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// Copyright (C) 2017 The Android Open Source Project
//
// 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.gerrit.extensions.common;

import static com.google.common.truth.Truth.assertAbout;

import com.google.common.truth.FailureStrategy;
import com.google.common.truth.IterableSubject;
import com.google.common.truth.StringSubject;
import com.google.common.truth.Subject;
import com.google.common.truth.SubjectFactory;
import com.google.common.truth.Truth;
import com.google.gerrit.extensions.common.DiffInfo.ContentEntry;
import com.google.gerrit.truth.ListSubject;

public class ContentEntrySubject extends Subject<ContentEntrySubject, ContentEntry> {

  private static final SubjectFactory<ContentEntrySubject, ContentEntry> DIFF_INFO_SUBJECT_FACTORY =
      new SubjectFactory<ContentEntrySubject, ContentEntry>() {
        @Override
        public ContentEntrySubject getSubject(
            FailureStrategy failureStrategy, ContentEntry contentEntry) {
          return new ContentEntrySubject(failureStrategy, contentEntry);
        }
      };

  public static ContentEntrySubject assertThat(ContentEntry contentEntry) {
    return assertAbout(DIFF_INFO_SUBJECT_FACTORY).that(contentEntry);
  }

  private ContentEntrySubject(FailureStrategy failureStrategy, ContentEntry contentEntry) {
    super(failureStrategy, contentEntry);
  }

  public void isDueToRebase() {
    isNotNull();
    ContentEntry contentEntry = actual();
    Truth.assertWithMessage("Entry should be marked 'dueToRebase'")
        .that(contentEntry.dueToRebase)
        .named("dueToRebase")
        .isTrue();
  }

  public void isNotDueToRebase() {
    isNotNull();
    ContentEntry contentEntry = actual();
    Truth.assertWithMessage("Entry should not be marked 'dueToRebase'")
        .that(contentEntry.dueToRebase)
        .named("dueToRebase")
        .isNull();
  }

  public ListSubject<StringSubject, String> commonLines() {
    isNotNull();
    ContentEntry contentEntry = actual();
    return ListSubject.assertThat(contentEntry.ab, Truth::assertThat).named("common lines");
  }

  public ListSubject<StringSubject, String> linesOfA() {
    isNotNull();
    ContentEntry contentEntry = actual();
    return ListSubject.assertThat(contentEntry.a, Truth::assertThat).named("lines of 'a'");
  }

  public ListSubject<StringSubject, String> linesOfB() {
    isNotNull();
    ContentEntry contentEntry = actual();
    return ListSubject.assertThat(contentEntry.b, Truth::assertThat).named("lines of 'b'");
  }

  public IterableSubject intralineEditsOfA() {
    isNotNull();
    ContentEntry contentEntry = actual();
    return Truth.assertThat(contentEntry.editA).named("intraline edits of 'a'");
  }

  public IterableSubject intralineEditsOfB() {
    isNotNull();
    ContentEntry contentEntry = actual();
    return Truth.assertThat(contentEntry.editB).named("intraline edits of 'b'");
  }
}