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feat: Allow CachedHandler to cache on multiple object fields

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This commit is contained in:
Joachim Van Herwegen
2022-11-17 14:30:47 +01:00
parent f54c34d1e0
commit 9b15b1d7e1
3 changed files with 93 additions and 20 deletions
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30
test/unit/util/handlers/CachedHandler.test.ts
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@@ -4,10 +4,10 @@ import {
} from '../../../../src/util/handlers/CachedHandler';
describe('A CachedHandler', (): void => {
const input = { entry: { key: 'value' }};
const input: any = { field1: { key: 'value' }, field2: { key: 'value' }, field3: { key: 'value2' }};
const output = 'response';
let source: jest.Mocked<AsyncHandler<{ entry: { key: string }}, string>>;
let handler: CachedHandler<{ entry: { key: string }}, string>;
let source: jest.Mocked<AsyncHandler<any, string>>;
let handler: CachedHandler<any, string>;
beforeEach(async(): Promise<void> => {
source = {
@@ -51,12 +51,34 @@ describe('A CachedHandler', (): void => {
expect(source.canHandle).toHaveBeenCalledTimes(0);
});
it('cannot handle input with multiple keys if the first key is already missing.', async(): Promise<void> => {
handler = new CachedHandler(source, [ 'field1', 'field3' ]);
await expect(handler.canHandle(input)).resolves.toBeUndefined();
expect(source.canHandle).toHaveBeenCalledTimes(1);
});
it('can use a specific field of the input as key.', async(): Promise<void> => {
handler = new CachedHandler(source, 'entry');
handler = new CachedHandler(source, [ 'field1' ]);
const copy = { ...input };
await expect(handler.handle(input)).resolves.toBe(output);
await expect(handler.handle(copy)).resolves.toBe(output);
expect(source.handle).toHaveBeenCalledTimes(1);
});
it('can use multiple fields of the object as keys.', async(): Promise<void> => {
handler = new CachedHandler(source, [ 'field1', 'field3' ]);
const copy = { ...input };
copy.field2 = { other: 'field' };
await expect(handler.handle(input)).resolves.toBe(output);
await expect(handler.handle(copy)).resolves.toBe(output);
expect(source.handle).toHaveBeenCalledTimes(1);
});
it('rejects empty field arrays.', async(): Promise<void> => {
expect((): any => new CachedHandler(source, []))
.toThrow('The fields parameter needs to have at least 1 entry if defined.');
});
});