/*
 * Copyright 2014-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.apple.project_generator;

import static org.junit.Assert.assertEquals;

import com.facebook.buck.model.BuildTargetFactory;
import com.facebook.buck.rules.BuildRuleResolver;
import com.facebook.buck.rules.DefaultTargetNodeToBuildRuleTransformer;
import com.facebook.buck.rules.FakeSourcePath;
import com.facebook.buck.rules.SourcePathResolver;
import com.facebook.buck.rules.SourcePathRuleFinder;
import com.facebook.buck.rules.TargetGraph;
import java.nio.file.Paths;
import org.junit.Before;
import org.junit.Test;

public class PathRelativizerTest {
  private PathRelativizer pathRelativizer;

  @Before
  public void setUp() {
    pathRelativizer =
        new PathRelativizer(
            Paths.get("output0/output1"),
            new SourcePathResolver(
                    new SourcePathRuleFinder(
                        new BuildRuleResolver(
                            TargetGraph.EMPTY, new DefaultTargetNodeToBuildRuleTransformer())))
                ::getRelativePath);
  }

  @Test
  public void testOutputPathToBuildTargetPath() {
    assertEquals(
        Paths.get("../../foo/bar"), pathRelativizer.outputDirToRootRelative(Paths.get("foo/bar")));
  }

  @Test
  public void testOutputPathToSourcePath() {
    assertEquals(
        Paths.get("../../source/path/foo.h"),
        pathRelativizer.outputPathToSourcePath(new FakeSourcePath("source/path/foo.h")));
  }

  @Test
  public void testOutputDirToRootRelative() {
    assertEquals(
        Paths.get("../../foo/bar"),
        pathRelativizer.outputPathToBuildTargetPath(
            BuildTargetFactory.newInstance("//foo/bar:baz")));
  }

  @Test
  public void testOutputDirToRootRelativeDoesNotAddExtraDotDots() {
    assertEquals(
        Paths.get("something"),
        pathRelativizer.outputDirToRootRelative(Paths.get("output0/output1/something")));
  }

  @Test
  public void testOutputDirToRootRelativeWorksForCurrentDir() {
    assertEquals(
        Paths.get("."), pathRelativizer.outputDirToRootRelative(Paths.get("output0/output1")));
  }

  @Test
  public void testOutputDirToRootRelativeWorksForParentDir() {
    assertEquals(Paths.get(".."), pathRelativizer.outputDirToRootRelative(Paths.get("output0")));
  }
}