diff options
Diffstat (limited to 'usth/ICT2.7/P4L2 Black-Box Testing Subtitles/13 - Partition Testing Example - lang_en_vs4.srt')
| -rw-r--r-- | usth/ICT2.7/P4L2 Black-Box Testing Subtitles/13 - Partition Testing Example - lang_en_vs4.srt | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/usth/ICT2.7/P4L2 Black-Box Testing Subtitles/13 - Partition Testing Example - lang_en_vs4.srt b/usth/ICT2.7/P4L2 Black-Box Testing Subtitles/13 - Partition Testing Example - lang_en_vs4.srt deleted file mode 100644 index 6738346..0000000 --- a/usth/ICT2.7/P4L2 Black-Box Testing Subtitles/13 - Partition Testing Example - lang_en_vs4.srt +++ /dev/null @@ -1,167 +0,0 @@ -1 -00:00:00,120 --> 00:00:02,969 -So let's look at how this will work with an example. - -2 -00:00:02,969 --> 00:00:06,210 -I'm going to use this simple program that takes two inputs. The - -3 -00:00:06,210 --> 00:00:08,790 -first input is a string, str, and the second one is - -4 -00:00:08,790 --> 00:00:11,575 -an integer, size. And the problem is called split. And as - -5 -00:00:11,575 --> 00:00:14,363 -the name says what it does is to take this string, - -6 -00:00:14,363 --> 00:00:17,491 -str, and split it into sub string, into chunks of size - -7 -00:00:17,491 --> 00:00:21,550 -characters each. So how do we identify some possible partitions for - -8 -00:00:21,550 --> 00:00:25,620 -this program? If we consider the input size, we can identify - -9 -00:00:25,620 --> 00:00:29,630 -three neutral partitions which are size less than 0. For example, - -10 -00:00:29,630 --> 00:00:32,259 -we want to test how the program behaves. But if we pass an - -11 -00:00:32,259 --> 00:00:36,100 -incorrect size, size equal to 0, which is also a partition. In - -12 -00:00:36,100 --> 00:00:39,390 -this case, a partition with a single element. And the third case - -13 -00:00:39,390 --> 00:00:42,540 -is size greater than 0, which I will consider to be - -14 -00:00:42,540 --> 00:00:44,960 -kind of the standard case. And actually let me do a, you - -15 -00:00:44,960 --> 00:00:48,220 -know, slight aggression so when I was talking about designer bias. So - -16 -00:00:48,220 --> 00:00:50,630 -this is a case in which designer bias might not make you - -17 -00:00:50,630 --> 00:00:53,050 -think of using size less than 0 because you read the - -18 -00:00:53,050 --> 00:00:56,210 -spec. And you sort of assume that the size will be positive. - -19 -00:00:56,210 --> 00:00:58,556 -Whereas the right thing to do when we test is to consider - -20 -00:00:58,556 --> 00:01:01,700 -the complete domain rather than just parts of it. So now let's - -21 -00:01:01,700 --> 00:01:04,760 -look at string, str, and let's see what kind of sub - -22 -00:01:04,760 --> 00:01:06,538 -domains we could identify for this - -23 -00:01:06,538 --> 00:01:08,670 -parameter. And notice another important aspect - -24 -00:01:08,670 --> 00:01:12,290 -here is that we treat each different part of the input independently, - -25 -00:01:12,290 --> 00:01:15,760 -which also helps breaking down the problem. One interesting sub domain is - -26 -00:01:15,760 --> 00:01:18,980 -the domain that includes all the strings whose length is less than - -27 -00:01:18,980 --> 00:01:22,310 -size. So all the strings that will not be displayed. Another subdomain - -28 -00:01:22,310 --> 00:01:25,000 -is all the strings with length which is between the value of - -29 -00:01:25,000 --> 00:01:28,350 -size and twice the value of size. A third subdomain is the one - -30 -00:01:28,350 --> 00:01:31,820 -including all the strings whose length is greater than twice the value - -31 -00:01:31,820 --> 00:01:35,140 -of size. And we can continue and identify more and more subdomain. - -32 -00:01:35,140 --> 00:01:38,350 -The key thing here is that we have to do that based - -33 -00:01:38,350 --> 00:01:41,180 -on the domain. So we need to adapt what we just did here - -34 -00:01:41,180 --> 00:01:44,620 -based on, on the specific domain involved and on the type - -35 -00:01:44,620 --> 00:01:47,190 -of data in this domain. So at this point we said that - -36 -00:01:47,190 --> 00:01:49,630 -there were two steps. One was to identify the subdomains and - -37 -00:01:49,630 --> 00:01:52,990 -the second one was to pick values in this subdomain. The values - -38 -00:01:52,990 --> 00:01:55,320 -that we'll actually use for the testing. In this case, we - -39 -00:01:55,320 --> 00:01:58,218 -do not want to just pick any value. Rather we want to - -40 -00:01:58,218 --> 00:01:59,871 -pick values that are particularly - -41 -00:01:59,871 --> 00:02:02,710 -interesting, particularly representative. So what does - -42 -00:02:02,710 --> 00:02:05,800 -that mean? Well, we're going to do that based on an intuitive idea. |