Add an option to fail with the first assertion.

bin/peck

@@ -15,6 +15,7 @@ Usage: peck [options] [files]
   -t, --match-text         run tests that match a given string
   -a, --recently-accessed  run tests that have been updated in the last 15 minutes
   -S, --no-strip-backtrace doesn't strip anything from the backtrace
+  -f, --fail-fast          fail with the first failing assertion
   -d, --debug              log debug messages to stdout
   -h, --help               show this message
   EOF
@@ -42,6 +43,10 @@ if options.first['S'] || options.first['no-strip-backtrace']
   Peck.clean_backtrace = false
 end
 
+if options.first['f'] || options.first['fail-fast']
+  Peck.fail_fast = true
+end
+
 unless (%w(d debug) & options.first.keys).empty?
   require File.expand_path('../../lib/peck/debug', __FILE__)
 end

lib/peck.rb

@@ -30,6 +30,9 @@ class << self
 
     # Sets whether the backtrace should be cleaned in case of a failure
     attr_accessor :clean_backtrace
+
+    # Sets whether Peck should exit at the first failing assertion
+    attr_accessor :fail_fast
   end
 
   # A no-op unless you require 'peck/debug'