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Merge branch 'main' into check-for-fn-prop
Signed-off-by: Craig Perkins <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
| import { debounce } from './debounce'; | ||
|
|
||
| describe('debounce', () => { | ||
| let fn: Function; | ||
| beforeEach(() => { | ||
| fn = jest.fn(); | ||
| jest.useFakeTimers(); | ||
| }); | ||
| afterEach(() => { | ||
| jest.clearAllTimers(); | ||
| }); | ||
|
|
||
| test('it should call the debounced fn once at the end of the quiet time', () => { | ||
| const debounced = debounce(fn, 1000); | ||
|
|
||
| for (let i = 0; i < 100; i++) { | ||
| debounced(i); | ||
| } | ||
|
|
||
| jest.advanceTimersByTime(1001); | ||
| expect(fn).toBeCalledTimes(1); | ||
| expect(fn).toBeCalledWith(99); | ||
| }); | ||
|
|
||
| test("with a leading invocation, it should call the debounced fn once, if the time doens't pass", () => { | ||
| const debounced = debounce(fn, 1000, true); | ||
|
|
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| for (let i = 0; i < 100; i++) { | ||
| debounced(i); | ||
| } | ||
|
|
||
| jest.advanceTimersByTime(999); | ||
|
|
||
| expect(fn).toBeCalledTimes(1); | ||
| expect(fn).toBeCalledWith(0); | ||
| }); | ||
|
|
||
| test('with a leading invocation, it should call the debounced fn twice (at the beginning and at the end)', () => { | ||
| const debounced = debounce(fn, 1000, true); | ||
|
|
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| for (let i = 0; i < 100; i++) { | ||
| debounced(i); | ||
| } | ||
|
|
||
| jest.advanceTimersByTime(1500); | ||
|
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||
| expect(fn).toBeCalledTimes(2); | ||
| expect(fn).toBeCalledWith(0); | ||
| expect(fn).toBeCalledWith(99); | ||
| }); | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| /** | ||
| * @param func The function to be debounced. | ||
| * @param delay The time in milliseconds to wait before invoking the function again after the last invocation. | ||
| * @param leading An optional parameter that, when true, allows the function to be invoked immediately upon the first call. | ||
| */ | ||
| export const debounce = (func: Function, delay: number, leading?: boolean) => { | ||
| let timerId: NodeJS.Timeout; | ||
|
|
||
| return (...args: any) => { | ||
| if (!timerId && leading) { | ||
| func(...args); | ||
| } | ||
| clearTimeout(timerId); | ||
|
|
||
| timerId = setTimeout(() => func(...args), delay); | ||
| }; | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -38,3 +38,4 @@ export { | |
| getWorkspaceIdFromUrl, | ||
| cleanWorkspaceId, | ||
| } from '../../utils'; | ||
| export { debounce } from './debounce'; | ||
6 changes: 6 additions & 0 deletions
6
...ic/application/components/dashboard_top_nav/__snapshots__/dashboard_top_nav.test.tsx.snap
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