/*
 * Copyright 2012-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.rules;

import static org.junit.Assert.assertEquals;

import com.facebook.buck.shell.CommandRunner;
import com.facebook.buck.util.AndroidPlatformTarget;
import com.facebook.buck.util.HumanReadableException;
import com.facebook.buck.util.ProjectFilesystem;
import com.google.common.base.Optional;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableList;

import org.easymock.EasyMock;
import org.junit.Test;

import java.io.File;
import java.util.List;

public class BuildContextTest {

  @Test
  public void testGetAndroidBootclasspathSupplierWithAndroidPlatformTarget() {
    BuildContext.Builder builder = BuildContext.builder();

    // Set to non-null values.
    builder.setProjectRoot(EasyMock.createMock(File.class));
    builder.setDependencyGraph(EasyMock.createMock(DependencyGraph.class));
    builder.setCommandRunner(EasyMock.createMock(CommandRunner.class));
    builder.setProjectFilesystem(EasyMock.createMock(ProjectFilesystem.class));
    builder.setJavaPackageFinder(EasyMock.createMock(JavaPackageFinder.class));

    AndroidPlatformTarget androidPlatformTarget = EasyMock.createMock(AndroidPlatformTarget.class);
    List<File> entries = ImmutableList.of(
        new File("add-ons/addon-google_apis-google-15/libs/effects.jar"),
        new File("add-ons/addon-google_apis-google-15/libs/maps.jar"),
        new File("add-ons/addon-google_apis-google-15/libs/usb.jar"));
    EasyMock.expect(androidPlatformTarget.getBootclasspathEntries()).andReturn(entries);

    EasyMock.replay(androidPlatformTarget);

    builder.setAndroidBootclasspathForAndroidPlatformTarget(Optional.of(androidPlatformTarget));

    BuildContext context = builder.build();
    Supplier<String> androidBootclasspathSupplier = context.getAndroidBootclasspathSupplier();

    String androidBootclasspath = androidBootclasspathSupplier.get();
    assertEquals(
        "add-ons/addon-google_apis-google-15/libs/effects.jar:" +
        "add-ons/addon-google_apis-google-15/libs/maps.jar:" +
        "add-ons/addon-google_apis-google-15/libs/usb.jar",
        androidBootclasspath);

    // Call get() again to ensure that the underlying getBootclasspathEntries() is not called again
    // to verify that memoization is working as expected.
    androidBootclasspathSupplier.get();

    EasyMock.verify(androidPlatformTarget);
  }

  @Test(expected = HumanReadableException.class)
  public void testGetAndroidBootclasspathSupplierWithoutAndroidPlatformTarget() {
    BuildContext.Builder builder = BuildContext.builder();

    // Set to non-null values.
    builder.setProjectRoot(EasyMock.createMock(File.class));
    builder.setDependencyGraph(EasyMock.createMock(DependencyGraph.class));
    builder.setCommandRunner(EasyMock.createMock(CommandRunner.class));
    builder.setProjectFilesystem(EasyMock.createMock(ProjectFilesystem.class));
    builder.setJavaPackageFinder(EasyMock.createMock(JavaPackageFinder.class));

    BuildContext context = builder.build();
    Supplier<String> androidBootclasspathSupplier = context.getAndroidBootclasspathSupplier();

    // If no AndroidPlatformTarget is passed to the builder, it should return a Supplier whose get()
    // method throws an exception.
    androidBootclasspathSupplier.get();
  }

  @Test(expected = HumanReadableException.class)
  public void testGetAndroidBootclasspathSupplierWithAbsentAndroidPlatformTarget() {
    BuildContext.Builder builder = BuildContext.builder();

    // Set to non-null values.
    builder.setProjectRoot(EasyMock.createMock(File.class));
    builder.setDependencyGraph(EasyMock.createMock(DependencyGraph.class));
    builder.setCommandRunner(EasyMock.createMock(CommandRunner.class));
    builder.setProjectFilesystem(EasyMock.createMock(ProjectFilesystem.class));
    builder.setJavaPackageFinder(EasyMock.createMock(JavaPackageFinder.class));

    // Set to absent value.
    builder.setAndroidBootclasspathForAndroidPlatformTarget(
        Optional.<AndroidPlatformTarget>absent());

    BuildContext context = builder.build();
    Supplier<String> androidBootclasspathSupplier = context.getAndroidBootclasspathSupplier();

    // If no AndroidPlatformTarget is passed to the builder, it should return a Supplier whose get()
    // method throws an exception.
    androidBootclasspathSupplier.get();
  }
}