Description
Automated tests are a power multiplier as they help us make sure that changes to the code or to the environment don't have unintended changes in the results.
Therefore contributing tests to an open source project is very valuable.
It is usually also easier than contributing a feature or fixing a bug as you "only" need to know how to use the project, you don't have understand the code. At least not as deeply as you would need to make changes to the project.
During this hands on workshop you will learn how to find out what tests are missing, you will learn how to write a test and you will send a Pull-Request.
Prerequisite: You need to have an account on GitHub, you need to have your Rust tool-chain set up on your computer, you need to pick a crate, or other Rust project you'd like to contribute to.
We will do several steps. In each step:
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I'll demonstrate what to do.
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You will try to follow the what I did.
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I'll help you with any issues you might encounter.
Links and Notes
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We had some workshop elements in this session, but basically I ended up showing how to generate a test coverage report and a mutation testing report. Then I generated a test to cover some more lines of the code-base using Google Antigravity.
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The OSDC Rust page where I collect the ideas how to select a project, what to contribute, and what did we do during the previous sessions.
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The Pull Request
Transcription
1 00:00:00.720 --> 00:00:02.840 Saile: Meeting is being recorded.
2 00:00:02.840 --> 00:00:19.179 Gabor Szabo: So, hello, and welcome to the Code Maven YouTube channel, if you are watching this on YouTube, and welcome to the session, which is… either you call it Code Maven, that's the global name, or Rust Maven, because we are talking specifically about Rust.
3 00:00:19.310 --> 00:00:21.230 Gabor Szabo: My name is Gabor Szabo.
4 00:00:21.850 --> 00:00:40.729 Gabor Szabo: I am the host of this event, and in this time, we have lots of events. If you go to live… I'll share the screen, actually, and I'll explain. That's much easier than just speaking, so…
5 00:00:41.450 --> 00:00:50.950 Gabor Szabo: Hopefully, you can see my screen now, yeah. Okay, so here there is this website, the Live Code Maven, and I turn on the beeps, so we won't…
6 00:00:51.310 --> 00:00:53.130 Gabor Szabo: Play drone, okay.
7 00:00:53.170 --> 00:00:55.260 Gabor Szabo: So, it won't bother us.
8 00:00:55.260 --> 00:01:17.820 Gabor Szabo: Anyway, this is the Live Code Maven website, probably you're familiar with it. That's where we have the sessions. There are going to be this workshop and another workshop in Python I'm doing, and most of the others are guest speakers in various topics, so you are invited to look at them. I'll share it in the chat as well.
9 00:01:19.470 --> 00:01:27.330 Gabor Szabo: this time it's going to be a workshop, and we are going to try to contribute to some open source Rust project, and I've done this
10 00:01:27.330 --> 00:01:41.140 Gabor Szabo: quite a few of these already, and so I have this website called osdc.codemaven.com, and specifically this is the Rust page. I'm sharing this link as well in the
11 00:01:41.140 --> 00:01:53.929 Gabor Szabo: in the… in the chat, so you can visit it. In general, this open source… OSDC stands for Open Source Developer Development Conference, or course, or community, or whatever club, whatever you name it.
12 00:01:54.350 --> 00:01:57.370 Gabor Szabo: But the point here was that I had
13 00:01:57.510 --> 00:02:11.750 Gabor Szabo: quite a few sessions in which we were contributing to some open source project, and we had sessions in Rust, in Python, in Ruby, in Perl. These are the languages that I covered.
14 00:02:12.140 --> 00:02:14.150 Gabor Szabo: And here you can find notes.
15 00:02:14.150 --> 00:02:35.830 Gabor Szabo: on how to select a Rust project to contribute to, if you don't have one that is already… you want to contribute to this one specifically. You just want to find something and contribute to that project. So, various ways to pick a project. Then, I have a bunch of links, and this is now highlighted. Let's…
16 00:02:35.830 --> 00:02:49.509 Gabor Szabo: get rid of the search here. A bunch of things that you can contribute to. So, low level, low-hanging fruit, I would call, is, writing… configuring the CI.
17 00:02:50.290 --> 00:02:52.780 Gabor Szabo: I don't know, there is someone who's trying to…
18 00:02:52.780 --> 00:02:53.146 Saile: Oh, Mr.
19 00:02:53.330 --> 00:02:54.070 Gabor Szabo: Trying to speak?
20 00:02:54.070 --> 00:02:55.360 Saile: Take a time to speak!
21 00:02:55.720 --> 00:02:57.310 Antonin Malzieu Ridolfi: What side is echoing?
22 00:02:57.650 --> 00:02:59.069 Saile: What's savings and agreement.
23 00:03:00.830 --> 00:03:20.509 Gabor Szabo: Okay, if you have some comments, and you don't want to have it recorded, that's fine. Write it in the chat, and then I'll see it, and I can comment on it, and I won't even say your name, so no one will have to know that… who asked it, or… well, besides the ones who are already here.
24 00:03:22.050 --> 00:03:35.360 Gabor Szabo: So feel free to ask the questions in the chat. It's probably also better, especially if the voice is not that good, as we had some, but now. Anyway, so one of the things that you can…
25 00:03:35.360 --> 00:03:43.889 Gabor Szabo: relatively easily contribute is configuring the CI, the continuous integration. So most of the projects, especially the Rust projects, are on GitHub.
26 00:03:43.890 --> 00:04:08.219 Gabor Szabo: Because the crates I.O. is integrated with GitHub, for now, at least. You need an account on GitHub in order to upload something. So, most of the projects are on GitHub, or primarily on GitHub, and you can configure GitHub Actions, which basically will… what it will do is just run the tests whenever you put
27 00:04:08.220 --> 00:04:17.279 Gabor Szabo: out, or the author pushes out some changes. And then, of course, it's a good idea to have tests for that project, and
28 00:04:17.279 --> 00:04:26.640 Gabor Szabo: you, you won't believe how many projects are there on crates.io… on… yeah, so here.
29 00:04:27.150 --> 00:04:32.899 Gabor Szabo: wait a second, why do I have this banner here? Can I get rid of it? Can I get… oops, or…
30 00:04:33.660 --> 00:04:35.450 Gabor Szabo: I hate this when it happens.
31 00:04:36.860 --> 00:04:39.380 Gabor Szabo: Do you still see my share?
32 00:04:39.620 --> 00:04:46.250 Gabor Szabo: Or, stop share, I'll have to stop the share and share again.
33 00:04:48.090 --> 00:04:51.279 Gabor Szabo: There is some strange behavior in…
34 00:04:52.010 --> 00:04:59.070 Gabor Szabo: And then I minimize this so it won't bother us later. Okay, hopefully it's better now. So…
35 00:04:59.380 --> 00:05:02.099 Gabor Szabo: If we go to craze.io,
36 00:05:03.540 --> 00:05:20.189 Gabor Szabo: There are tons of crates here, and many of them are very good and well-tested and whatever, but there are also tons of them which are good beginner, good beginnings, without probably many tests, so you can encounter those.
37 00:05:20.190 --> 00:05:33.939 Gabor Szabo: And you can also find just projects on GitHub, which weren't even uploaded to craze.io, because they are not major enough, or I don't know, whatever reason, without,
38 00:05:34.220 --> 00:05:37.979 Gabor Szabo: without tests, or without enough tests.
