post_generator_spec.rb

require 'spec_helper'

module Postmarkdown
  describe PostGenerator do
    include GeneratorSpec::TestCase
    destination File.expand_path('../../../../../tmp', __FILE__)

    before do
      prepare_destination

      Post.stub(:directory) { File.expand_path('tmp/app/posts') }
      Post.class_variable_set('@@posts', nil)
    end

    context 'with the slug parameter' do
      it 'creates a file for the slug and the current date' do
        Time.zone.stub(:now).and_return Time.utc(2012, 1, 1, 10, 20, 30)

        run_generator %w(test-post)

        Dir.glob('tmp/app/posts/*').should == ['tmp/app/posts/2012-01-01-102030-test-post.markdown']

        Post.all.count.should == 1

        post = Post.first
        post.slug.should == 'test-post'
        post.date.should == Date.parse('2012-01-01')
        post.title.should == 'Test post'
      end
    end

    context 'with the slug parameter including an underscore' do
      it 'creates the correct file and sets the right values' do
        Time.zone.stub(:now).and_return Time.utc(2012, 1, 1, 10, 20, 30)

        run_generator %w(test-post_with_underscores)

        Dir.glob('tmp/app/posts/*').should == ['tmp/app/posts/2012-01-01-102030-test-post_with_underscores.markdown']

        Post.all.count.should == 1

        post = Post.first
        post.slug.should == 'test-post_with_underscores'
        post.date.should == Date.parse('2012-01-01')
        post.title.should == 'Test post_with_underscores'
      end
    end

    context 'with the slug and date parameters' do
      it 'creates a file for the slug and the given date' do
        run_generator %w(other-post --date=2012-01-02)

        Dir.glob('tmp/app/posts/*').should == ['tmp/app/posts/2012-01-02-000000-other-post.markdown']

        Post.all.count.should == 1

        post = Post.first
        post.slug.should == 'other-post'
        post.date.should == Date.parse('2012-01-02')
        post.title.should == 'Other post'
      end
    end

    context 'with the slug, date and time parameters' do
      it 'creates a file for the slug and the given date' do
        run_generator %w(other-post --date=2012-01-02-102030)

        Dir.glob('tmp/app/posts/*').should == ['tmp/app/posts/2012-01-02-102030-other-post.markdown']

        Post.all.count.should == 1

        post = Post.first
        post.slug.should == 'other-post'
        post.date.should == Time.utc(2012, 01, 02, 10, 20, 30).to_date
        post.title.should == 'Other post'
      end
    end

    context 'with invalid slug' do
      it 'raises a system exit exception' do
        lambda { run_generator %w(!test-post) }.should raise_error(SystemExit)
      end

      it 'does not create the file' do
        Dir['app/posts/*'].should be_empty
      end
    end

    context 'with invalid date' do
      it 'raises a system exit exception' do
        lambda { run_generator %w(test-post --date=2012-02) }.should raise_error(SystemExit)
      end

      it 'does not create the file' do
        Dir['app/posts/*'].should be_empty
      end
    end

    it 'does not error if git is unavailable' do
      begin
        old_path = ENV['PATH']
        ENV['PATH'] = ''
        expect {
          run_generator %w(test)
        }.to_not raise_error
      ensure
        ENV['PATH'] = old_path
      end
    end
  end
end