microsoft/TypeScript
1
0
Fork 0
mirror of https://github.com/microsoft/TypeScript.git synced 2026-02-05 07:45:18 -06:00
Code Issues Packages Projects Releases 212 Wiki Activity

Test for asyncIterator existance before defining

Browse Source
This commit is contained in:
Ron Buckton 2018-05-29 17:12:50 -07:00
parent c224a824f3
commit 394862e829
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/harness/unittests/forAwaitOfEvaluation.ts
View File

@ -18,13 +18,17 @@ namespace ts {
throw new Error(`Module '${id}' could not be found.`);
}
// Define a custom "Symbol" constructor to attach missing built-in symbols without
// modifying the global "Symbol" constructor
// tslint:disable-next-line:variable-name
const FakeSymbol: SymbolConstructor = ((description?: string) => Symbol(description)) as any;
(<any>FakeSymbol).prototype = Symbol.prototype;
for (const key of Object.getOwnPropertyNames(Symbol)) {
Object.defineProperty(FakeSymbol, key, Object.getOwnPropertyDescriptor(Symbol, key)!);
}
(<any>FakeSymbol).asyncIterator = (<any>FakeSymbol).asyncIterator || Symbol.for("Symbol.asyncIterator");
// Add "asyncIterator" if missing
if (!hasProperty(FakeSymbol, "asyncIterator")) Object.defineProperty(FakeSymbol, "asyncIterator", { value: Symbol.for("Symbol.asyncIterator"), configurable: true });
function evaluate(result: compiler.CompilationResult) {
const output = result.getOutput(sourceFile, "js")!;