1 00:00:00,540 --> 00:00:04,920 So let's start running some tests for a render package, and I'm looking at the render package right 2 00:00:04,920 --> 00:00:09,420 now and that's in internal render and the file is called Render Echo. 3 00:00:10,140 --> 00:00:13,500 And the very first thing I want to test is this function. 4 00:00:13,500 --> 00:00:14,870 Add default data. 5 00:00:15,000 --> 00:00:19,530 So let's get started, first of all, to create the two files I know I'm probably going to need. 6 00:00:19,540 --> 00:00:26,760 The first one is to set up our environment set up, underscore Testico and the second one I will call 7 00:00:27,060 --> 00:00:28,920 render underscore test dutko. 8 00:00:32,920 --> 00:00:35,940 OK, so let's get our setups first. 9 00:00:36,660 --> 00:00:40,440 What do we need in order to test this function? 10 00:00:40,470 --> 00:00:46,160 Well it says add default data takes TD, which is a pointer to models template data. 11 00:00:46,170 --> 00:00:46,860 That's no problem. 12 00:00:46,860 --> 00:00:52,290 I can create a variable that's of type models, template data and pass a pointer to this function. 13 00:00:52,290 --> 00:00:52,840 That's easy. 14 00:00:53,460 --> 00:00:54,910 The second one is the request. 15 00:00:55,260 --> 00:00:59,940 Now, when this application is actually running, I have access to that request. 16 00:01:00,420 --> 00:01:05,250 But in this package I don't because I'm running a test. 17 00:01:05,250 --> 00:01:10,920 I'm not actually testing the entire application from Maine go right through to the very end of whatever 18 00:01:10,920 --> 00:01:11,940 the request might be. 19 00:01:12,540 --> 00:01:17,130 I'm just testing this one function at default data in isolation. 20 00:01:17,580 --> 00:01:21,870 And that means I need to build this request and I can't just build an empty request. 21 00:01:21,870 --> 00:01:22,590 That's trivial. 22 00:01:23,250 --> 00:01:27,380 What I need to do is build a request that has session data. 23 00:01:27,600 --> 00:01:33,690 So let's try building it first, just using a standard way of building an empty request object and see 24 00:01:33,690 --> 00:01:36,210 what happens without the session data, it will fail. 25 00:01:36,270 --> 00:01:37,530 Let's get started and try it anyway. 26 00:01:38,190 --> 00:01:42,350 So I'm going to, first of all, in my setup, underscore Testico. 27 00:01:42,360 --> 00:01:43,740 I'm going to create two variables. 28 00:01:43,770 --> 00:01:47,070 I'll create a session which I'm not going to use right now, but I will momentarily. 29 00:01:47,070 --> 00:01:48,210 So I'll set it up right now. 30 00:01:48,930 --> 00:01:54,090 That's a pointer to Excession manager and I'll also create a variable called Test App, and I'll tell 31 00:01:54,090 --> 00:01:55,260 you why I'm doing that in a minute. 32 00:01:55,260 --> 00:01:57,230 And that's a type config app config. 33 00:01:57,900 --> 00:02:02,910 The reason I'm creating test app is because if you look at render Dongo, the application variable is 34 00:02:02,910 --> 00:02:05,850 actually stored or created right here in the package. 35 00:02:05,980 --> 00:02:13,770 OK, so I'm going to create my own copy of that and then make this variable app a pointer to the one 36 00:02:13,770 --> 00:02:16,740 that I create and I'll do that in setup test. 37 00:02:16,740 --> 00:02:17,490 I go now. 38 00:02:17,490 --> 00:02:22,800 Last time we created a function called Get Roots and that works fine and we could use the same approach 39 00:02:22,800 --> 00:02:25,290 right now and create a function that creates everything we need. 40 00:02:25,590 --> 00:02:29,790 Or we can use the built in one which we did much earlier in the course, and we'll do it again now. 41 00:02:29,790 --> 00:02:35,430 But just to remind you that it exists and that's the function called Test Me, and it takes a parameter 42 00:02:35,850 --> 00:02:40,950 which I call M, and that's a pointer to testing done m not testing that T. 43 00:02:41,580 --> 00:02:50,100 And then at the very end of this function we call os x it not executable exit, but before it exits, 44 00:02:50,100 --> 00:02:51,360 it actually runs our tests. 