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tests(treemap): add test for node coverage shading #12609

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merged 5 commits into from
Jun 3, 2021

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paulirish
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followup from #12603 (comment)

i wrote the code that was wrong, so here's my penance.


driveby change of port number... no reason it needs to conflict w/ 10200 and i'm always happy to avoid stopping my servers.

@paulirish paulirish requested a review from a team as a code owner June 2, 2021 23:37
@paulirish paulirish requested review from adamraine and removed request for a team June 2, 2021 23:37
@google-cla google-cla bot added the cla: yes label Jun 2, 2021
lighthouse-treemap/test/treemap-test-pptr.js Outdated Show resolved Hide resolved
lighthouse-treemap/test/treemap-test-pptr.js Outdated Show resolved Hide resolved
lighthouse-treemap/test/treemap-test-pptr.js Outdated Show resolved Hide resolved
lighthouse-treemap/test/treemap-test-pptr.js Outdated Show resolved Hide resolved

// Determine visual red shading percentage
const percentRed = await gtmElemHandle.evaluate(node => {
const redWidthPx = parseInt(window.getComputedStyle(node, ':before').width);
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would const redWidthPx = node.clientWidth be the same?

oh, no, because pseudoelement. and no way to get a reference to that in JS.

TIL the second parameter of getComputedStyle. 0 : would make sense. 2 does too. but 1?!?

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would const redWidthPx = node.clientWidth be the same?
oh, no, because pseudoelement. and no way to get a reference to that in JS.

yup exactly.

TIL the second parameter of getComputedStyle. 0 : would make sense. 2 does too. but 1?!?

yeah it's weird. spec says 1 or two colons is fine. https://www.w3.org/TR/cssom-1/#dom-window-getcomputedstyle

looks like chrome works with zero, one or two colons. handy.

lighthouse-treemap/test/treemap-test-pptr.js Outdated Show resolved Hide resolved
lighthouse-treemap/test/treemap-test-pptr.js Outdated Show resolved Hide resolved

// Determine visual red shading percentage
const percentRed = await gtmElemHandle.evaluate(node => {
const redWidthPx = parseInt(window.getComputedStyle(node, ':before').width);
Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

would const redWidthPx = node.clientWidth be the same?
oh, no, because pseudoelement. and no way to get a reference to that in JS.

yup exactly.

TIL the second parameter of getComputedStyle. 0 : would make sense. 2 does too. but 1?!?

yeah it's weird. spec says 1 or two colons is fine. https://www.w3.org/TR/cssom-1/#dom-window-getcomputedstyle

looks like chrome works with zero, one or two colons. handy.

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4 participants