require 'spec_helper'
require 'tasks/gem/bump_task'
require 'git'
require 'anvil'

describe Gem::BumpTask do
  subject { Gem::BumpTask.new 'major' }

  describe '#task' do
    before  { allow(subject).to receive(:read_version).and_return('2.0.0') }

    it 'bumps the version and writes it' do
      expect(subject).to receive(:prepare_repo).and_return(true)
      allow(subject).to receive(:write_version)
                          .with(instance_of(String))
                          .and_return(true)

      expect(subject.task).to eq('3.0.0')
    end
  end

  describe '#write_version' do
    context 'when persisting' do
      subject { Gem::BumpTask.new 'major', persist: true }
      it 'writes the file and push the changes' do
        expect(subject).to receive(:version_file).with('w+')
        expect(subject).to receive(:commit_and_tag)
      end
    end

    context 'when no persisting' do
      it 'writes the file but does not persist the change in git' do
        expect(subject).to receive(:version_file).with('w+')
        expect(subject).to_not receive(:commit_and_tag)
      end
    end

    after { subject.send :write_version, '2.0.0' }
  end

  describe '#prepare_repo' do
    context 'on a clean repo' do
      let(:git) { double(:git, current_branch: 'some-branch') }

      before do
        allow(subject).to receive(:clean?).and_return(true)
        allow(subject).to receive(:git).and_return(git)
      end

      it 'pulls from current branch' do
        expect(git).to receive(:pull).with('origin', git.current_branch)
      end

      after { subject.send :prepare_repo }
    end

    context 'on a dirty repo' do
      before { allow(subject).to receive(:clean?).and_return(false) }

      it 'raises RepoNotClean' do
        expect do
          subject.send :prepare_repo
        end.to raise_error(Anvil::RepoNotClean)
      end
    end
  end

  describe '#commit_and_tag' do
    let(:version) { '1.0.0' }
    let(:git) { double(:git, current_branch: 'some-branch') }

    before do
      allow(subject).to receive(:git).and_return(git)
    end

    it 'commits and tag the current branch' do
      expect(git).to receive(:add).with('VERSION')
      expect(git).to receive(:commit).with("Bump version v#{version}")
      expect(git).to receive(:add_tag).with("v#{version}")
      expect(git).to receive(:push).with('origin', git.current_branch)
    end

    after { subject.send :commit_and_tag, version }
  end
end