gitlab-org--gitlab-foss/spec/models/diff_note_spec.rb

require 'spec_helper'

describe DiffNote, models: true do
  include RepoHelpers

  let(:project) { create(:project) }
  let(:merge_request) { create(:merge_request, source_project: project) }
  let(:commit) { project.commit(sample_commit.id) }

  let(:path) { "files/ruby/popen.rb" }

  let(:position) do
    Gitlab::Diff::Position.new(
      old_path: path,
      new_path: path,
      old_line: nil,
      new_line: 14,
      diff_refs: merge_request.diff_refs
    )
  end

  let(:new_position) do
    Gitlab::Diff::Position.new(
      old_path: path,
      new_path: path,
      old_line: 16,
      new_line: 22,
      diff_refs: merge_request.diff_refs
    )
  end

  subject { create(:diff_note_on_merge_request, project: project, position: position, noteable: merge_request) }

  describe "#position=" do
    context "when provided a string" do
      it "sets the position" do
        subject.position = new_position.to_json

        expect(subject.position).to eq(new_position)
      end
    end

    context "when provided a hash" do
      it "sets the position" do
        subject.position = new_position.to_h

        expect(subject.position).to eq(new_position)
      end
    end

    context "when provided a position object" do
      it "sets the position" do
        subject.position = new_position

        expect(subject.position).to eq(new_position)
      end
    end
  end

  describe "#diff_file" do
    it "returns the correct diff file" do
      diff_file = subject.diff_file

      expect(diff_file.old_path).to eq(position.old_path)
      expect(diff_file.new_path).to eq(position.new_path)
      expect(diff_file.diff_refs).to eq(position.diff_refs)
    end
  end

  describe "#diff_line" do
    it "returns the correct diff line" do
      diff_line = subject.diff_line

      expect(diff_line.added?).to be true
      expect(diff_line.new_line).to eq(position.new_line)
      expect(diff_line.text).to eq("+    vars = {")
    end
  end

  describe "#line_code" do
    it "returns the correct line code" do
      line_code = Gitlab::Diff::LineCode.generate(position.file_path, position.new_line, 15)

      expect(subject.line_code).to eq(line_code)
    end
  end

  describe "#for_line?" do
    context "when provided the correct diff line" do
      it "returns true" do
        expect(subject.for_line?(subject.diff_line)).to be true
      end
    end

    context "when provided a different diff line" do
      it "returns false" do
        some_line = subject.diff_file.diff_lines.first

        expect(subject.for_line?(some_line)).to be false
      end
    end
  end

  describe "#active?" do
    context "when noteable is a commit" do
      subject { create(:diff_note_on_commit, project: project, position: position) }

      it "returns true" do
        expect(subject.active?).to be true
      end
    end

    context "when noteable is a merge request" do
      context "when the merge request's diff refs match that of the diff note" do
        it "returns true" do
          expect(subject.active?).to be true
        end
      end

      context "when the merge request's diff refs don't match that of the diff note" do
        before do
          allow(subject.noteable).to receive(:diff_refs).and_return(commit.diff_refs)
        end

        it "returns false" do
          expect(subject.active?).to be false
        end
      end
    end
  end

  describe "#update_position" do
    context "when noteable is a commit" do
      subject { create(:diff_note_on_commit, project: project, position: position) }

      it "doesn't use the DiffPositionUpdateService" do
        expect(Notes::DiffPositionUpdateService).not_to receive(:new)

        subject.update_position
      end

      it "doesn't update the position" do
        subject.update_position

        expect(subject.original_position).to eq(position)
        expect(subject.position).to eq(position)
      end
    end

    context "when noteable is a merge request" do
      context "when the note is active" do
        it "doesn't use the DiffPositionUpdateService" do
          expect(Notes::DiffPositionUpdateService).not_to receive(:new)

          subject.update_position
        end

        it "doesn't update the position" do
          subject.update_position

          expect(subject.original_position).to eq(position)
          expect(subject.position).to eq(position)
        end
      end

      context "when the note is outdated" do
        before do
          allow(subject.noteable).to receive(:diff_refs).and_return(commit.diff_refs)
        end

        it "uses the DiffPositionUpdateService" do
          expect(Notes::DiffPositionUpdateService).to receive(:new).with(
            project,
            nil,
            old_diff_refs: position.diff_refs,
            new_diff_refs: commit.diff_refs,
            paths: [path]
          ).and_call_original
          expect_any_instance_of(Notes::DiffPositionUpdateService).to receive(:execute).with(subject)

          subject.update_position
        end
      end
    end
  end
end