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9075c82b88
[server-ce] make tests more robust GitOrigin-RevId: f070b8bbbf87842a69d88ca56cecf5dd0f3a286c
39 lines
1.3 KiB
TypeScript
39 lines
1.3 KiB
TypeScript
export function waitUntilScrollingFinished(selector: string, start = -1) {
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const pollSlow = 100
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const pollFast = 10
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const deadline =
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performance.now() + Cypress.config('defaultCommandTimeout') - pollSlow * 2
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return cy.get(selector).then(el => {
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cy.log(
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`waiting until scrolling finished for ${selector}, starting from ${start}`
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)
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return new Cypress.Promise<number>((resolve, reject) => {
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const waitForStable = (prev: number, stableFor: number) => {
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if (performance.now() > deadline) {
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return reject(new Error('timeout waiting for scrolling to finish'))
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}
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const current = el.scrollTop()!
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if (current !== prev) {
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setTimeout(() => waitForStable(current, 0), pollFast)
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} else if (stableFor < 5) {
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setTimeout(() => waitForStable(current, stableFor + 1), pollFast)
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} else {
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resolve(current)
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}
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}
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const waitForChange = () => {
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if (performance.now() > deadline) {
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return reject(new Error('timeout waiting for scrolling to start'))
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}
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const current = el.scrollTop()!
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if (current === start) {
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setTimeout(() => waitForChange(), pollSlow)
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} else {
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setTimeout(() => waitForStable(current, 0), pollFast)
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}
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}
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waitForChange()
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})
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})
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}
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