master/spec/guard/dsl_spec.rb

require 'spec_helper'
require 'guard/dsl'

describe Guard::Dsl do
  subject { Guard::Dsl }
  
  before(:each) do
    ::Guard.stub!(:add_guard)
  end
  
  it "write an error message when no Guardfile is found" do
    Dir.stub!(:pwd).and_return("no_guardfile_here")
    
    Guard::UI.should_receive(:error).with("No Guardfile in current folder, please create one.")
    lambda { subject.evaluate_guardfile }.should raise_error
  end
  
  it "write an error message when Guardfile is not valid" do
    mock_guardfile_content("This Guardfile is invalid!")
    
    Guard::UI.should_receive(:error).with(/Invalid Guardfile, original error is:\n/)
    lambda { subject.evaluate_guardfile }.should raise_error
  end
  
  it "load a guard from the DSL" do
    mock_guardfile_content("guard 'test'")
    
    ::Guard.should_receive(:add_guard).with('test', [], {})
    subject.evaluate_guardfile
  end
  
  it "receive watchers when specified" do
    mock_guardfile_content("
      guard 'test' do
        watch('a') { 'b' }
        watch('c')
      end")
      
    ::Guard.should_receive(:add_guard).with('test', anything, {}) do |name, watchers, options|
      watchers.size.should == 2
      watchers[0].pattern.should     == 'a'
      watchers[0].action.call.should == proc { 'b' }.call
      watchers[1].pattern.should     == 'c'
      watchers[1].action.should      be_nil
    end
    subject.evaluate_guardfile
  end
  
  it "receive options when specified" do
    mock_guardfile_content("guard 'test', :opt_a => 1, :opt_b => 'fancy'")
    
    ::Guard.should_receive(:add_guard).with('test', anything, { :opt_a => 1, :opt_b => 'fancy' })
    subject.evaluate_guardfile
  end
  
private
  
  def mock_guardfile_content(content)
    File.stub!(:read).with(File.expand_path('../../../Guardfile', __FILE__)) { content }
  end
  
end