Getting started with pytest Transcripts
Chapter: Markers
Lecture: Skipping tests conditionally with pytest.mark.skipif
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Now let's say I've decided that this sorting and the less than I'm not going to support it now, but I'm gonna sort it support it in version two.
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So right now the cards version is 1.0.1. And I'm gonna I think that the next major version will support this sorting for.
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I don't know, I'll come up with a reason why we need to go ahead and copy this into a test skip if but I want to show you what we're
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going to use to compare the version. See the version string is just a string. It's like 1.0.1. Let's take a look at it.
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It's in the init and it's just this string. So I want to compare the version to say that this major version is less if
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it's two or if it's less than two, then I want to skip these tests. That's the comparison I want to do to get at that.
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I'm going to use something from packaging. So it's the parse function from packaging.version. And packaging is a third party installed.
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You have to do. So you're gonna have to do pip install packaging to use this. But I want to show this to I've already got it installed.
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I want to show it because it's really pretty cool and I've used it in a couple of projects. How it works is it's probably got a bunch of stuff
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in there. But what I use it for is to pull out the major minor and micro versions so that I can see those and I have this test put together
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I've got a print so that we can see it. And I'm just asserting that if I put it all back together the major minor micro
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with dots it will equal the version that we had before. So let's go ahead and run that just to see how the packaging version parse works
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So pytest -S test, skip if. Major is one minor. Zero micro is one and I'm pretty sure that test passed the packaging.
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Yes it passed. Let's just leave that in place while we're playing with the rest Now now that I have that ability to parse that out I can say give
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this a condition. So instead of skip I'll say skip if and then the first thing that skip if wants is a condition and I'm going to give it this
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say that this parse command. If this is the object that gets passed back I'm
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just gonna look at the major and if that's less than two then we'll go over Go ahead and say sort not supported on version one x.
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And then we can do the let's go ahead and just copy that. It's gonna be a little so less than not supported.
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So now we have skip ifs instead of skips and we were skips before let's run
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it again. And less than and support not supported on version 1.x wonderful so that's how skipif works.