require 'spec_helper'

describe Gitlab::Diff::Position, lib: true do
  include RepoHelpers

  let(:project) { create(:project, :repository) }

  describe "position for an added file" do
    let(:commit) { project.commit("2ea1f3dec713d940208fb5ce4a38765ecb5d3f73") }

    subject do
      described_class.new(
        old_path: "files/images/wm.svg",
        new_path: "files/images/wm.svg",
        old_line: nil,
        new_line: 5,
        diff_refs: commit.diff_refs
      )
    end

    describe "#diff_file" do
      it "returns the correct diff file" do
        diff_file = subject.diff_file(project.repository)

        expect(diff_file.new_file?).to be true
        expect(diff_file.new_path).to eq(subject.new_path)
        expect(diff_file.diff_refs).to eq(subject.diff_refs)
      end
    end

    describe "#diff_line" do
      it "returns the correct diff line" do
        diff_line = subject.diff_line(project.repository)

        expect(diff_line.added?).to be true
        expect(diff_line.new_line).to eq(subject.new_line)
        expect(diff_line.text).to eq("+    <desc>Created with Sketch.</desc>")
      end
    end

    describe "#line_code" do
      it "returns the correct line code" do
        line_code = Gitlab::Diff::LineCode.generate(subject.file_path, subject.new_line, 0)

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

  describe "position for a changed file" do
    let(:commit) { project.commit("570e7b2abdd848b95f2f578043fc23bd6f6fd24d") }

    describe "position for an added line" do
      subject do
        described_class.new(
          old_path: "files/ruby/popen.rb",
          new_path: "files/ruby/popen.rb",
          old_line: nil,
          new_line: 14,
          diff_refs: commit.diff_refs
        )
      end

      describe "#diff_file" do
        it "returns the correct diff file" do
          diff_file = subject.diff_file(project.repository)

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

      describe "#diff_line" do
        it "returns the correct diff line" do
          diff_line = subject.diff_line(project.repository)

          expect(diff_line.added?).to be true
          expect(diff_line.new_line).to eq(subject.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(subject.file_path, subject.new_line, 15)

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

    describe "position for an unchanged line" do
      subject do
        described_class.new(
          old_path: "files/ruby/popen.rb",
          new_path: "files/ruby/popen.rb",
          old_line: 16,
          new_line: 22,
          diff_refs: commit.diff_refs
        )
      end

      describe "#diff_file" do
        it "returns the correct diff file" do
          diff_file = subject.diff_file(project.repository)

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

      describe "#diff_line" do
        it "returns the correct diff line" do
          diff_line = subject.diff_line(project.repository)

          expect(diff_line.unchanged?).to be true
          expect(diff_line.old_line).to eq(subject.old_line)
          expect(diff_line.new_line).to eq(subject.new_line)
          expect(diff_line.text).to eq("     unless File.directory?(path)")
        end
      end

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

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

    describe "position for a removed line" do
      subject do
        described_class.new(
          old_path: "files/ruby/popen.rb",
          new_path: "files/ruby/popen.rb",
          old_line: 14,
          new_line: nil,
          diff_refs: commit.diff_refs
        )
      end

      describe "#diff_file" do
        it "returns the correct diff file" do
          diff_file = subject.diff_file(project.repository)

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

      describe "#diff_line" do
        it "returns the correct diff line" do
          diff_line = subject.diff_line(project.repository)

          expect(diff_line.removed?).to be true
          expect(diff_line.old_line).to eq(subject.old_line)
          expect(diff_line.text).to eq("-    options = { chdir: path }")
        end
      end

      describe "#line_code" do
        it "returns the correct line code" do
          line_code = Gitlab::Diff::LineCode.generate(subject.file_path, 13, subject.old_line)

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

  describe "position for a renamed file" do
    let(:commit) { project.commit("6907208d755b60ebeacb2e9dfea74c92c3449a1f") }

    describe "position for an added line" do
      subject do
        described_class.new(
          old_path: "files/js/commit.js.coffee",
          new_path: "files/js/commit.coffee",
          old_line: nil,
          new_line: 4,
          diff_refs: commit.diff_refs
        )
      end

      describe "#diff_file" do
        it "returns the correct diff file" do
          diff_file = subject.diff_file(project.repository)

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

      describe "#diff_line" do
        it "returns the correct diff line" do
          diff_line = subject.diff_line(project.repository)

          expect(diff_line.added?).to be true
          expect(diff_line.new_line).to eq(subject.new_line)
          expect(diff_line.text).to eq("+      new CommitFile(@)")
        end
      end

      describe "#line_code" do
        it "returns the correct line code" do
          line_code = Gitlab::Diff::LineCode.generate(subject.file_path, subject.new_line, 5)

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

    describe "position for an unchanged line" do
      subject do
        described_class.new(
          old_path: "files/js/commit.js.coffee",
          new_path: "files/js/commit.coffee",
          old_line: 3,
          new_line: 3,
          diff_refs: commit.diff_refs
        )
      end

      describe "#diff_file" do
        it "returns the correct diff file" do
          diff_file = subject.diff_file(project.repository)

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

      describe "#diff_line" do
        it "returns the correct diff line" do
          diff_line = subject.diff_line(project.repository)

          expect(diff_line.unchanged?).to be true
          expect(diff_line.old_line).to eq(subject.old_line)
          expect(diff_line.new_line).to eq(subject.new_line)
          expect(diff_line.text).to eq("     $('.files .diff-file').each ->")
        end
      end