45 00:02:51,360 --> 00:02:52,110 M not run. 46 00:02:52,890 --> 00:02:57,750 So remember this function gets called before any of the tests are run. 47 00:02:58,050 --> 00:03:01,500 It does whatever we tell it to do in the body of the function. 48 00:03:01,830 --> 00:03:05,070 Then just before it closes in is the application. 49 00:03:05,070 --> 00:03:06,110 It runs our tests. 50 00:03:06,480 --> 00:03:13,080 So in here I need to set up certain things and I can get that information again from Command Mango. 51 00:03:13,350 --> 00:03:16,680 And just getting the top part of what we have in here. 52 00:03:16,920 --> 00:03:17,790 This is what I need. 53 00:03:17,790 --> 00:03:22,800 I need the sessional information, so I'll copy that and then I'll paste it and I need to make a few 54 00:03:22,800 --> 00:03:26,610 changes so I'm not going to be working with App directly. 55 00:03:26,610 --> 00:03:33,000 Instead, I'll use this variable test app, put it in there, put it in there. 56 00:03:33,480 --> 00:03:38,640 And I can't call app in production, but I'll just say this fault because we're not running an HDTV 57 00:03:38,660 --> 00:03:41,760 server so we can leave that set of faults for testing purposes. 58 00:03:42,780 --> 00:03:51,930 And then just before the application runs the tests, I say app is equal to a to test app and that populates 59 00:03:51,930 --> 00:03:57,450 this this one command right here after I set everything up and test out it, make sure that app which 60 00:03:57,450 --> 00:04:02,640 is declared in rendered ago, it makes sure that this variable has the things I needed to have. 61 00:04:03,120 --> 00:04:04,920 So that's my setup right now. 62 00:04:04,950 --> 00:04:07,530 OK, so that's probably sufficient for the moment. 63 00:04:08,220 --> 00:04:11,430 Let's go back to our render test and start writing test. 64 00:04:11,430 --> 00:04:15,840 And the application function that we want to test is called a default data. 65 00:04:15,840 --> 00:04:22,710 So let's copy its name back to render, test and create a function function test with a capital T, 66 00:04:23,310 --> 00:04:30,780 add default data and add default data is going to be of type T that takes a parameter a pointer to testing 67 00:04:31,080 --> 00:04:33,450 T and it doesn't return anything. 68 00:04:33,960 --> 00:04:36,420 So what do we do in this function? 69 00:04:36,430 --> 00:04:41,520 Well, if you actually look at the application function itself, it's pretty straightforward. 70 00:04:42,300 --> 00:04:45,450 It takes a couple of arguments and it's over in the render package. 71 00:04:45,450 --> 00:04:49,680 It takes TD, which is a pointer to models template data, and then it takes a request. 72 00:04:50,700 --> 00:04:55,380 So let's go back and call it so we can call it just like this. 73 00:04:55,380 --> 00:04:59,910 We can first of all create an empty TD variable, which is a type models template data. 74 00:05:00,070 --> 00:05:05,770 That's his first argument, and then we need a request now, we could do it like this, we could say 75 00:05:05,770 --> 00:05:06,340 our. 76 00:05:07,390 --> 00:05:13,330 I don't know if it is an error or not, I think it does is a sign the value of HDP new request. 77 00:05:13,750 --> 00:05:16,960 Yes, that returns an error and it requires a method. 78 00:05:17,380 --> 00:05:18,160 Get her post. 79 00:05:18,160 --> 00:05:19,180 What would she get? 80 00:05:20,290 --> 00:05:21,390 It requires you earn. 81 00:05:21,430 --> 00:05:22,270 That can be anything. 82 00:05:22,510 --> 00:05:23,260 Just some. 83 00:05:23,260 --> 00:05:27,010 You are we're not going to do anything with you IRL, so we can just put whatever we want in there. 84 00:05:27,610 --> 00:05:29,050 And it requires a body. 85 00:05:29,050 --> 00:05:30,430 But I'm not going to pass to the body. 86 00:05:30,430 --> 00:05:34,150 I want to pass it nil because really I'm just making a request to you, Earl. 87 00:05:34,150 --> 00:05:35,950 I'm trying to get a request. 88 00:05:36,700 --> 00:05:38,380 So that will create one for us. 89 00:05:38,380 --> 00:05:39,340 And I can check for an error. 90 00:05:39,340 --> 00:05:44,320 If error is not equal to nil, then teig error error. 91 00:05:44,860 --> 00:05:46,480 And that will that will fail our test. 92 00:05:46,900 --> 00:05:48,130 So now I have a request. 93 00:05:48,130 --> 00:05:51,790 So let's try calling that that function. 