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startsWith instead of indexOf #552

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8 changes: 2 additions & 6 deletions src/act-compat.js
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Original file line number Diff line number Diff line change
Expand Up @@ -31,17 +31,13 @@ function asyncAct(cb) {
const firstArgIsString = typeof args[0] === 'string'
if (
firstArgIsString &&
args[0].indexOf(
'Warning: Do not await the result of calling ReactTestUtils.act',
) === 0
args[0].startsWith('Warning: Do not await the result of calling ReactTestUtils.act')
) {
// v16.8.6
isAsyncActSupported = false
} else if (
firstArgIsString &&
args[0].indexOf(
'Warning: The callback passed to ReactTestUtils.act(...) function must not return anything',
) === 0
args[0].startsWith('Warning: The callback passed to ReactTestUtils.act(...) function must not return anything')
) {
// no-op
} else {
Expand Down