useInstrument.test.js
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useInstrument.test.js
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	const useInstrument = require( '../../../modules/ext.checkUser.tempAccounts/useInstrument.js' );

	describe( 'useInstrument', () => {
	it( 'should record events', () => {
	// Mock EventLogging infrastructure
	const submitInteraction = jest.fn();
	const newInstrument = jest.fn( () => ( {
	submitInteraction
	} ) );
	mw.eventLog = { newInstrument };

	const logEvent = useInstrument();

	logEvent( 'session_end' );
	logEvent( 'session_start', { sessionLength: 3600 } );

	expect( newInstrument ).toHaveBeenCalledTimes( 1 );

	expect( submitInteraction ).toHaveBeenCalledTimes( 2 );
	expect( submitInteraction ).toHaveBeenNthCalledWith( 1, 'session_end', {} );
	expect( submitInteraction ).toHaveBeenNthCalledWith( 2, 'session_start', {
	// eslint-disable-next-line camelcase
	action_context: JSON.stringify( { session_length: 3600 } )
	} );
	} );

	it( 'should not try to record events if EventLogging is unavailable', () => {
	// Simulate EventLogging being unavailable
	mw.eventLog = undefined;

	const logEvent = useInstrument();

	expect( () => {
	logEvent( 'session_end' );
	} ).not.toThrow();
	} );
	} );