94 00:05:51,790 --> 00:05:53,710 This one over here render an rendered. 95 00:05:53,710 --> 00:05:55,570 OK, we're going to add default data. 96 00:05:55,660 --> 00:06:04,990 So let's call it we can say result is assigned, add default data and we can pass it our TD and our 97 00:06:04,990 --> 00:06:05,560 request. 98 00:06:06,160 --> 00:06:08,740 And then of course we need to do something with that. 99 00:06:08,740 --> 00:06:13,990 So I can say if result is equal to nil, then teig error. 100 00:06:13,990 --> 00:06:15,310 It doesn't matter what I'm doing here. 101 00:06:15,310 --> 00:06:17,650 It's just tittered error failed. 102 00:06:17,980 --> 00:06:24,340 OK, I know this isn't going to work, so I'm not too worried about getting too much right here in terms 103 00:06:24,340 --> 00:06:25,150 of error messages. 104 00:06:25,990 --> 00:06:27,220 So let's try this now. 105 00:06:27,670 --> 00:06:30,670 It wants a pointer to TD, so I have to make that a pointer there. 106 00:06:31,030 --> 00:06:32,230 Let's try running this test. 107 00:06:34,340 --> 00:06:35,450 Go, run. 108 00:06:35,480 --> 00:06:36,620 I'm in the right direction, am I? 109 00:06:37,130 --> 00:06:44,150 Yes, I'm in my internal render go past Dashty and it should fail and it will fail because it can't 110 00:06:44,150 --> 00:06:47,450 find any session data in the context. 111 00:06:48,260 --> 00:06:51,010 And that is a really serious clue as to what's going on. 112 00:06:51,020 --> 00:06:57,320 I actually panicked when I said no session data in context, and it tells me that error takes place 113 00:06:57,320 --> 00:06:59,030 in on a particular line. 114 00:06:59,060 --> 00:07:06,410 What I can show you where the error is, it's right here when it's trying to call this function right 115 00:07:06,410 --> 00:07:08,870 here at default data. 116 00:07:08,870 --> 00:07:15,680 I'm using the session here, all these pop string methods, and it's actually creating an error because 117 00:07:15,680 --> 00:07:18,680 there is no session data in that context. 118 00:07:18,680 --> 00:07:22,740 So it fails when it tries to get the data for flash or for error or for warning. 119 00:07:23,420 --> 00:07:31,190 So what we need to do is to change our test so that it has a request that has session data. 120 00:07:31,190 --> 00:07:34,100 And fortunately, that's not too difficult. 121 00:07:34,730 --> 00:07:38,750 So let's go back to our test and I'm going to create a new function below here. 122 00:07:38,920 --> 00:07:41,940 I'm going to call that func get session. 123 00:07:42,840 --> 00:07:45,290 OK, and that's going to do what? 124 00:07:45,410 --> 00:07:48,770 Well, when I call this, it's going to return to possible things. 125 00:07:49,400 --> 00:07:55,760 First of all, it's going to return a pointer to an HTTP request and it's potentially going to return 126 00:07:55,760 --> 00:07:56,240 an error. 127 00:07:56,270 --> 00:07:57,140 Something goes wrong. 128 00:07:57,890 --> 00:08:00,680 So let's see how we do this. 129 00:08:00,680 --> 00:08:06,480 To start with, I can cut this section out of here where I create a request and paste it in down there. 130 00:08:07,010 --> 00:08:14,550 Now, I can't do a t er I can just return nil an error because this isn't a testing function. 131 00:08:14,570 --> 00:08:16,160 This is not part of the testing package. 132 00:08:16,190 --> 00:08:17,800 This is a function we're creating ourself. 133 00:08:17,810 --> 00:08:20,640 Therefore I don't have access to that T variable that I do up here. 134 00:08:21,770 --> 00:08:23,600 So first of all, create this request. 135 00:08:23,600 --> 00:08:26,110 I know that's going to work because this is a request. 136 00:08:26,120 --> 00:08:29,020 This new request function is built right into the standard library. 137 00:08:29,030 --> 00:08:32,940 It's not going to give me an error, but it's good to get in the habit of trapping for those things. 138 00:08:33,470 --> 00:08:35,600 So at this point, I have a request object. 139 00:08:35,600 --> 00:08:41,180 I have a pointer to an HTP request, which is what I want to return, but I can't just return it or 140 00:08:41,180 --> 00:08:44,410 I'll be right back where I was before with no session data available. 