test-utils.js (1558B)
1 'use strict'; 2 3 self.delay = ms => new Promise(resolve => step_timeout(resolve, ms)); 4 5 // For tests which verify that the implementation doesn't do something it shouldn't, it's better not to use a 6 // timeout. Instead, assume that any reasonable implementation is going to finish work after 2 times around the event 7 // loop, and use flushAsyncEvents().then(() => assert_array_equals(...)); 8 // Some tests include promise resolutions which may mean the test code takes a couple of event loop visits itself. So go 9 // around an extra 2 times to avoid complicating those tests. 10 self.flushAsyncEvents = () => delay(0).then(() => delay(0)).then(() => delay(0)).then(() => delay(0)); 11 12 self.assert_typed_array_equals = (actual, expected, message) => { 13 const prefix = message === undefined ? '' : `${message} `; 14 assert_equals(typeof actual, 'object', `${prefix}type is object`); 15 assert_equals(actual.constructor, expected.constructor, `${prefix}constructor`); 16 assert_equals(actual.byteOffset, expected.byteOffset, `${prefix}byteOffset`); 17 assert_equals(actual.byteLength, expected.byteLength, `${prefix}byteLength`); 18 assert_equals(actual.buffer.byteLength, expected.buffer.byteLength, `${prefix}buffer.byteLength`); 19 assert_array_equals([...actual], [...expected], `${prefix}contents`); 20 assert_array_equals([...new Uint8Array(actual.buffer)], [...new Uint8Array(expected.buffer)], `${prefix}buffer contents`); 21 }; 22 23 self.makePromiseAndResolveFunc = () => { 24 let resolve; 25 const promise = new Promise(r => { resolve = r; }); 26 return [promise, resolve]; 27 };