core(domstats): support an empty html body #9340
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brendankenny
commented
Jul 10, 2019
| @@ -86,8 +86,8 @@ function elementPathInDOM(element) { | |||
| /* istanbul ignore next */ | |||
| function getDOMStats(element, deep = true) { | |||
| let deepestElement = null; | |||
| let maxDepth = 0; | |||
| let maxWidth = 0; | |||
| let maxDepth = -1; | |||
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maxDepth doesn't need to change (<body> counts as depth 1 which is > 0), but it seemed weird not to change it as well :)
It is unfortunate to not have a regression test, but it felt like overkill to add a smoke test (+5 seconds to all future test runs?) for a trivial corner case of a single audit that can only occur with completely empty pages... Where do you fall on that trade off? |
patrickhulce
approved these changes
Jul 10, 2019
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You know I fall into the ship it camp, it just felt like something @brendankenny would say 😉
LGTM!
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fixes #8725
The issue was that domstats starts with a 0 as the max number of children seen as the base case, an empty
<body>has 0 children (which isn't more than 0), and soparentWithMostChildrenstayed asnull.Instead we start with a -1 so that there will always be at least
<body>in there. Could have also gone with a>=check, but that changes it soparentWithMostChildrenis the last one seen if there are ties, which would sort of be a breaking change. This seemed better (and more the original intent, I guess).