Adding new feature - stubbing with arguments

features/method_stubs/stub_with_arguments.feature

@@ -0,0 +1,70 @@
+Feature: stub with arguments
+
+  You can set up more specific stubs by explicitly declaring the arguments the
+  method stub can be invoked with.
+
+  Scenario: the stub argument is not defined
+    Given a file named "stub_with_arguments_spec.rb" with:
+    """
+    class Account
+      def open(logger)
+        logger.log :open
+      end
+    end
+
+    describe Account do
+      subject { Account.new }
+
+      it "can open an account" do
+        logger = double('logger')
+        logger.stub(:log)
+        subject.open logger
+      end
+    end
+    """
+    When I run `rspec stub_with_arguments_spec.rb`
+    Then the examples should all pass
+
+  Scenario: the stub argument is defined
+    Given a file named "stub_with_arguments_spec.rb" with:
+    """
+    class Account
+      def open(logger)
+        logger.log :open
+      end
+    end
+
+    describe Account do
+      subject { Account.new }
+
+      it "can open an account" do
+        logger = double('logger')
+        logger.stub(:log).with(:open)
+        subject.open logger
+      end
+    end
+    """
+    When I run `rspec stub_with_arguments_spec.rb`
+    Then the examples should all pass
+
+  Scenario: the stub argument is defined but it's other than the actual value
+    Given a file named "stub_with_arguments_spec.rb" with:
+    """
+    class Account
+      def open(logger)
+        logger.log :open
+      end
+    end
+
+    describe Account do
+      subject { Account.new }
+
+      it "can open an account" do
+        logger = double('logger')
+        logger.stub(:log).with(:something_different)
+        subject.open logger
+      end
+    end
+    """
+    When I run `rspec stub_with_arguments_spec.rb`
+    Then the output should contain "1 example, 1 failure"