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index.js
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index.js
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/**
* External dependencies
*/
import { render } from '@testing-library/react';
/**
* Internal dependencies
*/
import { AutosaveMonitor } from '../';
describe( 'AutosaveMonitor', () => {
let setAutosaveTimerSpy;
beforeEach( () => {
jest.useFakeTimers( 'legacy' );
setAutosaveTimerSpy = jest.spyOn(
AutosaveMonitor.prototype,
'setAutosaveTimer'
);
} );
afterEach( () => {
jest.runOnlyPendingTimers();
jest.useRealTimers();
setAutosaveTimerSpy.mockClear();
} );
it( 'should render nothing', () => {
const { container } = render( <AutosaveMonitor isDirty /> );
expect( container ).toBeEmptyDOMElement();
} );
it( 'should start autosave timer after being mounted', () => {
render( <AutosaveMonitor isDirty /> );
expect( setAutosaveTimerSpy ).toHaveBeenCalled();
} );
it( 'should clear the autosave timer after being unmounted', () => {
const { rerender } = render( <AutosaveMonitor isDirty /> );
rerender( <div /> );
expect( clearTimeout ).toHaveBeenCalled();
} );
it( 'should clear and restart autosave timer when the interval changes', () => {
const { rerender } = render( <AutosaveMonitor isDirty /> );
rerender( <AutosaveMonitor isDirty interval={ 999 } /> );
expect( clearTimeout ).toHaveBeenCalled();
expect( setAutosaveTimerSpy ).toHaveBeenCalledTimes( 2 );
} );
it( 'should autosave when `editReference` changes', () => {
const autosave = jest.fn();
const { rerender } = render(
<AutosaveMonitor isDirty isAutosaveable autosave={ autosave } />
);
expect( autosave ).not.toHaveBeenCalled();
rerender(
<AutosaveMonitor
isDirty
isAutosaveable
autosave={ autosave }
editsReference={ [] }
/>
);
jest.runOnlyPendingTimers();
expect( autosave ).toHaveBeenCalledTimes( 1 );
} );
it( 'should autosave when `editReference` changes and the post becomes dirty', () => {
const autosave = jest.fn();
const { rerender } = render(
<AutosaveMonitor isAutosaveable autosave={ autosave } />
);
expect( autosave ).not.toHaveBeenCalled();
rerender(
<AutosaveMonitor
isDirty
isAutosaveable
autosave={ autosave }
editsReference={ [] }
/>
);
jest.runOnlyPendingTimers();
expect( autosave ).toHaveBeenCalledTimes( 1 );
} );
it( 'should not autosave when `editReference` changes and the post is not dirty anymore', () => {
const autosave = jest.fn();
const { rerender } = render(
<AutosaveMonitor isDirty isAutosaveable autosave={ autosave } />
);
expect( autosave ).not.toHaveBeenCalled();
rerender(
<AutosaveMonitor
isAutosaveable
autosave={ autosave }
editsReference={ [] }
/>
);
jest.runOnlyPendingTimers();
expect( autosave ).not.toHaveBeenCalled();
} );
it( 'should not autosave when `editReference` changes and the post is not autosaving', () => {
const autosave = jest.fn();
const { rerender } = render(
<AutosaveMonitor isAutosaveable autosave={ autosave } />
);
expect( autosave ).not.toHaveBeenCalled();
rerender(
<AutosaveMonitor
isAutosaveable
autosave={ autosave }
isAutosaving={ false }
editsReference={ [] }
/>
);
jest.runOnlyPendingTimers();
expect( autosave ).not.toHaveBeenCalled();
} );
it( 'should not autosave when `editReference` changes and the post started autosaving', () => {
const autosave = jest.fn();
const { rerender } = render(
<AutosaveMonitor
isAutosaveable
autosave={ autosave }
isAutosaving={ false }
/>
);
expect( autosave ).not.toHaveBeenCalled();
rerender(
<AutosaveMonitor
isAutosaveable
autosave={ autosave }
isAutosaving
editsReference={ [] }
/>
);
jest.runOnlyPendingTimers();
expect( autosave ).not.toHaveBeenCalled();
} );
it( 'should schedule itself in another {interval} ms', () => {
const { rerender } = render( <AutosaveMonitor isDirty /> );
rerender( <AutosaveMonitor isDirty isAutosaveable interval={ 5 } /> );
jest.runOnlyPendingTimers();
expect( setTimeout ).toHaveBeenLastCalledWith(
expect.any( Function ),
5000
);
} );
it( 'should schedule itself in 1000 ms if the post is not autosaveable at a time', () => {
const { rerender } = render( <AutosaveMonitor isDirty /> );
rerender(
<AutosaveMonitor isDirty isAutosaveable={ false } interval={ 5 } />
);
jest.runOnlyPendingTimers();
expect( setTimeout ).toHaveBeenLastCalledWith(
expect.any( Function ),
1000
);
} );
} );