react/packages/react-dom/npm/testing.js
Sunil Pai 3e9251d605
make testing builds for React/ReactDOM (#17915)
This PR introduces adds `react/testing` and `react-dom/testing`.
- changes infra to generate these builds
- exports act on ReactDOM in these testing builds
- uses the new test builds in fixtures/dom

In the next PR -

- I'll use the new builds for all our own tests
- I'll replace usages of TestUtils.act with ReactDOM.act.
2020-02-03 23:31:31 +00:00

39 lines
1.3 KiB
JavaScript

'use strict';
function checkDCE() {
/* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
if (
typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined' ||
typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE !== 'function'
) {
return;
}
if (process.env.NODE_ENV !== 'production') {
// This branch is unreachable because this function is only called
// in production, but the condition is true only in development.
// Therefore if the branch is still here, dead code elimination wasn't
// properly applied.
// Don't change the message. React DevTools relies on it. Also make sure
// this message doesn't occur elsewhere in this function, or it will cause
// a false positive.
throw new Error('^_^');
}
try {
// Verify that the code above has been dead code eliminated (DCE'd).
__REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE(checkDCE);
} catch (err) {
// DevTools shouldn't crash React, no matter what.
// We should still report in case we break this code.
console.error(err);
}
}
if (process.env.NODE_ENV === 'production') {
// DCE check should happen before ReactDOM bundle executes so that
// DevTools can report bad minification during injection.
checkDCE();
module.exports = require('./cjs/react-dom-testing.production.min.js');
} else {
module.exports = require('./cjs/react-dom-testing.development.js');
}