39 00:05:38.010 --> 00:05:55.260 Gabor Szabo: So I thought… oh, and one couple of more things. You can run, if you are… so you can set up CI, then you can write tests, and that's the major thing we are trying to… going to try to do now, that… write some tests, and…
40 00:05:55.410 --> 00:06:12.259 Gabor Szabo: And here, Bill… and then, once you find the project that has already tests, you want to ask the question, what other tests you might want to write? So… and the way to find it out is that you can run… where is it?
41 00:06:14.900 --> 00:06:17.419 Gabor Szabo: Where is it? I don't see it now.
42 00:06:18.550 --> 00:06:21.180 Gabor Szabo: Yeah, it's here. Test coverage.
43 00:06:21.470 --> 00:06:34.359 Gabor Szabo: generate test coverage report, okay? So you can generate a test coverage report, and then from there you can see which tests are… which areas of the code were not executed while testing.
44 00:06:34.360 --> 00:06:52.169 Gabor Szabo: And that's a good idea to try to write a test to cover that area. So… and then if you have a good test coverage, then you can also go to something else which is called mutation testing, and I'm going to show you that as well, where what mutation test does
45 00:06:52.170 --> 00:07:01.770 Gabor Szabo: is takes your codebase, runs your tests. The tests are passing, okay, hopefully. If the tests are not passing, then you already know what to fix, okay? Because something is broken.
46 00:07:01.980 --> 00:07:17.209 Gabor Szabo: Either in the tests or in the code. But let's say the tests are passing, and let's say you have a very good test coverage. Now, you run the mutation test, what the mutation test does is changes your source code a little bit, maybe replacing,
47 00:07:17.450 --> 00:07:20.660 Gabor Szabo: Yeah, I'm recording. Am I not? Yeah, I'm recording.
48 00:07:21.490 --> 00:07:27.410 Gabor Szabo: Yeah, someone just right, kindly recorded. Okay, I'm recording, but when I said, I think, that I'm not…
49 00:07:27.870 --> 00:07:31.680 Gabor Szabo: Sure, what I'm going to do is this. Anyway, if I'm going to upload it.
50 00:07:31.690 --> 00:07:50.930 Gabor Szabo: Anyway, so you have the code base, and then the mutation testing changes your codebase a little bit. Let's say a plus sign replaces by the minus sign, okay? So everything is the same, except that in the computation, somewhere, a plus is replaced by the minus. And then runs the tests.
51 00:07:50.930 --> 00:07:57.990 Gabor Szabo: And the test… are expected to fail, right? Because now the code base changed. If the tests don't
52 00:07:58.360 --> 00:08:03.770 Gabor Szabo: didn't fail, okay? If the no test failed, that means that the test
53 00:08:03.940 --> 00:08:22.399 Gabor Szabo: are not properly verifying that area of the code. It might be that they are not covering at all, that the test coverage should have found it, okay? Or it might be that, you know, I've seen a codebase or tests where you have a
54 00:08:22.450 --> 00:08:25.580 Gabor Szabo: You run a tab, you run a function, You…
55 00:08:25.730 --> 00:08:41.219 Gabor Szabo: compute the result, but then you're in the test, but then you're not comparing it to some expected, result. Now, how this happens, I have theories, but probably it's just a mistake that the,
56 00:08:41.559 --> 00:08:48.489 Gabor Szabo: developer-made. Sometimes I saw code like this, that people, instead of verifying
57 00:08:48.530 --> 00:09:03.659 Gabor Szabo: with an assert, comparing to an expected result, instead of that printing out the result, and eyeballing it. So, looking at it and saying, okay, it's a good value. And that's how they think tests are.
58 00:09:03.930 --> 00:09:21.049 Gabor Szabo: this is… well, as long as they look at the value, it's good, but it means that they're not really verifying in the test that the value is correct. You have to compare it to some expected result. And so,
59 00:09:21.320 --> 00:09:22.989 Gabor Szabo: the mutation tests.
60 00:09:23.160 --> 00:09:30.960 Gabor Szabo: Can… will find these problems, because they will change the code, the code will still run, it will still generate some result.
61 00:09:31.000 --> 00:09:47.000 Gabor Szabo: And the code and the test will pass, because no one is… because it's not comparing to some expected result, which is different from what is actually generated. And so, if you go further on this page, scroll further down, you will find…
62 00:09:47.360 --> 00:09:55.660 Gabor Szabo: This… let's skip the Rust Digger for now, because I stopped running it. A bunch of projects that I hand… that I…
63 00:09:55.660 --> 00:10:12.010 Gabor Szabo: dealt with, and then you can see the dates when I dealt with on what session was there, and the links to the issues I opened, and the status as I… as I updated it, because it's not automatically updated. So let's say this was a pull request.
64 00:10:12.010 --> 00:10:26.189 Gabor Szabo: adding GitHub workflow, and it was merged. And this was an issue I opened, and it's still waiting for some response. And, there was a PR that I opened, and it was rejected without any comment.
65 00:10:26.190 --> 00:10:42.880 Gabor Szabo: And so, for example, this project, I will probably not contribute anymore, because there were, like, 4 PRs, 3 PRs, and they were all rejected, closed, basically, without any comments. Now, maybe the author implemented the same thing.
66 00:10:43.690 --> 00:10:48.389 Gabor Szabo: Himself, herself, whatever. But,
67 00:10:48.950 --> 00:11:01.769 Gabor Szabo: my PR was sort of rejected, so I would say, okay, I don't want to contribute to this person and to this project anymore, because my contribution is not really valued, okay?
68 00:11:01.810 --> 00:11:07.259 Gabor Szabo: Of course, not every rejection should
69 00:11:07.260 --> 00:11:22.669 Gabor Szabo: generate this reaction, but if you feel… and there's even a video recording of that, okay? Of that session, when I was doing this. So you have plenty of video recordings you might find here.
70 00:11:22.840 --> 00:11:37.720 Gabor Szabo: Anyway, there is a CSV create, which is a very… I don't know if it's popular, but it's, the author is a very well-known author, so it's a very good, create. And so…
71 00:11:37.720 --> 00:11:50.609 Gabor Szabo: I have it locally, and I wanted to show that one. So these were the… because it's a big one, and I'm going to get stuck with this, and so I will just show
72 00:11:50.740 --> 00:11:56.620 Gabor Szabo: That even there, we might have… even… even there, in such a,
73 00:11:57.100 --> 00:12:09.550 Gabor Szabo: well-maintained project, you might find issues. Now, you can see that here, too, I have to check whether they are still waiting, or they were… what happened to these… all the other things.
74 00:12:10.020 --> 00:12:12.280 Gabor Szabo: But you can see the comments I made.
75 00:12:12.840 --> 00:12:21.750 Gabor Szabo: So, I have… here, the Rust CSV project cloned.
76 00:12:22.020 --> 00:12:25.469 Gabor Szabo: So, I can come to this link.
77 00:12:25.740 --> 00:12:28.330 Gabor Szabo: Just to go to a whole,
78 00:12:29.320 --> 00:12:35.080 Gabor Szabo: I can close this one, I can close this one for now. This is the same thing.
79 00:12:35.570 --> 00:12:49.500 Gabor Szabo: This is something that I don't need for now. Oh, and I have the clock. Okay, so this is where the crate is. Andrew Gallant, also known as Burned Sushi.
80 00:12:49.730 --> 00:12:58.430 Gabor Szabo: is the author, or the maintainer, I don't know. I can click on the reposit… on the link to the repository. Most crates have that link.
