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-1
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-Obviously there are many possible tests that we can use to
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-2
-00:00:03,010 --> 00:00:05,910
-reach 100% branch and condition coverage. So I'm just going to show a
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-3
-00:00:05,910 --> 00:00:08,740
-possible one, which is x equal to 3 and y is
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-4
-00:00:08,740 --> 00:00:11,410
-equal to negative 2. If we specify this as case, you can
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-5
-00:00:11,410 --> 00:00:14,900
-see that the overall condition is false, because neither x is
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-6
-00:00:14,900 --> 00:00:17,990
-equal to 0 nor y is greater than 0. Therefore we will
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-7
-00:00:17,990 --> 00:00:22,420
-follow the false, false branch, and achieve 100% branch and condition coverage
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-8
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-for this code. And we might require to be even more thorough,
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-9
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-that all the combinations of our conditions inside each
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-10
-00:00:28,690 --> 00:00:31,790
-decision, inside each predicate, are tested. Which is what is
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-11
-00:00:31,790 --> 00:00:36,010
-called, multiple condition coverage. But because of the way
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-12
-00:00:36,010 --> 00:00:39,050
-this criterion is defined, it is combinatorial, becuse you have
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-13
-00:00:39,050 --> 00:00:42,220
-to consider all the possible combinations of conditions. And
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-14
-00:00:42,220 --> 00:00:45,210
-therefore it's extremely expensive, to the point of being impractical.
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-15
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-So instead of defining that criterion, we're going to find
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-16
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-another one which finds a good trade off between thoroughness
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-17
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-of the tests and their cost.