  @Test
  public void testAttributeSettingAndRetrievalByInstance() throws Exception {
    Object someValue1 = new Object();
    Object someValue2 = new Object();
    container.setAttributeValue(attribute1, someValue1, true);
    container.setAttributeValue(attribute2, someValue2, true);
    assertEquals(someValue1, container.getAttr(attribute1));
    assertEquals(someValue2, container.getAttr(attribute2));
  }

  @Test
  public void testExplicitSpecificationsByName() throws Exception {
    // Name-based setters are automatically considered explicit.
    container.setAttributeValueByName(attribute1.getName(), new Object());
    assertTrue(container.isAttributeValueExplicitlySpecified(attribute1));
    assertFalse(container.isAttributeValueExplicitlySpecified("nomatch"));
  }

  @Test
  public void testExplicitSpecificationsByInstance() throws Exception {
    Object someValue = new Object();
    container.setAttributeValue(attribute1, someValue, true);
    container.setAttributeValue(attribute2, someValue, false);
    assertTrue(container.isAttributeValueExplicitlySpecified(attribute1));
    assertFalse(container.isAttributeValueExplicitlySpecified(attribute2));
  }

  private static Location newLocation() {
    return Location.fromPathAndStartColumn(null, 0, 0, new LineAndColumn(0, 0));
  }

  @Test
  public void testAttributeLocation() throws Exception {
    Location location1 = newLocation();
    Location location2 = newLocation();
    container.setAttributeLocation(attribute1, location1);
    container.setAttributeLocation(attribute2, location2);
    assertEquals(location1, container.getAttributeLocation(attribute1.getName()));
    assertEquals(location2, container.getAttributeLocation(attribute2.getName()));
    assertNull(container.getAttributeLocation("nomatch"));
  }
}