private void testGetFromDiffCacheReturnsChangedFilesSortedByPathForMerge()

in javatests/com/google/gerrit/plugins/codeowners/backend/ChangedFilesTest.java [429:533]
90 lines of code
3 McCabe index (conditional complexity)

  private void testGetFromDiffCacheReturnsChangedFilesSortedByPathForMerge(
      MergeCommitStrategy mergeCommitStrategy) throws Exception {
    setAsRootCodeOwners(admin);

    String file1 = "foo/bar.baz";
    String file2 = "foo/baz.bar";
    String file3 = "bar/foo.baz";
    String file4 = "bar/baz.foo";
    String file5 = "baz/foo.bar";

    // Create a base change.
    Change.Id baseChange =
        changeOperations
            .newChange()
            .branch("master")
            .file(file1)
            .content("base content")
            .file(file3)
            .content("base content")
            .file(file5)
            .content("base content")
            .create();
    approveAndSubmit(baseChange);

    // Create another branch
    String branchName = "foo";
    BranchInput branchInput = new BranchInput();
    branchInput.ref = branchName;
    branchInput.revision = projectOperations.project(project).getHead("master").name();
    gApi.projects().name(project.get()).branch(branchInput.ref).create(branchInput);

    // Create a change in master that touches file1, file3 and file5
    Change.Id changeInMaster =
        changeOperations
            .newChange()
            .branch("master")
            .file(file1)
            .content("master content")
            .file(file3)
            .content("master content")
            .file(file5)
            .content("master content")
            .create();
    approveAndSubmit(changeInMaster);

    // Create a change in the other branch and that touches file1, file3, file5 and creates file2,
    // file4.
    Change.Id changeInOtherBranch =
        changeOperations
            .newChange()
            .branch(branchName)
            .file(file1)
            .content("other content")
            .file(file2)
            .content("content")
            .file(file3)
            .content("other content")
            .file(file4)
            .content("content")
            .file(file5)
            .content("other content")
            .create();
    approveAndSubmit(changeInOtherBranch);

    // Create a merge change with a conflict resolution for file1 and file2 with the same content as
    // in the other branch (no conflict on file2).
    Change.Id mergeChange =
        changeOperations
            .newChange()
            .branch("master")
            .mergeOfButBaseOnFirst()
            .tipOfBranch("master")
            .and()
            .tipOfBranch(branchName)
            .file(file1)
            .content("merged content")
            .file(file2)
            .content("content")
            .file(file3)
            .content("merged content")
            .file(file4)
            .content("content")
            .file(file5)
            .content("merged content")
            .create();

    ImmutableList<ChangedFile> changedFilesSet =
        changedFiles.getFromDiffCache(
            project,
            getRevisionResource(Integer.toString(mergeChange.get())).getPatchSet().commitId(),
            mergeCommitStrategy);

    if (MergeCommitStrategy.ALL_CHANGED_FILES.equals(mergeCommitStrategy)) {
      assertThat(changedFilesSet)
          .comparingElementsUsing(hasPath())
          .containsExactly(file4, file3, file5, file1, file2)
          .inOrder();
    } else if (MergeCommitStrategy.FILES_WITH_CONFLICT_RESOLUTION.equals(mergeCommitStrategy)) {
      assertThat(changedFilesSet)
          .comparingElementsUsing(hasPath())
          .containsExactly(file3, file5, file1);
    } else {
      fail("expected merge commit strategy: " + mergeCommitStrategy);
    }
  }