Added check to see if config file is empty and output, added relevant unit test

Author: jwarykowski

lib/cukesparse.rb

@@ -58,7 +58,9 @@ def build_command
 
     # Checks for task in arguments
     def check_for_task
+      return abort 'ERROR: Your tasks.yml file is empty!'.red.underline unless @config
       task = argv & @config.keys
+
       return abort 'ERROR: No task was passed to cukesparse!'.red.underline if task.empty?
       return puts 'WARN: Multiple tasks have been passed!'.yellow if task.length > 1
       return @task = @config[task[0]]

spec/cukesparse/check_for_task_spec.rb

@@ -6,6 +6,16 @@
     Cukesparse.reset!
   end
 
+  context "when run with task defined and empty config file" do
+    it "will return an error if config is empty" do
+      ARGV.push('test_task')
+      Cukesparse.config_file = File.join(fixture_path, 'empty_tasks.yml')
+      Cukesparse.load_config
+      Cukesparse.should_receive("abort").with("\e[4;31;49mERROR: Your tasks.yml file is empty!\e[0m")
+      Cukesparse.check_for_task
+    end
+  end
+
   context "when run with no task defined" do
     it "will return an error if no task is provided" do
       ARGV.push('incorrect_task')