Add command line help

features/help.feature

@@ -0,0 +1,15 @@
+Feature: Showing help
+  In order to harness the full power of cucover
+  As a developer
+  I want to see help explaining cucovers usage
+
+  Background:
+    Given I am using the simple example app
+
+  Scenario: --help
+    When I run cucover --help
+    Then I should see "Usage: cucover -- [options] [ [FILE|DIR|URL][:LINE[:LINE]*] ]+"
+
+  Scenario: invalid command line handle
+    When I run cucover --invalid-thingy
+    Then I should see "Usage: cucover -- [options] [ [FILE|DIR|URL][:LINE[:LINE]*] ]+"

features/step_definitions/main_steps.rb

@@ -33,4 +33,9 @@
   end
 
   strip_trailing_spaces(strip_duration(@out)).should == expected_text
-end
+end
+
+Then /^I should see "([^\"]*)"$/ do |expected_text|
+  @out.should =~ /#{Regexp.escape(expected_text)}/
+end
+

lib/cucover/cli.rb

@@ -11,18 +11,40 @@ def start
     private
 
     def command_type
-      if @args.index('--')
+      case @args.first
+      when '--'
         CliCommands::Cucumber
-      elsif @args.index('--version')
+      when '--version', '-v'
         CliCommands::Version
-      elsif @args.index('--coverage-of')
+      when '--coverage-of', '-c'
         CliCommands::CoverageOf
-      elsif @args.index('--show-recordings')
+      when '--show-recordings', '-s'
         CliCommands::ShowRecordings
       else
-        raise("Sorry: I don't understand these command line arguments: #{@args.inspect}. Soon I will say something more helpful here.")
+        puts help
+        Kernel.exit(0)
       end
     end
 
+      def help
+        <<-EOH
+Usage: cucover -- [options] [ [FILE|DIR|URL][:LINE[:LINE]*] ]+
+
+Examples:
+cucover -- --format pretty features
+cucover --coverage-of lib/monkeys.rb
+cucover --show-recordings
+
+    -- [ARGS]                               Run cucumber while recording coverage. This will skip scenarios 
+                                            if they have already been run and the covering code has not
+                                            been changed.
+    -c [FILE], --coverage-of [FILE]         Show file with feature coverage information
+    -s,        --show-recordings            Show all coverage information currently recorded
+    -v,        --version                    Show version
+    -h,        --help                       You're looking at it.
+
+EOH
+      end
+
   end
 end