Robin Malfait
32 lines
770 B
TypeScript
32 lines
770 B
TypeScript
// Assuming requestAnimationFrame is roughly 60 frames per second
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const frame = 1000 / 60
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const formatter = new Intl.NumberFormat('en')
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expect.extend({
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toBeWithinRenderFrame(actual, expected) {
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const min = expected - frame
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const max = expected + frame
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const pass = actual >= min && actual <= max
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if (pass) {
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return {
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message: () =>
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`expected ${actual} not to be within range of a frame ${formatter.format(
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min
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)} - ${formatter.format(max)}`,
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pass: true,
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}
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} else {
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return {
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message: () =>
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`expected ${actual} to be within range of a frame ${formatter.format(
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min
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)} - ${formatter.format(max)}`,
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pass: false,
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}
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}
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},
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})
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