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So, now that we have our test specifications. Test specification number one that

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says that a plus b must be greater than zero. And test specification

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number two, for which a plus b must be less than zero. I'd

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like to do another small quiz and ask you to write some test

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cases that will implement these specifications. And I want you to write the

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test cases in this format. I want you to specify for each one

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of the test cases, what is the value of a that you need

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to use. What is the value of b that you need to use.

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And since a test case, I like to remind you, is

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not just a set of inputs. But is the set of

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inputs plus expected output? I also want you to specify, what

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is the expected output for these test cases? And in particular,

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since we have two characteristics of the output, one is the

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color of the output and the other one is the actual

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value. I want you to specify for each test case, what

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is the expected output color and what is the expected value?