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-1

-00:00:00,160 --> 00:00:04,260

-White box testing, in general, and coverage criteria in particular, involve some

-

-2

-00:00:04,260 --> 00:00:07,550

-subtle concepts, so before I conclude this lesson, I want to have a

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-3

-00:00:07,550 --> 00:00:10,960

-few more quizzes to make sure that we all understand these concepts.

-

-4

-00:00:10,960 --> 00:00:13,610

-The first one involves a very simple piece of code, a straight line

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-5

-00:00:13,610 --> 00:00:16,540

-of code, three statements, in which we simply read an integer and

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-6

-00:00:16,540 --> 00:00:20,180

-then prints 10 divided by the value of that integer minus 3. Now,

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-7

-00:00:20,180 --> 00:00:22,250

-let's imagine that we have a test where there consists of three

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-8

-00:00:22,250 --> 00:00:25,250

-test cases for this code, and what I'm showing in the test cases

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-9

-00:00:25,250 --> 00:00:28,580

-is the input and the expected output. So for the first one,

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-10

-00:00:28,580 --> 00:00:31,280

-the input is 1, and I expect the output to be minus 5.

-

-11

-00:00:31,280 --> 00:00:34,480

-For the second one, the input is minus 1, I'm expecting to

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-12

-00:00:34,480 --> 00:00:37,120

-have 2.5. And for the third one, the input is 0, and I'm

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-13

-00:00:37,120 --> 00:00:42,440

-expecting to have minus 3.3333 as the result. Now the first question

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-14

-00:00:42,440 --> 00:00:45,180

-I want to ask, is if we considered this test suite, and we

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-15

-00:00:45,180 --> 00:00:48,050

-run it on the code, does it achieve path coverage? And remember

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-16

-00:00:48,050 --> 00:00:50,960

-that path coverage is one of the strongest coverage criteria that we saw.