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allow an explicit error value again in ErrorBoundary

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This commit is contained in:
Bruno Windels 2023-01-09 13:50:03 +01:00
parent 999a3ca5d2
commit f0d2c19184
1 changed files with 9 additions and 9 deletions
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18
src/utils/ErrorBoundary.ts
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@ -25,22 +25,22 @@ export class ErrorBoundary {
* Executes callback() and then runs errorCallback() on error. * Executes callback() and then runs errorCallback() on error.
* This will never throw but instead return `errorValue` if an error occured. * This will never throw but instead return `errorValue` if an error occured.
*/ */
try<T>(callback: () => T): T | typeof ErrorValue; try<T, E>(callback: () => T, errorValue?: E): T | typeof errorValue;
try<T>(callback: () => Promise<T>): Promise<T | typeof ErrorValue> | typeof ErrorValue { try<T, E>(callback: () => Promise<T>, errorValue?: E): Promise<T | typeof errorValue> | typeof errorValue {
try { try {
let result: T | Promise<T | typeof ErrorValue> = callback(); let result: T | Promise<T | typeof errorValue> = callback();
if (result instanceof Promise) { if (result instanceof Promise) {
result = result.catch(err => { result = result.catch(err => {
this._error = err; this._error = err;
this.errorCallback(err); this.errorCallback(err);
return ErrorValue; return errorValue;
}); });
} }
return result; return result;
} catch (err) { } catch (err) {
this._error = err; this._error = err;
this.errorCallback(err); this.errorCallback(err);
return ErrorValue; return errorValue;
} }
} }
@ -56,9 +56,9 @@ export function tests() {
const boundary = new ErrorBoundary(() => emitted = true); const boundary = new ErrorBoundary(() => emitted = true);
const result = boundary.try(() => { const result = boundary.try(() => {
throw new Error("fail!"); throw new Error("fail!");
}); }, 0);
assert(emitted); assert(emitted);
assert.strictEqual(result, ErrorValue); assert.strictEqual(result, 0);
}, },
"return value of callback is forwarded": assert => { "return value of callback is forwarded": assert => {
let emitted = false; let emitted = false;
@ -74,9 +74,9 @@ export function tests() {
const boundary = new ErrorBoundary(() => emitted = true); const boundary = new ErrorBoundary(() => emitted = true);
const result = await boundary.try(async () => { const result = await boundary.try(async () => {
throw new Error("fail!"); throw new Error("fail!");
}); }, 0);
assert(emitted); assert(emitted);
assert.strictEqual(result, ErrorValue); assert.strictEqual(result, 0);
} }
} }
} }