Updated test doubles (markdown)

John Norman commited 2016-10-02 17:47:50 -0500 commit af3841f12f4488fba1fff873265c6fa034eabc03

				test-doubles.md
			
          @@ -6,6 +6,17 @@ The thing we are testing is called a "System under test" (SUT) (XTD) or "object 

           ![](images/metz-poodr-testing.png)

          +### Testing messages received from others

          +

          +When we receive a message from another object, we want to verify a state change in our own object.

          +

          +Example: Suppose we have an object that converts fahrenheit to celsius. When we pass in a measurement

          +in fahrenheit, we want to verify that the computation of the celsius value is correct.

          +

          +### Testing messages sent to others

          +

          +When we send a message to another object that results in a side effect, we want to verify the side effect.

          +

           * SUT - System under test

           * DOC - Depended-on component

           * "indirect input" - This is data that gets into the SUT from a DOC. I.e., we're not calling a method with parameters; inputs are getting into the SUT via some DOC. (126)

...	...	@@ -6,6 +6,17 @@ The thing we are testing is called a "System under test" (SUT) (XTD) or "object
6	6
7	7	![](images/metz-poodr-testing.png)
8	8
	9	+### Testing messages received from others
	10	+
	11	+When we receive a message from another object, we want to verify a state change in our own object.
	12	+
	13	+Example: Suppose we have an object that converts fahrenheit to celsius. When we pass in a measurement
	14	+in fahrenheit, we want to verify that the computation of the celsius value is correct.
	15	+
	16	+### Testing messages sent to others
	17	+
	18	+When we send a message to another object that results in a side effect, we want to verify the side effect.
	19	+
9	20	* SUT - System under test
10	21	* DOC - Depended-on component
11	22	* "indirect input" - This is data that gets into the SUT from a DOC. I.e., we're not calling a method with parameters; inputs are getting into the SUT via some DOC. (126)