141 00:08:45,020 --> 00:08:47,420 So what I'm going to do instead is create a context. 142 00:08:47,430 --> 00:08:51,950 I'll get the context from the request that we just built and I'll call that. 143 00:08:52,550 --> 00:08:56,990 That's my variable that's going to be pulled out of our request object that we just made. 144 00:08:57,200 --> 00:08:58,490 And it's just called context. 145 00:08:59,000 --> 00:09:02,050 And we use that every time we write to or read from the session. 146 00:09:02,060 --> 00:09:03,170 So you're familiar with that? 147 00:09:03,890 --> 00:09:09,140 Now that I have this, I need to put session data in there. 148 00:09:09,500 --> 00:09:11,540 And really, that's a one line command. 149 00:09:12,110 --> 00:09:18,170 So the syntax is as follows X and I don't care about the second parameter, so I'm going to ignore it 150 00:09:18,500 --> 00:09:20,510 is equal to session. 151 00:09:20,750 --> 00:09:24,530 That's our station manager load, not lifetime load. 152 00:09:25,760 --> 00:09:30,410 And it takes context, which is the variable that I'm actually working with right here. 153 00:09:30,560 --> 00:09:31,940 It requires the context. 154 00:09:33,020 --> 00:09:35,450 And then this is the part that makes it an active session. 155 00:09:35,460 --> 00:09:44,180 Our header douget and the key that it's looking for is X Dasch session exactly like that with a capital 156 00:09:44,180 --> 00:09:46,040 aspects and a capital S. 157 00:09:46,670 --> 00:09:52,580 And when I've done that, when I've actually put that into my context now I need to put my context back 158 00:09:52,580 --> 00:09:53,750 into my request. 159 00:09:54,050 --> 00:09:55,670 And again, that's a one line command. 160 00:09:55,820 --> 00:10:02,300 My request is now equal to my request with context and the context and putting it is the one on one 161 00:10:02,300 --> 00:10:08,600 that I just built up, the one that I added session data to, and now I can return error and nil. 162 00:10:09,620 --> 00:10:14,390 So I now have this function get session and back up here. 163 00:10:14,750 --> 00:10:22,940 I can actually make that work as follows by calling it error and error are equal to get the session. 164 00:10:23,360 --> 00:10:30,780 If error is not equal to nil, then I want to fill my test teda error here and that will fail the test. 165 00:10:31,310 --> 00:10:40,010 So at this point now when I call add default data, I can call it with my empty TD, my partner to my 166 00:10:40,010 --> 00:10:43,910 template data and the request that now has session information in it. 167 00:10:44,390 --> 00:10:46,880 But before I do that, I need something to test. 168 00:10:47,000 --> 00:10:51,450 So let's put something in our flash, for example, session. 169 00:10:51,830 --> 00:10:55,370 Put context is our context. 170 00:10:58,390 --> 00:11:03,310 I want to store in the variable special variable flash, I want to put the values one to three. 171 00:11:04,600 --> 00:11:11,620 So now that I've put it in the session and called add default data, at this point, I instead of checking 172 00:11:11,620 --> 00:11:19,390 to see if result is nil, I can say if results flash is not equal to one, two, three, then I can 173 00:11:19,390 --> 00:11:21,010 give it a more meaningful error message. 174 00:11:22,060 --> 00:11:27,720 Flash value of one, two, three, not found in session. 175 00:11:28,570 --> 00:11:31,300 And this should work unless we missed something. 176 00:11:31,330 --> 00:11:39,730 So let's give it a try back over here, clear the screen, go test ASV and it failed flash value of 177 00:11:39,730 --> 00:11:41,500 one, two, three, not found in session. 178 00:11:41,510 --> 00:11:42,630 So what did I miss? 179 00:11:42,670 --> 00:11:43,510 Let's go back here. 180 00:11:44,780 --> 00:11:49,160 Well, that was stupid, if result flash is not equal to one, two, three. 181 00:11:49,280 --> 00:11:50,130 Let's try that again. 182 00:11:50,330 --> 00:11:53,390 Go back over to here and run the test. 183 00:11:54,890 --> 00:11:57,650 And that's exactly what I wanted. 184 00:11:58,010 --> 00:11:58,550 All right. 185 00:11:58,550 --> 00:12:01,360 So now I've tested the first function in the next lecture. 186 00:12:01,370 --> 00:12:06,260 Let's work on template cash and all the other functions that we need to test.