// Copyright 2013 Google Inc. 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.enterprise.adaptor.fs;

import static com.google.enterprise.adaptor.fs.AclView.user;
import static com.google.enterprise.adaptor.fs.AclView.group;

import static org.junit.Assert.*;

import static java.nio.file.attribute.AclEntryFlag.*;
import static java.nio.file.attribute.AclEntryPermission.*;
import static java.nio.file.attribute.AclEntryType.*;

import org.junit.*;
import org.junit.rules.ExpectedException;

import java.nio.file.attribute.AclEntry;
import java.nio.file.attribute.AclFileAttributeView;
import java.util.List;

/**
 * Test cases for {@link AclFileAttributeViews}.
 */
public class AclFileAttributeViewsTest {
  @Rule
  public ExpectedException thrown = ExpectedException.none();

  private final AclFileAttributeViews aclViews = 
      new AclFileAttributeViews(directAclView(), inheritedAclView());

  // Helper methods that create new AclView and List<AclEntry> instances, so
  // that tests for equality go all the way down to the individual AclEntries.

  private AclFileAttributeView directAclView() {
    return new AclView(user("joe").type(ALLOW).perms(READ_DATA));
  }

  private AclFileAttributeView inheritedAclView() { 
    return new AclView(group("EVERYONE").type(ALLOW).perms(READ_DATA)
                       .flags(FILE_INHERIT, DIRECTORY_INHERIT));
  }

  @Test
  public void testConstructorNullDirectAcl() throws Exception {
    thrown.expect(NullPointerException.class);
    new AclFileAttributeViews(null, inheritedAclView());
  }

  @Test
  public void testConstructorNullInheritedAcl() throws Exception {
    thrown.expect(NullPointerException.class);
    new AclFileAttributeViews(directAclView(), null);
  }

  @Test
  public void testGetDirectAclView() throws Exception {
    assertEquals(directAclView().getAcl(),
                 aclViews.getDirectAclView().getAcl());
  }

  @Test
  public void testInheritedAclView() throws Exception {
    assertEquals(inheritedAclView().getAcl(),
                 aclViews.getInheritedAclView().getAcl());
  }

  @Test
  public void testGetCombinedAclView() throws Exception {
    List<AclEntry> acl = aclViews.getCombinedAclView().getAcl();
    assertNotNull(acl);
    assertEquals(2, acl.size());
    assertTrue(acl.contains(directAclView().getAcl().get(0)));
    assertTrue(acl.contains(inheritedAclView().getAcl().get(0)));
  }

  @Test
  public void getCombinedAclViewNoInheritedAcl() throws Exception {
    AclFileAttributeViews aclViews =
        new AclFileAttributeViews(directAclView(), new AclView());
    assertEquals(directAclView().getAcl(),
                 aclViews.getCombinedAclView().getAcl());
  }

  @Test
  public void getCombinedAclViewNoDirectAcl() throws Exception {
    AclFileAttributeViews aclViews =
      new AclFileAttributeViews(new AclView(), inheritedAclView());
    assertEquals(inheritedAclView().getAcl(),
                 aclViews.getCombinedAclView().getAcl());
  }
}