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diff --git a/usth/ICT2.7/P4L3 White-Box Testing Subtitles/3 - Coverage Criteria Intro - lang_en_vs4.srt b/usth/ICT2.7/P4L3 White-Box Testing Subtitles/3 - Coverage Criteria Intro - lang_en_vs4.srt deleted file mode 100644 index b1a38a7..0000000 --- a/usth/ICT2.7/P4L3 White-Box Testing Subtitles/3 - Coverage Criteria Intro - lang_en_vs4.srt +++ /dev/null @@ -1,171 +0,0 @@ -1 -00:00:00,320 --> 00:00:04,059 -So let's start our lesson on white docs testing by considering again the - -2 -00:00:04,059 --> 00:00:07,470 -program PrintSum. If you remember, this is the same program that we used when - -3 -00:00:07,470 --> 00:00:10,300 -we were talking about black box testing. It's the program that takes two - -4 -00:00:10,300 --> 00:00:14,050 -integers, A and B, and produces, as a result, the sum of the two. - -5 -00:00:14,050 --> 00:00:16,570 -And when we were looking at this problem in the context of black - -6 -00:00:16,570 --> 00:00:17,760 -box testing, we did not look at - -7 -00:00:17,760 --> 00:00:19,700 -implementation. But that's exactly what we're going to - -8 -00:00:19,700 --> 00:00:22,090 -do now. So we're going to open the box and look at how the - -9 -00:00:22,090 --> 00:00:25,700 -code is implemented. And as you can see, the programmer was kind of creative. - -10 -00:00:25,700 --> 00:00:28,670 -Because instead of just adding the two numbers and printing them, he - -11 -00:00:28,670 --> 00:00:32,080 -or she also decided to print them in a specific color depending - -12 -00:00:32,080 --> 00:00:36,840 -on whether they were positive numbers or negative numbers. So positive results - -13 -00:00:36,840 --> 00:00:40,040 -are printed in red and negative results are printed in blue. And as - -14 -00:00:40,040 --> 00:00:41,970 -you can see by looking at the code we can see some - -15 -00:00:41,970 --> 00:00:45,150 -interesting cases that we might want to test. For instance you can - -16 -00:00:45,150 --> 00:00:48,190 -see that there are two decisions made here. So we might decide - -17 -00:00:48,190 --> 00:00:51,100 -that this is an interesting case and therefore we want to test it. - -18 -00:00:51,100 --> 00:00:53,770 -Similarly we might look at this other case and we might - -19 -00:00:53,770 --> 00:00:56,465 -also decide that this is another interesting case and therefore we - -20 -00:00:56,465 --> 00:00:58,970 -want to test this one as well. So let's discuss this - -21 -00:00:58,970 --> 00:01:01,480 -in a slightly more formal way by introducing the concept of - -22 -00:01:01,480 --> 00:01:05,110 -coverage criteria which are really the essence of why box testing. - -23 -00:01:05,110 --> 00:01:08,930 -First of all coverage criteria are defined in terms of test - -24 -00:01:08,930 --> 00:01:13,460 -requirements where test requirements are the elements, the entities in the - -25 -00:01:13,460 --> 00:01:16,250 -code that we need to exercise. That we need to execute - -26 -00:01:16,250 --> 00:01:18,690 -in order to satisfy the criteria. And we'll see plenty - -27 -00:01:18,690 --> 00:01:21,430 -of examples of that. And normally, when I apply a coverage - -28 -00:01:21,430 --> 00:01:24,810 -criterion, my result is a set of test specifications. And we - -29 -00:01:24,810 --> 00:01:26,540 -already saw test specifications. Those - -30 -00:01:26,540 --> 00:01:29,540 -are basically descriptions, specifications, of how - -31 -00:01:29,540 --> 00:01:32,786 -the tests should be in order to satisfy the requirements. And - -32 -00:01:32,786 --> 00:01:36,210 -they also result in actual test cases, which are instantiations of - -33 -00:01:36,210 --> 00:01:39,470 -the test specifications. And again this is exactly analogous to what - -34 -00:01:39,470 --> 00:01:41,830 -we saw when we were talking about the black box testing. - -35 -00:01:41,830 --> 00:01:43,960 -So let's see what this means by going back to our - -36 -00:01:43,960 --> 00:01:46,680 -example. A minute ago, we looked at the print sum code - -37 -00:01:46,680 --> 00:01:50,000 -and we identified two interesting cases for our code. And those - -38 -00:01:50,000 --> 00:01:53,430 -are exactly our test requirements. So we have a first test - -39 -00:01:53,430 --> 00:01:57,840 -requirement here, which is the execution of this particular statement and - -40 -00:01:57,840 --> 00:02:01,500 -a second requirement here and this one corresponds to the execution - -41 -00:02:01,500 --> 00:02:04,580 -of this other statement. So for this example there are two - -42 -00:02:04,580 --> 00:02:06,920 -things that we need to do in order to satisfy our - -43 -00:02:06,920 --> 00:02:10,100 -coverage requirements. Execute this statement and execute this statement. |