| 1 | 'use strict'; |
| 2 | |
| 3 | const JestReact = require('jest-react'); |
| 4 | const {assertConsoleLogsCleared} = require('internal-test-utils/consoleMock'); |
| 5 | // TODO: Move to ReactInternalTestUtils |
| 6 | |
| 7 | function captureAssertion(fn) { |
| 8 | // Trick to use a Jest matcher inside another Jest matcher. `fn` contains an |
| 9 | // assertion; if it throws, we capture the error and return it, so the stack |
| 10 | // trace presented to the user points to the original assertion in the |
| 11 | // test file. |
| 12 | try { |
| 13 | fn(); |
| 14 | } catch (error) { |
| 15 | return { |
| 16 | pass: false, |
| 17 | message: () => error.message, |
| 18 | }; |
| 19 | } |
| 20 | return {pass: true}; |
| 21 | } |
| 22 | |
| 23 | function assertYieldsWereCleared(Scheduler, caller) { |
| 24 | const actualYields = Scheduler.unstable_clearLog(); |
| 25 | if (actualYields.length !== 0) { |
| 26 | const error = Error( |
| 27 | 'The event log is not empty. Call assertLog(...) first.' |
| 28 | ); |
| 29 | Error.captureStackTrace(error, caller); |
| 30 | throw error; |
| 31 | } |
| 32 | assertConsoleLogsCleared(); |
| 33 | } |
| 34 | |
| 35 | function toMatchRenderedOutput(ReactNoop, expectedJSX) { |
| 36 | if (typeof ReactNoop.getChildrenAsJSX === 'function') { |
| 37 | const Scheduler = ReactNoop._Scheduler; |
| 38 | assertYieldsWereCleared(Scheduler, toMatchRenderedOutput); |
| 39 | return captureAssertion(() => { |
| 40 | expect(ReactNoop.getChildrenAsJSX()).toEqual(expectedJSX); |
| 41 | }); |
| 42 | } |
| 43 | return JestReact.unstable_toMatchRenderedOutput(ReactNoop, expectedJSX); |
| 44 | } |
| 45 | |
| 46 | module.exports = { |
| 47 | toMatchRenderedOutput, |
| 48 | }; |