81 00:12:59.070 --> 00:13:10.720 Gabor Szabo: I think not all of them, but most of them have. And then I took this one, and I cloned it with git clone. And then, so now I have… if I run it Git…
82 00:13:10.750 --> 00:13:27.110 Gabor Szabo: remote minus 3, I have the origin repo, which is from Burn Sushi, so that's the original one, and I have my own fork, this is my username on GitHub. And git pull…
83 00:13:27.140 --> 00:13:37.749 Gabor Szabo: origin master will update from the origin… from the origin. I think it's up to date because I just ran this 5 minutes before we started the session.
84 00:13:37.890 --> 00:13:56.020 Gabor Szabo: And now I can just basically run cargo test here, and it will run the test. And it's already compiled, because I read it earlier. And it was… it's pretty fast. Now, before I continue, I have this other window, and I wanted to run HTOP here.
85 00:13:56.290 --> 00:14:03.729 Gabor Szabo: So, we'll see… how much of my CPU is used?
86 00:14:03.970 --> 00:14:13.320 Gabor Szabo: So I have, like, 16 cores here, and it's not… not that bad. I mean, remember your Zoom used to take up a lot more. I think it's now…
87 00:14:13.570 --> 00:14:28.529 Gabor Szabo: better. So it has a load average of 3, as you can see here, which is not that bad. So I can go now to this page, and
88 00:14:31.290 --> 00:14:39.619 Gabor Szabo: find, try to find, because I never remember the commands, test coverage report using tarpaulin. Okay, so this is the link where
89 00:14:39.770 --> 00:14:52.779 Gabor Szabo: I wrote a blog post, basically, or it's a book, or whatever, there, because I don't remember how the comments are, I just write them in books or blog posts, and then I can find them easier.
90 00:14:52.780 --> 00:15:02.919 Gabor Szabo: So, cargo install, cargo tarpaulin would install this thing, this tool, which generates the test report.
91 00:15:03.570 --> 00:15:18.749 Gabor Szabo: And then you can run it in various flags. So here, this one will run cargo tarpauline HTML, that will generate an HTML report, this is a standard output report, and this will do both.
92 00:15:19.340 --> 00:15:26.129 Gabor Szabo: So… And there is a bug here in the slide. Anyway, I take this one.
93 00:15:26.420 --> 00:15:41.349 Gabor Szabo: and copy it, and run this command, okay? So now what it does, it runs the tests again, but this time it will collect information, which,
94 00:15:42.170 --> 00:15:45.800 Gabor Szabo: Lines of the code base.
95 00:15:46.080 --> 00:15:50.180 Gabor Szabo: were executed while the tests were running, and
96 00:15:52.320 --> 00:16:01.170 Gabor Szabo: Something, oh, broken? Test error? Test failed during run? What does that mean? Is this happening earlier?
97 00:16:01.540 --> 00:16:03.750 Gabor Szabo: Oh, there was a failure already!
98 00:16:03.940 --> 00:16:05.719 Gabor Szabo: Huh, I didn't notice.
99 00:16:08.370 --> 00:16:16.460 Gabor Szabo: Okay, I think it's… it… Okay, now I'm getting confused. I think it was… it was passing earlier, no?
100 00:16:16.600 --> 00:16:17.950 Gabor Szabo: Field, field?
101 00:16:30.130 --> 00:16:34.230 Gabor Szabo: Okay, now I'm sorry, I'll get… I ran the Garbo test again.
102 00:16:37.880 --> 00:16:40.339 Gabor Szabo: Wasn't it passing? Anyone remembers?
103 00:16:40.510 --> 00:16:43.010 Gabor Szabo: This is what happens when you do live coding.
104 00:16:47.910 --> 00:16:52.620 Gabor Szabo: So it… okay, I think I remember… I think specifically…
105 00:16:52.850 --> 00:17:02.049 Gabor Szabo: Some modules… so, okay, the tests are passing, but if I run cargo tarpaulin with this, I hope I pronounced properly.
106 00:17:02.430 --> 00:17:03.639 Gabor Szabo: First of all.
107 00:17:03.850 --> 00:17:15.640 Gabor Szabo: you see that it needs to recompile it, because it's working in a different way, which is a pretty… a little bit annoying. And now we can see that while it's running.
108 00:17:16.730 --> 00:17:30.909 Gabor Szabo: it has all kinds of things that are… get broken, okay? So, I know that tarpaulin doesn't work with every codebase, okay? There are issues. Now, on the other hand.
109 00:17:32.160 --> 00:17:39.490 Gabor Szabo: I think… This might… I mean, I don't know if this worked. I can work… use this one.
110 00:17:39.660 --> 00:17:41.619 Gabor Szabo: Let's try this one as well.
111 00:17:42.730 --> 00:17:46.520 Gabor Szabo: So, I… usually, what I do is I…
112 00:17:46.740 --> 00:18:00.930 Gabor Szabo: run everything inside a Docker container in order to make sure that whatever this random codebase, basically, does, okay, won't impact all of my computer.
113 00:18:00.940 --> 00:18:09.630 Gabor Szabo: Now, what you can see is that I'm running them… running it on… natively on my computer, which is on one hand scary,
114 00:18:09.980 --> 00:18:17.950 Gabor Szabo: On the other hand, it doesn't work either. So, bad example, okay, or one example that,
115 00:18:18.350 --> 00:18:35.279 Gabor Szabo: I can't show you the result for now. I will pick another module, another example, another create another example, but for… while we are… before we do this, I wanted to show one more thing, and this is the mutation testing, so…
116 00:18:37.650 --> 00:18:39.679 Gabor Szabo: No, this, not this one?
117 00:18:41.690 --> 00:18:54.930 Gabor Szabo: This one is my article, okay? So here you can find that this is also… you install it with cargo install… not that tarpaulin… cargo install, cargo mutants, and then you run cargo mutants.
118 00:18:55.180 --> 00:18:58.609 Gabor Szabo: That's it. There… you can find this article, I'll…
119 00:18:59.660 --> 00:19:13.159 Gabor Szabo: Paste it there. So this one now generates the mutants. It found… it generated 758 mutants, meaning in 758 different ways, it changed the codebase.
120 00:19:13.500 --> 00:19:20.509 Gabor Szabo: And it will run the tests on all Run all the tests, 758…
121 00:19:21.470 --> 00:19:35.950 Gabor Szabo: times. If we… if I switch to this screen now, you can see that it's, like, all of the… all of my cores are fully used, almost fully used, okay? The load average is now 12 already.
122 00:19:36.230 --> 00:19:39.450 Gabor Szabo: So… My computer is pretty, pretty busy.
123 00:19:39.570 --> 00:19:43.799 Gabor Szabo: And… when I ran this before the…
124 00:19:44.140 --> 00:19:57.340 Gabor Szabo: with the session, I actually stopped it pretty early, because I found this, what you can see also here. So, I found that there are syncs which are missed.
125 00:19:57.380 --> 00:20:05.139 Gabor Szabo: So, I think when it says missed, it means that it found a case where if you make some changes.
126 00:20:05.620 --> 00:20:09.560 Gabor Szabo: Then the still… the test will pass.
127 00:20:09.920 --> 00:20:16.659 Gabor Szabo: Okay? Unfortunately, I couldn't find how to…
128 00:20:16.860 --> 00:20:30.749 Gabor Szabo: limit the number… how to tell it to stop after the first missed one, okay? If anyone… so I'm going to stop it now, and what I promised is that I share this link as well, in case you…
129 00:20:30.790 --> 00:20:38.099 Gabor Szabo: want to… want to find it easily, but, you can find it from the… from the OSDC page.
