require 'spec_helper'
require 'git_tracker/commit_message'
require 'active_support/core_ext/string/strip'

describe GitTracker::CommitMessage do
  include CommitMessageHelper

  subject { described_class.new(file) }
  let(:file) { 'COMMIT_EDITMSG' }

  it 'requires path to the temporary commit message file' do
    expect { GitTracker::CommitMessage.new }.to raise_error ArgumentError
  end

  def stub_commit_message(story_text)
    File.stub(:read).with(file) { example_commit_message(story_text) }
  end

  describe '#keyword' do
    %w[fix Fixed FIXES Complete completed completes FINISH finished Finishes Deliver delivered DELIVERS].each do |keyword|
      it "detects the #{keyword} keyword" do
        stub_commit_message("Did the darn thing. [#{keyword}]")
        expect(subject.keyword).to eq(keyword)
      end
    end

    it 'does not find the keyword when it does not exist' do
      stub_commit_message('Did the darn thing. [Something]')
      expect(subject.keyword).to_not be
    end
  end

  describe '#mentions_story?' do
    context 'commit message contains the special Pivotal Tracker story syntax' do
      it 'allows just the number' do
        stub_commit_message('[#8675309]')
        expect(subject).to be_mentions_story('8675309')
      end

      it 'allows multiple numbers' do
        stub_commit_message('[#99 #777 #8675309 #111222]')
        expect(subject).to be_mentions_story('99')
        expect(subject).to be_mentions_story('777')
        expect(subject).to be_mentions_story('8675309')
        expect(subject).to be_mentions_story('111222')
      end

      it 'allows state change before number' do
        stub_commit_message('[Fixes #8675309]')
        expect(subject).to be_mentions_story('8675309')
      end

      it 'allows state change after the number' do
        stub_commit_message('[#8675309 Delivered]')
        expect(subject).to be_mentions_story('8675309')
      end

      it 'allows surrounding text' do
        stub_commit_message('derp de #herp [Fixes #8675309] de herp-ity derp')
        expect(subject).to be_mentions_story('8675309')
      end
    end

    context 'commit message doesn not contain the special Pivotal Tracker story syntax' do
      it 'requires brackets' do
        stub_commit_message('#8675309')
        expect(subject).to_not be_mentions_story('8675309')
      end

      it 'requires a pound sign' do
        stub_commit_message('[8675309]')
        expect(subject).to_not be_mentions_story('8675309')
      end

      it 'does not allow the bare number' do
        stub_commit_message('8675309')
        expect(subject).to_not be_mentions_story('8675309')
      end

      it 'does not allow multiple state changes' do
        stub_commit_message('[Fixes Deploys #8675309]')
        expect(subject).to_not be_mentions_story('8675309')
      end

      it 'does not allow comments' do
        stub_commit_message('#[#8675309]')
        expect(subject).to_not be_mentions_story('8675309')
      end
    end
  end

  describe '#append' do
    let(:fake_file) { GitTracker::FakeFile.new }
    before do
      File.stub(:open).and_yield(fake_file)
    end
    def stub_original_commit_message(message)
      File.stub(:read) { message }
    end

    it 'handles no existing message' do
      commit_message = <<-COMMIT_MESSAGE.strip_heredoc


        [#8675309]
        # some other comments
      COMMIT_MESSAGE

      stub_original_commit_message("\n\n# some other comments\n")
      subject.append('[#8675309]')

      expect(fake_file.content).to eq(commit_message)
    end

    it 'preserves existing messages' do
      commit_message = <<-COMMIT_MESSAGE.strip_heredoc
        A first line

        With more here

        [#8675309]
        # other comments
      COMMIT_MESSAGE

      stub_original_commit_message("A first line\n\nWith more here\n# other comments\n")
      subject.append('[#8675309]')

      expect(fake_file.content).to eq(commit_message)
    end

    it 'preserves line breaks in comments' do
      commit_message = <<-COMMIT_MESSAGE.strip_heredoc


        [#8675309]
        # comment #1
        # comment B
        # comment III
      COMMIT_MESSAGE

      stub_original_commit_message("# comment #1\n# comment B\n# comment III")
      subject.append('[#8675309]')

      expect(fake_file.content).to eq(commit_message)
    end
  end
end