/*
 * Copyright 2017-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.BuildTargetFactory;
import com.facebook.buck.rules.BuildRuleResolver;
import com.facebook.buck.rules.DefaultTargetNodeToBuildRuleTransformer;
import com.facebook.buck.rules.SourcePathResolver;
import com.facebook.buck.rules.SourcePathRuleFinder;
import com.facebook.buck.rules.TargetGraph;
import com.facebook.buck.rules.TargetNode;
import com.facebook.buck.rules.macros.LocationMacro;
import com.facebook.buck.testutil.TargetGraphFactory;
import org.hamcrest.Matchers;
import org.junit.Test;

public class CxxLocationMacroExpanderTest {

  @Test
  public void expandCxxGenrule() throws Exception {
    CxxGenruleBuilder builder =
        new CxxGenruleBuilder(BuildTargetFactory.newInstance("//:rule")).setOut("out.txt");
    TargetNode<?, ?> node = builder.build();
    TargetGraph targetGraph = TargetGraphFactory.newInstance(node);
    BuildRuleResolver resolver =
        new BuildRuleResolver(targetGraph, new DefaultTargetNodeToBuildRuleTransformer());
    SourcePathResolver pathResolver = new SourcePathResolver(new SourcePathRuleFinder(resolver));
    CxxGenrule cxxGenrule = (CxxGenrule) resolver.requireRule(node.getBuildTarget());
    CxxLocationMacroExpander expander =
        new CxxLocationMacroExpander(CxxPlatformUtils.DEFAULT_PLATFORM);
    String expanded =
        expander.expandFrom(
            node.getBuildTarget(),
            node.getCellNames(),
            resolver,
            LocationMacro.of(node.getBuildTarget()));
    assertThat(
        expanded,
        Matchers.equalTo(
            pathResolver
                .getAbsolutePath(cxxGenrule.getGenrule(CxxPlatformUtils.DEFAULT_PLATFORM))
                .toString()));
  }
}