130 00:20:38.760 --> 00:20:40.110 Gabor Szabo: Okay, so…
131 00:20:40.270 --> 00:20:48.370 Gabor Szabo: So that's… that's it. Now let me try to find another crate, and hopefully there I will be able to show, better.
132 00:20:49.360 --> 00:20:51.650 Gabor Szabo: what I wanted to… to show.
133 00:20:51.790 --> 00:20:52.940 Gabor Szabo: Damn.
134 00:20:53.790 --> 00:21:08.990 Gabor Szabo: But, wait a second, sorry, before that, I wanted to finish this one, this thought. So I said, let's get the help, and I even piped through less. I couldn't find a way to limit the number of mutants
135 00:21:08.990 --> 00:21:19.790 Gabor Szabo: probably I need to read the documentation for this, or ask ChatGTP, or how to do this, so it will stop the first… on the first missed, mutant.
136 00:21:19.990 --> 00:21:29.200 Gabor Szabo: Git status, mutants out, this is the…
137 00:21:29.390 --> 00:21:49.200 Gabor Szabo: I think it's totally different than what I remember. In any case, in this article that I shared with you, you can find an example that I used on the XMLM rust grid, and we can look at it now, maybe it will work for us now as well, where,
138 00:21:49.820 --> 00:21:58.780 Gabor Szabo: there were quite a few things that were missed, and then I made some improvements, so maybe we can do this again.
139 00:21:59.020 --> 00:22:03.999 Gabor Szabo: X… Let's see what happens here.
140 00:22:08.820 --> 00:22:10.920 Gabor Szabo: Okay, it's not here.
141 00:22:13.620 --> 00:22:16.509 Gabor Szabo: It's here, okay, git status.
142 00:22:16.800 --> 00:22:24.540 Gabor Szabo: Okay, so… I can remove all… everything from here. This is the other project out.
143 00:22:24.940 --> 00:22:27.210 Gabor Szabo: And… Ode?
144 00:22:27.360 --> 00:22:30.540 Gabor Szabo: And the tarpaulin report. Okay, let's clean this.
145 00:22:30.840 --> 00:22:31.710 Gabor Szabo: Git?
146 00:22:33.430 --> 00:22:35.500 Gabor Szabo: Remote?
147 00:22:35.670 --> 00:22:45.000 Gabor Szabo: So here, too, I have two remotes, the origin, which is where it came from, and my fork. So let's see this kit.
148 00:22:45.260 --> 00:22:47.200 Gabor Szabo: Pool Origin.
149 00:22:48.150 --> 00:22:49.740 Gabor Szabo: main here.
150 00:22:51.730 --> 00:22:56.729 Gabor Szabo: Just to make sure that it's up to date. Okay, so it's up to date, and now…
151 00:22:56.990 --> 00:23:07.110 Gabor Szabo: Because, sort of, I say, okay, I trust less this crate, I'm going to show you the one with the docker. So I have this alias.
152 00:23:09.560 --> 00:23:13.059 Gabor Szabo: DRROST, which is basically this command.
153 00:23:13.430 --> 00:23:19.049 Gabor Szabo: And I'm copy-pasting it for you, so you can… in case you would like to use this.
154 00:23:21.470 --> 00:23:27.670 Gabor Szabo: So I'm running this command. What it does, it runs, this, image.
155 00:23:28.210 --> 00:23:33.939 Gabor Szabo: this Docker image, it runs Bash inside it, it maps my directories.
156 00:23:34.050 --> 00:23:37.839 Gabor Szabo: And it also maps various other folders.
157 00:23:37.840 --> 00:23:58.590 Gabor Szabo: Because this Docker image, this is an image I created, this Docker image also contains installations of Copilot, of Codex, of Gemini, Gemini, whatever, how you say it. So if you have a configuration, you can use Dolos, because the clients are installed. So I say DR Rust.
158 00:23:59.480 --> 00:24:05.079 Gabor Szabo: And it copies it because I've removed the previous image.
159 00:24:06.240 --> 00:24:12.690 Gabor Szabo: The idea here is that I can Run inside this,
160 00:24:13.000 --> 00:24:27.709 Gabor Szabo: container, inside this Docker container, I can run any code, and it will only impact the folders that were mapped here, which is still too much, I think, because still these, they are mapping… all these folders are accessible to it.
161 00:24:27.710 --> 00:24:36.500 Gabor Szabo: But, at least it won't be able to access all of my computer, just these few folders, and…
162 00:24:36.790 --> 00:24:39.660 Gabor Szabo: The current folder of the current project.
163 00:24:40.040 --> 00:24:45.600 Gabor Szabo: And that's good, because I can also run any of the…
164 00:24:46.450 --> 00:25:03.819 Gabor Szabo: LM agents, LM coding agents, and I can let them do whatever they want, because they can, again, can't just randomly remove my hard disk or do all kinds of changes. They can only do this. So, okay, we are fine. Inside is this,
165 00:25:03.820 --> 00:25:15.280 Gabor Szabo: container in the slash OPT folder, but if I look at what's here, this is the same project that we saw earlier. Now I can run cargo test.
166 00:25:15.350 --> 00:25:19.460 Gabor Szabo: And, see what's going on, if it's a passive high.
167 00:25:24.600 --> 00:25:30.460 Gabor Szabo: is… is Rust Analyzer also running in the Docker container? So I'm not using it,
168 00:25:30.590 --> 00:25:50.080 Gabor Szabo: I mean, I don't think that I use Rust Analyzer here, and I'm not using an IDE. I think that's what you are going… referring to, that if I use StartCopilot, right, then… not cop… not Copilot, sorry, VS Code, or some IDE, that is using,
169 00:25:50.180 --> 00:25:58.650 Gabor Szabo: the… no, so if I start now VS Code, it's not configured to use the Docker container. That's,
170 00:25:58.770 --> 00:26:08.240 Gabor Szabo: something is lacking from my setup yet, okay? So that would use the… the… Run it on my computer.
171 00:26:08.880 --> 00:26:17.079 Gabor Szabo: Which is problematic, again, because it runs the code. But, yeah, well, whatever.
172 00:26:17.210 --> 00:26:18.670 Gabor Szabo: when I run…
173 00:26:19.010 --> 00:26:29.520 Gabor Szabo: the agents, then I don't even open the IDE, looking at the source code. I'm just telling the agents… I'll show you, probably. Let's see if I can get there, but maybe…
174 00:26:29.820 --> 00:26:36.629 Gabor Szabo: Well, what time is it? Anyway, test… the test passed. I want… I already want to… you to do something, so…
175 00:26:36.760 --> 00:26:44.969 Gabor Szabo: I just… this managed to do, the test passed, okay, cargo test. Now I go back to this,
176 00:26:45.390 --> 00:26:46.930 Gabor Szabo: The tarpauling?
177 00:26:47.460 --> 00:26:49.500 Gabor Szabo: Darba-ulin?
178 00:26:49.800 --> 00:26:51.700 Gabor Szabo: Command, this one…
179 00:26:51.990 --> 00:27:05.689 Gabor Szabo: So, this one is running, the test coverage report, generating the test coverage report. Hopefully, this will work.
