Organizando plugins e gems.

vendor/gems/thoughtbot-shoulda-2.10.1/test/fail_macros.rb

@@ -0,0 +1,34 @@
+module Shoulda
+  class << self
+    attr_accessor :expected_exceptions
+  end
+
+  module ClassMethods
+    # Enables the core shoulda test suite to test for failure scenarios.  For
+    # example, to ensure that a set of test macros should fail, do this:
+    #
+    #   should_fail do
+    #     should_validate_presence_of :comments
+    #     should_not_allow_mass_assignment_of :name
+    #   end
+    def should_fail(&block)
+      context "should fail when trying to run:" do
+        Shoulda.expected_exceptions = [Test::Unit::AssertionFailedError]
+        yield block
+        Shoulda.expected_exceptions = nil
+      end
+    end
+  end
+
+  class Context
+    # alias_method_chain hack to allow the should_fail macro to work
+    def should_with_failure_scenario(name, options = {}, &block)
+      if Shoulda.expected_exceptions
+        expected_exceptions = Shoulda.expected_exceptions
+        failure_block = lambda { assert_raise(*expected_exceptions, &block.bind(self)) }
+      end
+      should_without_failure_scenario(name, options, &(failure_block || block))
+    end
+    alias_method_chain :should, :failure_scenario
+  end
+end