// Copyright (C) 2016 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.googlesource.gerrit.plugins.uploadvalidator;

import static com.google.common.truth.Truth.assertThat;
import static com.googlesource.gerrit.plugins.uploadvalidator.TestUtils.EMPTY_PLUGIN_CONFIG;
import static com.googlesource.gerrit.plugins.uploadvalidator.TestUtils.PATTERN_CACHE;

import com.google.gerrit.server.git.validators.CommitValidationMessage;
import com.google.gerrit.server.mime.MimeUtilFileTypeRegistry;
import com.google.inject.Inject;

import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class InvalidLineEndingValidatorTest extends ValidatorTestCase {
  private RevCommit makeCommit(RevWalk rw) throws IOException, GitAPIException {
    Map<File, byte[]> files = new HashMap<>();
    // invalid line endings
    String content = "Testline1\r\n" + "Testline2\n" + "Testline3\r\n" + "Testline4";
    files.put(
        new File(repo.getDirectory().getParent(), "foo.txt"),
        content.getBytes(StandardCharsets.UTF_8));

    // valid line endings
    content = "Testline1\n" + "Testline2\n" + "Testline3\n" + "Testline4";
    files.put(
        new File(repo.getDirectory().getParent(), "bar.txt"),
        content.getBytes(StandardCharsets.UTF_8));
    return TestUtils.makeCommit(rw, repo, "Commit with test files.", files);
  }

  @Test
  public void testCarriageReturn() throws Exception {
    try (RevWalk rw = new RevWalk(repo)) {
      RevCommit c = makeCommit(rw);
      InvalidLineEndingValidator validator =
          new InvalidLineEndingValidator(
              null,
              new ContentTypeUtil(PATTERN_CACHE, new FakeMimeUtilFileTypeRegistry()),
              null,
              null,
              null);
      List<CommitValidationMessage> m =
          validator.performValidation(repo, c, rw, EMPTY_PLUGIN_CONFIG);
      assertThat(TestUtils.transformMessages(m))
          .containsExactly("ERROR: found carriage return (CR) character in file: foo.txt");
    }
  }

  @Test
  public void validatorInactiveWhenConfigEmpty() {
    assertThat(InvalidLineEndingValidator.isActive(EMPTY_PLUGIN_CONFIG)).isFalse();
  }
}