180 00:27:06.380 --> 00:27:10.680 Gabor Szabo: In this crit. This is a much, much simpler crit, so…
181 00:27:11.540 --> 00:27:29.830 Gabor Szabo: here… oh, okay, sorry. So this problem is what is described in… on this page, that I get this ASLR disable fail whatever error, and that's where I need to add this one. So basically, the tarpaulin has
182 00:27:29.830 --> 00:27:34.199 Gabor Szabo: two, I think, two engines on how to,
183 00:27:34.620 --> 00:27:42.779 Gabor Szabo: monitor the source code, basically, how to monitor the execution, and one of them doesn't work inside the container. And the other one, which is
184 00:27:44.260 --> 00:27:49.879 Gabor Szabo: probably not so good, or I don't know what that's good, I don't… I'm not sure.
185 00:27:50.360 --> 00:28:08.469 Gabor Szabo: uses this flag, and… and I need to use that when I'm using inside a container. Anyway, now, this, what you can see here, is the out… is the report to the standard output, which says on which… on the source code, which line of code,
186 00:28:10.980 --> 00:28:30.650 Gabor Szabo: what is covered or uncovered, what is not covered. Okay, uncovered? Why is it uncovered? I don't know, it should be not covered, probably. But I'm not an English native, so I don't know. And it also created this file in OPT tarpaulin report. Now, this is, let me open another tab here.
187 00:28:32.400 --> 00:28:51.080 Gabor Szabo: Though it's inside… inside the container, it says slash OPT, tarpaulin report, but the slash OPT is mapped to the outside folder, so if I visit the same folder outside its status, then you can find this page here, and then I can open it
188 00:28:51.680 --> 00:28:56.960 Gabor Szabo: This X is just an alias for me to open a… whatever you open.
189 00:28:58.630 --> 00:29:02.799 Gabor Szabo: And so this is the HTML file that I opened.
190 00:29:03.330 --> 00:29:17.080 Gabor Szabo: And you can see, the source code, and you can see that the display file has a very… a rather good test coverage, 85%. It can be improved, but
191 00:29:17.080 --> 00:29:24.870 Gabor Szabo: It is, as it is, and now you can see which functions were not covered by tests.
192 00:29:26.140 --> 00:29:28.440 Gabor Szabo: Okay? So…
193 00:29:29.530 --> 00:29:37.000 Gabor Szabo: So now, we could go and write a test, or read a little bit more of the source code, and write a test. If I go back here.
194 00:29:37.510 --> 00:29:45.050 Gabor Szabo: back this one, and so there is… the other… other files are way less covered. The yellow… the yellow ones…
195 00:29:45.590 --> 00:29:46.750 Gabor Szabo: I guess…
196 00:29:47.070 --> 00:29:58.489 Gabor Szabo: different ranges, and then there is the select RS, which is really poorly tested, okay? Now, I… I don't know that well this crate, I…
197 00:29:58.560 --> 00:30:03.530 Gabor Szabo: Basically found it in a random, more or less random way,
198 00:30:03.530 --> 00:30:12.659 Gabor Szabo: a couple of months ago, when I dealt with it. But that's one thing that you can… you can do, and you should do.
199 00:30:12.660 --> 00:30:24.670 Gabor Szabo: And I think that's it for now. Let's stop… let me stop here. Maybe I even stop the recording, for now, and then you,
200 00:30:26.370 --> 00:30:45.600 Gabor Szabo: you need to do all these things, okay? So you can also do this, and I will be able to help you. And I'm not recording it so no one needs to worry about the recording. So you don't need to use the Docker container, you can use it locally. Before…
201 00:30:46.340 --> 00:31:03.419 Gabor Szabo: I let you start doing it one more thing. So, either you already have some crate that you want to deal with, okay? You can go with some crate that you want to play with, but the… probably most of you will pick some big crate.
202 00:31:03.520 --> 00:31:18.780 Gabor Szabo: well-known crate. I have another proposition. Go with a semi… here is what the… at the top of the OSDC page. I said, a semi-popular, recently updated Rust project. So if you click on this link.
203 00:31:19.140 --> 00:31:27.670 Gabor Szabo: Well, I have to fix the link because it's an old link. It says it's a… it goes to GitHub, and it searches for
204 00:31:28.030 --> 00:31:39.440 Gabor Szabo: projects where the language is Rust, as you can see. It has between a hundred and a thousand stars. This is an arbitrary
205 00:31:40.380 --> 00:31:47.940 Gabor Szabo: range for saying semi-popular, okay? So it's not very popular, but it's not also not some beginner thing.
206 00:31:47.940 --> 00:31:59.760 Gabor Szabo: And it was changed recently. Now, I updated that file, apparently, in October last year, so it's almost a year ago, so you can come here and change the date and say, okay, let's say
207 00:31:59.760 --> 00:32:08.729 Gabor Szabo: 08, so it's a lot… it was changed in the last months, and let's say you say you want to between 10 and 100 stars.
208 00:32:08.730 --> 00:32:19.450 Gabor Szabo: Okay? So you go here, and then you find a bunch of crates which are not totally… so on one hand, not totally,
209 00:32:23.580 --> 00:32:35.240 Gabor Szabo: uninteresting, or un… or new, or whatever can I say on… so it has some stars, okay? It doesn't have a lot of stars, and the point of recently changed
210 00:32:35.380 --> 00:32:39.270 Gabor Szabo: recently pushed here, is that if there is a
211 00:32:39.470 --> 00:32:48.279 Gabor Szabo: project that hasn't been changed for, I don't know, half a year, that… very unlikely that any changes you make will
212 00:32:48.280 --> 00:32:51.509 Gabor Szabo: Will be accepted and integrated.
213 00:32:51.510 --> 00:33:16.380 Gabor Szabo: So if you are… if you care about the fact also that your work will be accepted, then probably it's a good idea, and you're not… you don't have a specific module that creates that you want to contribute to, then probably it's a good idea to pick one that has been changed recently, because then it… the likelihood that it will… that someone will look at your changes
214 00:33:18.530 --> 00:33:28.459 Gabor Szabo: is higher. So, I can share this link as well, and we can try this one. Okay? So, I'm,
215 00:33:28.980 --> 00:33:34.729 Gabor Szabo: Stopping the share now, and then posing the video, and then giving you…
216 00:33:34.980 --> 00:33:46.419 Gabor Szabo: I don't know, 5 minutes, 10 minutes, maybe, I'll give you to do this, okay? So what your task is, is to find the crate.
217 00:33:46.940 --> 00:33:50.400 Gabor Szabo: Whether you find it a random one, or one that you already
218 00:33:50.570 --> 00:34:01.559 Gabor Szabo: came with, because you want to contribute to, clone it, okay, to your machine, and run the, run the tests, and run the,
219 00:34:01.840 --> 00:34:07.370 Gabor Szabo: test coverage report, and then show it to us, okay? So we can see it.
220 00:34:07.720 --> 00:34:13.979 Gabor Szabo: Emm… So, let me find the button to stop, pause the recording.
221 00:34:14.909 --> 00:34:16.709 Gabor Szabo: Pause recording, okay.
222 00:34:19.100 --> 00:34:33.349 Gabor Szabo: Okay, so now we continue. Hopefully, those who are watching the video might have stopped it and did some of the work already. And I would like to just run on the same codebase, the…
223 00:34:33.510 --> 00:34:46.270 Gabor Szabo: the other tool, the mutation testing that I mentioned. So this is the cargo install mutant, and that's it. I… I don't remember how to run these things, even though they are so simple.
