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fix: Guard against jest.useRealTimers not existing #934

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Merged
merged 2 commits into from
Apr 22, 2021
Merged

fix: Guard against jest.useRealTimers not existing #934

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87d2195
fix: check if `jest.useRealTimers` exists
ph-fritsche Apr 22, 2021
80a6af8
Update src/helpers.js
ph-fritsche Apr 22, 2021
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28 changes: 15 additions & 13 deletions src/helpers.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,13 +5,18 @@ const TEXT_NODE = 3

// Currently this fn only supports jest timers, but it could support other test runners in the future.
function runWithRealTimers(callback) {
// istanbul ignore else
if (typeof jest !== 'undefined') {
return runWithJestRealTimers(callback).callbackReturnValue
}
return hasJestTimers()
? runWithJestRealTimers(callback).callbackReturnValue
: // istanbul ignore next
callback()
}

// istanbul ignore next
return callback()
function hasJestTimers() {
return (
typeof jest !== 'undefined' &&
jest !== null &&
typeof jest.useRealTimers === 'function'
)
}

function runWithJestRealTimers(callback) {
Expand Down Expand Up @@ -50,13 +55,10 @@ function runWithJestRealTimers(callback) {
}

function jestFakeTimersAreEnabled() {
// istanbul ignore else
if (typeof jest !== 'undefined') {
return runWithJestRealTimers(() => {}).usedFakeTimers
}

// istanbul ignore next
return false
return hasJestTimers()
? runWithJestRealTimers(() => {}).usedFakeTimers
: // istanbul ignore next
false
}

// we only run our tests in node, and setImmediate is supported in node.
Expand Down