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+1
+00:00:00,190 --> 00:00:03,010
+Obviously there are many possible tests that we can use to
+
+2
+00:00:03,010 --> 00:00:05,910
+reach 100% branch and condition coverage. So I'm just going to show a
+
+3
+00:00:05,910 --> 00:00:08,740
+possible one, which is x equal to 3 and y is
+
+4
+00:00:08,740 --> 00:00:11,410
+equal to negative 2. If we specify this as case, you can
+
+5
+00:00:11,410 --> 00:00:14,900
+see that the overall condition is false, because neither x is
+
+6
+00:00:14,900 --> 00:00:17,990
+equal to 0 nor y is greater than 0. Therefore we will
+
+7
+00:00:17,990 --> 00:00:22,420
+follow the false, false branch, and achieve 100% branch and condition coverage
+
+8
+00:00:22,420 --> 00:00:25,400
+for this code. And we might require to be even more thorough,
+
+9
+00:00:25,400 --> 00:00:28,690
+that all the combinations of our conditions inside each
+
+10
+00:00:28,690 --> 00:00:31,790
+decision, inside each predicate, are tested. Which is what is
+
+11
+00:00:31,790 --> 00:00:36,010
+called, multiple condition coverage. But because of the way
+
+12
+00:00:36,010 --> 00:00:39,050
+this criterion is defined, it is combinatorial, becuse you have
+
+13
+00:00:39,050 --> 00:00:42,220
+to consider all the possible combinations of conditions. And
+
+14
+00:00:42,220 --> 00:00:45,210
+therefore it's extremely expensive, to the point of being impractical.
+
+15
+00:00:45,210 --> 00:00:47,610
+So instead of defining that criterion, we're going to find
+
+16
+00:00:47,610 --> 00:00:51,000
+another one which finds a good trade off between thoroughness
+
+17
+00:00:51,000 --> 00:00:52,815
+of the tests and their cost.