224 00:34:48.199 --> 00:34:50.740 Gabor Szabo: Okay, that's not good.
225 00:34:52.010 --> 00:34:56.419 Gabor Szabo: I thought it was installed in the container… in the image.
226 00:34:56.699 --> 00:35:00.560 Gabor Szabo: But apparently not, so now I'm installing it.
227 00:35:07.160 --> 00:35:10.430 Gabor Szabo: And then, let's use the opportunity.
228 00:35:12.350 --> 00:35:15.700 Gabor Szabo: to go to… GitHub?
229 00:35:17.800 --> 00:35:19.070 Gabor Szabo: Sub-gub?
230 00:35:20.720 --> 00:35:22.590 Gabor Szabo: And, Rust…
231 00:35:27.450 --> 00:35:30.089 Gabor Szabo: Docker on Ubuntu, okay.
232 00:35:31.780 --> 00:35:36.300 Gabor Szabo: Dockerfile, okay, I'm going to enlarge the font, probably, it's a good idea.
233 00:35:36.550 --> 00:35:38.100 Gabor Szabo: Dockerfile…
234 00:35:43.550 --> 00:35:44.510 Gabor Szabo: Utah?
235 00:35:47.810 --> 00:35:49.400 Gabor Szabo: Interesting, you see?
236 00:35:50.020 --> 00:35:51.309 Gabor Szabo: It's not there.
237 00:35:53.350 --> 00:36:04.439 Gabor Szabo: Okay, so this is the file, okay, just to explain you, nothing to do really with the project. This is the file, the Docker file, that generates that Docker image.
238 00:36:09.370 --> 00:36:13.650 Gabor Szabo: And so I'm going to add… this one.
239 00:36:22.670 --> 00:36:24.370 Gabor Szabo: That's it, right? Yeah.
240 00:36:27.450 --> 00:36:37.000 Gabor Szabo: Strange, I thought that I already added it. Okay, so git add docker file, git… edit… mute.
241 00:36:40.320 --> 00:36:42.350 Gabor Szabo: Mutant… okay.
242 00:36:43.770 --> 00:36:47.009 Gabor Szabo: So… that's it, basically. Oh, no.
243 00:36:52.000 --> 00:36:54.460 Gabor Szabo: It probably…
244 00:36:58.100 --> 00:36:59.739 Gabor Szabo: I updated something there.
245 00:37:00.800 --> 00:37:18.530 Gabor Szabo: I can even take a look at it. It was the dependable that updated something in the GitHub Actions, okay? That's why I had to pull it. Anyway, I updated the Docker configuration, so the next time it builds the image, which is now, and I will already have the
246 00:37:18.590 --> 00:37:29.880 Gabor Szabo: this tool also inside, so the mutants, which apparently I didn't have. Okay, so now I'm supposed to be able to run this command as well inside the container.
247 00:37:30.610 --> 00:37:36.020 Gabor Szabo: And because it's a very much smaller crate.
248 00:37:36.020 --> 00:37:51.670 Gabor Szabo: It still found 350 mutants, but the tests are running, I think, much faster. But I still… there are a couple of missed things, so let me try to remember how it helped, how it was. So this is the…
249 00:37:54.020 --> 00:38:01.070 Gabor Szabo: This was when… before I ran the… I contributed, I think. Then I com… after I…
250 00:38:01.490 --> 00:38:07.420 Gabor Szabo: So I found this crate, and then I run these tools, and I found that there are, like.
251 00:38:07.710 --> 00:38:14.159 Gabor Szabo: 600… 165… Mutants that were, failing.
252 00:38:14.330 --> 00:38:23.280 Gabor Szabo: or missed, and that was exactly the story that I told you, that there were these, this,
253 00:38:23.600 --> 00:38:35.659 Gabor Szabo: This is the change, so it had these print statements inside. Doing some calculation, or doing some work, generating this doc, whatever it is, doesn't matter, it's a string.
254 00:38:35.800 --> 00:38:40.960 Gabor Szabo: And then just printing it out. That was the code, that was the test.
255 00:38:41.090 --> 00:38:52.549 Gabor Szabo: And so I… I looked at what it prints out, I said, okay, hopefully, whatever it prints out is the right thing. I mean, I said, I mean, I don't really know, I don't…
256 00:38:52.780 --> 00:39:06.159 Gabor Szabo: really know what it's supposed to be, but let's… let's assume that whatever it is does now works, is the correct one. So, I think I even commented in the… in the comment that I hadn't
257 00:39:06.160 --> 00:39:15.670 Gabor Szabo: verified that whatever we are now testing is correct, I just… testing whatever it… so the regression part of it.
258 00:39:15.840 --> 00:39:22.499 Gabor Szabo: So, I replace the print statement with an assert statement, saying, okay, this is what we are expecting
259 00:39:22.780 --> 00:39:37.749 Gabor Szabo: this dock to be. And that's it. And then I ran the cargo mutants, and it went down from 165 missed to 141 missed, out of the 337 mutants. Now.
260 00:39:37.790 --> 00:39:44.169 Gabor Szabo: I don't know what happened since then. There, I mean, since I made that pull request.
261 00:39:45.370 --> 00:39:51.179 Gabor Szabo: Yeah, I made that pull request somewhere, probably there is a link here to the pull request.
262 00:39:53.030 --> 00:39:56.629 Gabor Szabo: Since now that I run it, it found…
263 00:39:56.880 --> 00:40:12.649 Gabor Szabo: It scripts… 350, mutants. It's saying at the bottom, last row, I don't know if you can see it, I hope that you can see it. It says it's now running the… which mutant it's testing, but it's,
264 00:40:13.400 --> 00:40:17.550 Gabor Szabo: And so far, this is the result. Okay?
265 00:40:25.440 --> 00:40:27.040 Gabor Szabo: So, I mean…
266 00:40:27.150 --> 00:40:40.310 Gabor Szabo: This is not very surprising, okay? I probably… there is no… not a lot of point, not really good reason to run the mutation test on this grade, because we already know that there are so many
267 00:40:40.630 --> 00:40:42.580 Gabor Szabo: There's…
268 00:40:42.660 --> 00:40:52.099 Gabor Szabo: such a huge percentage of the codebase is not tested. That's what the tarpaulin, the tarpaulin, the test coverage report, revealed.
269 00:40:52.110 --> 00:41:01.990 Gabor Szabo: So, obviously, if you make any changes in a code, part of the code that is not tested, the test, it won't impact the tests, okay? The test won't fail. So…
270 00:41:01.990 --> 00:41:13.810 Gabor Szabo: Most of these things that we can see here are probably parts of the code that were never tested. So the first thing that we should do now is write some tests for those parts.
271 00:41:13.960 --> 00:41:23.009 Gabor Szabo: Okay, so I think I'm going to even stop this, because, it's just running and doing…
272 00:41:23.490 --> 00:41:26.109 Gabor Szabo: If you'll give us a report, okay, whatever.
273 00:41:26.300 --> 00:41:33.190 Gabor Szabo: Instead of that, let me try to do some… let me try to do something else. I run…
274 00:41:33.720 --> 00:41:36.539 Gabor Szabo: AGY, which is the…
275 00:41:40.240 --> 00:41:48.040 Gabor Szabo: which is… what is it called? The anti-gravity, okay, so the Gemini tool.