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

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

    describe "position for a removed line" do
      subject do
        described_class.new(
          old_path: "files/js/commit.js.coffee",
          new_path: "files/js/commit.coffee",
          old_line: 4,
          new_line: nil,
          diff_refs: commit.diff_refs
        )
      end

      describe "#diff_file" do
        it "returns the correct diff file" do
          diff_file = subject.diff_file(project.repository)

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

      describe "#diff_line" do
        it "returns the correct diff line" do
          diff_line = subject.diff_line(project.repository)

          expect(diff_line.removed?).to be true
          expect(diff_line.old_line).to eq(subject.old_line)
          expect(diff_line.text).to eq("-      new CommitFile(this)")
        end
      end

      describe "#line_code" do
        it "returns the correct line code" do
          line_code = Gitlab::Diff::LineCode.generate(subject.file_path, 4, subject.old_line)

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

  describe "position for a deleted file" do
    let(:commit) { project.commit("8634272bfad4cf321067c3e94d64d5a253f8321d") }

    subject do
      described_class.new(
        old_path: "LICENSE",
        new_path: "LICENSE",
        old_line: 3,
        new_line: nil,
        diff_refs: commit.diff_refs
      )
    end

    describe "#diff_file" do
      it "returns the correct diff file" do
        diff_file = subject.diff_file(project.repository)

        expect(diff_file.deleted_file?).to be true
        expect(diff_file.old_path).to eq(subject.old_path)
        expect(diff_file.diff_refs).to eq(subject.diff_refs)
      end
    end

    describe "#diff_line" do
      it "returns the correct diff line" do
        diff_line = subject.diff_line(project.repository)

        expect(diff_line.removed?).to be true
        expect(diff_line.old_line).to eq(subject.old_line)
        expect(diff_line.text).to eq("-Copyright (c) 2014 gitlabhq")
      end
    end

    describe "#line_code" do
      it "returns the correct line code" do
        line_code = Gitlab::Diff::LineCode.generate(subject.file_path, 0, subject.old_line)

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

  describe "position for a file in the initial commit" do
    let(:commit) { project.commit("1a0b36b3cdad1d2ee32457c102a8c0b7056fa863") }

    subject do
      described_class.new(
        old_path: "README.md",
        new_path: "README.md",
        old_line: nil,
        new_line: 1,
        diff_refs: commit.diff_refs
      )
    end

    describe "#diff_file" do
      it "returns the correct diff file" do
        diff_file = subject.diff_file(project.repository)

        expect(diff_file.new_file?).to be true
        expect(diff_file.new_path).to eq(subject.new_path)
        expect(diff_file.diff_refs).to eq(subject.diff_refs)
      end
    end

    describe "#diff_line" do
      it "returns the correct diff line" do
        diff_line = subject.diff_line(project.repository)

        expect(diff_line.added?).to be true
        expect(diff_line.new_line).to eq(subject.new_line)
        expect(diff_line.text).to eq("+testme")
      end
    end

    describe "#line_code" do
      it "returns the correct line code" do
        line_code = Gitlab::Diff::LineCode.generate(subject.file_path, subject.new_line, 0)

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

  describe "position for a file in a straight comparison" do
    let(:diff_refs) do
      Gitlab::Diff::DiffRefs.new(
        start_sha: '0b4bc9a49b562e85de7cc9e834518ea6828729b9', # feature
        base_sha: '0b4bc9a49b562e85de7cc9e834518ea6828729b9',
        head_sha: 'e63f41fe459e62e1228fcef60d7189127aeba95a' # master
      )
    end

    subject do
      described_class.new(
        old_path: "files/ruby/feature.rb",
        new_path: "files/ruby/feature.rb",
        old_line: 3,
        new_line: nil,
        diff_refs: diff_refs
      )
    end

    describe "#diff_file" do
      it "returns the correct diff file" do
        diff_file = subject.diff_file(project.repository)

        expect(diff_file.deleted_file?).to be true
        expect(diff_file.old_path).to eq(subject.old_path)
        expect(diff_file.diff_refs).to eq(subject.diff_refs)
      end
    end

    describe "#diff_line" do
      it "returns the correct diff line" do
        diff_line = subject.diff_line(project.repository)

        expect(diff_line.removed?).to be true
        expect(diff_line.old_line).to eq(subject.old_line)
        expect(diff_line.text).to eq("-    puts 'bar'")
      end
    end

    describe "#line_code" do
      it "returns the correct line code" do
        line_code = Gitlab::Diff::LineCode.generate(subject.file_path, 0, subject.old_line)

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

  describe "#to_json" do
    let(:hash) do
      {
        old_path: "files/ruby/popen.rb",
        new_path: "files/ruby/popen.rb",
        old_line: nil,
        new_line: 14,
        base_sha: nil,
        head_sha: nil,
        start_sha: nil
      }
    end

    let(:diff_position) { described_class.new(hash) }

    it "returns the position as JSON" do
      expect(JSON.parse(diff_position.to_json)).to eq(hash.stringify_keys)
    end

    it "works when nested under another hash" do
      expect(JSON.parse(JSON.generate(pos: diff_position))).to eq('pos' => hash.stringify_keys)
    end
  end
end