276 00:41:54.040 --> 00:41:57.790 Gabor Szabo: Okay, so there is a question. Some tests in this codebase
277 00:41:57.940 --> 00:42:06.759 Gabor Szabo: are running for too long. Is there a way to ignore specific tests instead of just removing them?
278 00:42:07.190 --> 00:42:25.900 Gabor Szabo: I think… I mean, yeah, running the normal test running, definitely, you have… you can filter out tests. I'm not sure if you're using tarpaulin or this tool, how to do this, but cargo mutants.
279 00:42:26.120 --> 00:42:27.130 Gabor Szabo: Help?
280 00:42:27.630 --> 00:42:28.640 Gabor Szabo: Bless?
281 00:42:28.950 --> 00:42:33.710 Gabor Szabo: Exclude… here it is.
282 00:42:38.600 --> 00:42:39.690 Gabor Szabo: Okay.
283 00:42:41.730 --> 00:42:47.109 Gabor Szabo: I'm not sure if what the… what is it excluding, whether it's excluding the files.
284 00:42:49.240 --> 00:42:58.350 Gabor Szabo: which ones to change, or excluding, tests from… I know, probably the… the…
285 00:43:00.130 --> 00:43:03.479 Gabor Szabo: Wait a second. Time out. Time out.
286 00:43:03.620 --> 00:43:13.720 Gabor Szabo: That I remember. So you can set, what are… what should be the timeout. Minimum test timeout, okay?
287 00:43:16.180 --> 00:43:26.200 Gabor Szabo: or you can set a timeout, whatever, maximum runtime for all cargo commands. Okay, not minimum test time, I don't know. Timeout multiplier…
288 00:43:27.050 --> 00:43:30.809 Gabor Szabo: I don't know, okay? Let's see, cargo test.
289 00:43:45.310 --> 00:43:55.649 Gabor Szabo: So, here's exclude packages, and which test to run. So, with the test, you can configure which ones… you can tell it which one to run and which not.
290 00:43:58.190 --> 00:44:13.890 Gabor Szabo: Yeah, I don't know… I don't know how to tell the other tools which test to run when you're running. And I'm not even sure that that's a good idea. I mean, if test coverage… if you care about test coverage, we want to know what is the general test coverage.
291 00:44:13.890 --> 00:44:22.199 Gabor Szabo: I mean, depending on what you're testing. For example, I have a codebase where I have various subsystems.
292 00:44:22.410 --> 00:44:24.209 Gabor Szabo: And I have passed.
293 00:44:24.360 --> 00:44:31.239 Gabor Szabo: Specifically for those subsystems. And then there are generic, more integration tests, let's say.
294 00:44:31.300 --> 00:44:35.230 Gabor Szabo: And so, sometimes I want to run test coverage report.
295 00:44:35.230 --> 00:44:59.739 Gabor Szabo: running only the tests of the specific subsystem to see how well they are actually covering that subsystem, without the integration tests that are also covering those subsystems, and might cover some parts of it that are the more, like, unit tests are not covering. And let's say I want to make sure that the unit tests are covering. So, in that case, I run
296 00:44:59.740 --> 00:45:05.100 Gabor Szabo: A test coverage report on the test of the subsystem, or whatever.
297 00:45:05.320 --> 00:45:08.210 Gabor Szabo: Crate, or… so part of the code.
298 00:45:09.470 --> 00:45:20.860 Gabor Szabo: So I wanted to do this, I think, run anti-gravity, which is Gemini, and I have a subscription, so hopefully it will, do some…
299 00:45:23.100 --> 00:45:30.640 Gabor Szabo: okay, whatever, it's warning about me, good, whatever, good. So, I would like to,
300 00:45:31.240 --> 00:45:34.929 Gabor Szabo: I don't know exactly the…
301 00:45:36.120 --> 00:45:48.090 Gabor Szabo: we can go back to the report, okay? So, we can go back to this report, and find…
302 00:45:48.200 --> 00:45:49.790 Gabor Szabo: something here.
303 00:45:53.400 --> 00:45:56.120 Gabor Szabo: Here, there is a function here, indent.
304 00:45:56.270 --> 00:45:57.310 Gabor Szabo: Okay?
305 00:45:57.550 --> 00:46:03.450 Gabor Szabo: So, right… one test, Death.
306 00:46:03.580 --> 00:46:07.180 Gabor Szabo: Real… Cool…
307 00:46:13.970 --> 00:46:16.420 Gabor Szabo: It's called SRC Displays.
308 00:46:16.540 --> 00:46:17.430 Gabor Szabo: Right?
309 00:46:18.380 --> 00:46:21.420 Gabor Szabo: The… indent.
310 00:46:23.730 --> 00:46:32.990 Gabor Szabo: Hmmelt… the… what is it? Config indent? Let's say this one, config indent.
311 00:46:34.100 --> 00:46:42.250 Gabor Szabo: function in the SRC… display… File.
312 00:46:43.340 --> 00:46:44.340 Gabor Szabo: Okay?
313 00:46:44.480 --> 00:46:45.870 Gabor Szabo: I, I…
314 00:46:46.110 --> 00:47:00.439 Gabor Szabo: just trying to, minimize it, okay? So I told it what to do. Let me see. We are seeing the test works fine with cargo test, but with cargo turbo, it takes forever. Well,
315 00:47:00.730 --> 00:47:06.890 Gabor Szabo: So, the forever is way too long, obviously, but, it's,
316 00:47:07.120 --> 00:47:19.629 Gabor Szabo: It's definitely a lot slower, because now, while the test is running, it's also recording things, so it added various things to the code base, to the compiled code.
317 00:47:20.440 --> 00:47:25.289 Gabor Szabo: So you have a lot more code, inside your… your…
318 00:47:26.080 --> 00:47:44.390 Gabor Szabo: code, right? Your application, and it's writing somewhere, so it will definitely take longer. Now, forever, it's a bit too much, okay? So, but I did see, like, a 10 times increase in time, and that seems like,
319 00:47:44.750 --> 00:47:50.230 Gabor Szabo: I don't know, normal, shall I call it, but existing, at least. So…
320 00:47:54.010 --> 00:48:08.839 Gabor Szabo: Yeah. Now, on the other hand, yeah, you can… you could take a look, I don't know if what operating system you're running. It still hasn't finished, so I feel it's stopped. Yeah, maybe it stopped. Yeah, that can also happen. But you could also take a look at the…
321 00:48:09.370 --> 00:48:22.489 Gabor Szabo: So probably you can also set some logging on it, so you will see if it is progressing, and… and you could probably take a look at… because you're using Zoom, it might also take up some of your,
322 00:48:24.520 --> 00:48:32.550 Gabor Szabo: CPU power, I had no idea what… you can take a look at that one, depending on your operating system, and the… how…
323 00:48:32.680 --> 00:48:37.510 Gabor Szabo: bigger computer it is. So here it is, okay?
324 00:48:37.950 --> 00:48:44.139 Gabor Szabo: So, there is a… Test for it.
325 00:48:44.660 --> 00:48:53.600 Gabor Szabo: Okay? And now we can go to the… To the outside, git status.
326 00:48:55.060 --> 00:49:07.530 Gabor Szabo: And this is what changed. So these are… this is the tarpaulin report, okay? Probably I should set a gitignore, so it won't be added by meme.
327 00:49:07.530 --> 00:49:16.869 Gabor Szabo: by mistake, but it's not really my project, so… And so this is what the… the agent now changed, bit, diff, S-R-C,
328 00:49:17.080 --> 00:49:18.010 Gabor Szabo: Leap.
329 00:49:19.240 --> 00:49:24.439 Gabor Szabo: And, I don't know. Use create display config?
330 00:49:26.430 --> 00:49:27.490 Gabor Szabo: Okay.
331 00:49:28.380 --> 00:49:37.330 Gabor Szabo: document from, it takes the document, doc, okay? Config default pretty, indent, okay, this is what it does.
332 00:49:37.560 --> 00:49:43.630 Gabor Szabo: So it… it creates some configuration, and then it runs two string prettes config.
333 00:49:43.780 --> 00:49:47.220 Gabor Szabo: Okay, and now it needs to look at, like, this.
334 00:49:48.380 --> 00:49:55.789 Gabor Szabo: Okay, let's, hope that it works, okay? So…
335 00:49:55.970 --> 00:50:00.050 Gabor Szabo: I go back, and now probably,
336 00:50:03.260 --> 00:50:16.079 Gabor Szabo: probably I need to… I should have two Docker sessions open, or I can run here, with an exclamation mark, I think. I can run cargo…
337 00:50:16.550 --> 00:50:21.019 Gabor Szabo: cargo… How did I write a telephone pole in here?
338 00:50:25.970 --> 00:50:27.959 Gabor Szabo: Test coverage, this one.
339 00:50:28.750 --> 00:50:30.740 Gabor Szabo: Cargo tarpaulin?
340 00:50:34.620 --> 00:50:36.959 Gabor Szabo: And then I also need this one.
341 00:50:40.670 --> 00:50:54.260 Gabor Szabo: And before I do that, let me… move the tarpauline… A report, tarpaulin report… 1.
342 00:50:54.510 --> 00:50:57.850 Gabor Szabo: Okay? And now I run this code again.
343 00:50:58.350 --> 00:51:05.509 Gabor Szabo: And so I'm inside the agent, but I'm executing an external code, hopefully.
344 00:51:05.630 --> 00:51:12.659 Gabor Szabo: So it's not the agent doing anything, it's just letting the… I don't need to leave the…
345 00:51:12.940 --> 00:51:18.309 Gabor Szabo: the agent to run this, and I think it finished.
346 00:51:19.010 --> 00:51:25.429 Gabor Szabo: Let me see its status. Okay, so it created a new report.
347 00:51:25.620 --> 00:51:34.890 Gabor Szabo: And I can go back to this page, and now I'm going to reload it, and hopefully this part is going to be green.
348 00:51:36.110 --> 00:51:42.160 Gabor Szabo: this part, okay? Good. So I… now I have a… new test.
349 00:51:43.170 --> 00:51:49.549 Gabor Szabo: And I can get… check out, minus B.
350 00:51:50.410 --> 00:51:51.360 Gabor Szabo: Ed.
351 00:51:51.490 --> 00:51:52.430 Gabor Szabo: Dest?
352 00:51:52.880 --> 00:51:55.589 Gabor Szabo: Give that SRC.
353 00:51:55.930 --> 00:51:56.960 Gabor Szabo: bleep?
354 00:51:59.420 --> 00:52:05.480 Gabor Szabo: Git status, git… And… nest?
355 00:52:22.160 --> 00:52:23.030 Gabor Szabo: Beautiful.
356 00:52:23.360 --> 00:52:24.160 Gabor Szabo: Oof.
357 00:52:24.380 --> 00:52:27.510 Gabor Szabo: Minus… you…
358 00:52:33.840 --> 00:52:34.690 Gabor Szabo: 4.
359 00:52:39.070 --> 00:52:40.480 Gabor Szabo: It's this?
360 00:52:41.300 --> 00:52:52.549 Gabor Szabo: Okay? So this one, you remember Git Remote minus 3. I have, in this project, I have two remotes. I cloned it originally from
361 00:52:52.730 --> 00:53:02.119 Gabor Szabo: So I don't work the same way as many other people do. I don't… when I encounter an open source project, I don't fork and clone.
362 00:53:02.440 --> 00:53:07.549 Gabor Szabo: from my own fork. Instead, I clone from the original one.
363 00:53:08.590 --> 00:53:20.160 Gabor Szabo: that I'm going to contribute to, and then I play with it, and then if I really know how to contribute, then I create a fork, and I create a remote which is called fork.
364 00:53:20.170 --> 00:53:34.910 Gabor Szabo: This makes more sense to me, okay? Instead of the other way around that many people recommend. And so now, I created a branch, and pushed out that branch to my fork.
365 00:53:35.160 --> 00:53:43.289 Gabor Szabo: And I can go to… It's SubGov XML, okay?
366 00:53:43.590 --> 00:53:48.619 Gabor Szabo: GitHub subgroup XMLEM, okay?
367 00:53:48.790 --> 00:53:57.470 Gabor Szabo: So this is the fork, and it's here, and I think the actions are Running.
368 00:53:58.000 --> 00:54:04.310 Gabor Szabo: Yeah, and the test passed, okay, so this was one minute ago, so this is the GitHub action.
369 00:54:04.510 --> 00:54:07.059 Gabor Szabo: And I can go back to this one.
370 00:54:07.240 --> 00:54:11.919 Gabor Szabo: And, send a pull request.
371 00:54:12.630 --> 00:54:14.080 Gabor Szabo: Create a pull request.
372 00:54:18.000 --> 00:54:19.049 Gabor Szabo: And that's it!
373 00:54:20.320 --> 00:54:30.130 Gabor Szabo: Okay? Now, I'm going to… I think that's it. If you have any questions, any more comments, then…
374 00:54:30.260 --> 00:54:43.430 Gabor Szabo: do it, then ask it now. If not, I can stop the recording, so people who are watching the video can click on the like button and follow the channel, okay, remember that one.
375 00:54:44.200 --> 00:54:51.200 Gabor Szabo: And, and you can stay around and do a little bit more work, if you…
376 00:54:51.810 --> 00:54:56.019 Gabor Szabo: would like to, those people who are around, and I can still help you.
377 00:54:56.460 --> 00:55:04.400 Gabor Szabo: So, it seems… can you share the YouTube channel? Yes, yes, I don't… It's,
378 00:55:07.770 --> 00:55:10.220 Gabor Szabo: How do I share it?
379 00:55:10.360 --> 00:55:11.370 Gabor Szabo: Properly.
380 00:55:11.810 --> 00:55:18.310 Gabor Szabo: Find new window… Without sharing all the… everything.
381 00:55:18.560 --> 00:55:26.050 Gabor Szabo: YouTube at Google. Actually, I think if I just visit that URL, then it will only show those
382 00:55:26.290 --> 00:55:33.889 Gabor Szabo: Not all of my… This is the YouTube channel. Okay, I put it in the chat.
383 00:55:34.750 --> 00:55:35.860 Gabor Szabo: Boom.
384 00:55:37.690 --> 00:55:49.630 Gabor Szabo: Surprisingly, it's called Code Mailer. Anyway, so thank you for, for being here, and asking questions and discussing things.
385 00:55:49.630 --> 00:56:04.759 Gabor Szabo: And thank you for everyone who's watching the video, for watching it, and follow the channel. And below the video, you will find links to… I guess, to the video, and to the… to notes, and to all the things that I shared in the chat.
386 00:56:06.410 --> 00:56:19.070 Gabor Szabo: And, sign up for upcoming events, both Rust and other languages that I also mentioned. And that's it for now. Thank you very much. Bye-bye.
