mediawiki-extensions-Echo/tests/qunit/model/test_mw.echo.dm.UnreadNotificationCounter.js

QUnit.module( 'ext.echo.dm - UnreadNotificationCounter' );

QUnit.test.each( '.getCappedNotificationCount()', [
	{ input: 5, output: 5 },
	{ input: 20, output: 11 },
	{ input: 10, output: 10 }
], function ( assert, data ) {
	var model = new mw.echo.dm.UnreadNotificationCounter(
		null,
		'all', // type
		10 // max
	);
	assert.strictEqual(
		model.getCappedNotificationCount( data.input ),
		data.output,
		'count for ' + data.input
	);
} );

QUnit.test( '.estimateChange()', function ( assert ) {
	var model = new mw.echo.dm.UnreadNotificationCounter(
		null,
		'all', // type
		99 // max
	);
	// Set initial
	model.setCount( 50 );

	model.estimateChange( -10 );
	assert.strictEqual(
		model.getCount(),
		40, // 50-10
		'Estimation within range'
	);

	model.estimateChange( 70 );
	assert.strictEqual(
		model.getCount(),
		100, // Estimation reached above cap - cap is set
		'Estimation brings count to cap'
	);

	model.estimateChange( -10 );
	assert.strictEqual(
		model.getCount(),
		100, // We are already above cap, count will not change
		'Estimation while counter is outside of cap - no change'
	);
} );

QUnit.test( '.setCount()', function ( assert ) {
	var results = [];
	var model = new mw.echo.dm.UnreadNotificationCounter(
		null,
		'all', // type
		99 // max
	);

	// Listen to event
	model.on( 'countChange', function ( count ) {
		results.push( count );
	} );

	// Trigger events
	model.setCount( 50 ); // [ 50 ]
	model.setCount( 300, true ); // (estimate, above max, bring to cap) [ 50, 100 ]
	model.setCount( -1, true ); // (estimate while counter is above cap, no event) [ 50, 100 ]
	model.setCount( 200 ); // (setting above cap, value is capped, same as current, no event) [ 50,100 ]
	model.setCount( 10 ); // [ 50, 100, 10 ]

	assert.deepEqual(
		results,
		[ 50, 100, 10 ],
		'countChange events emitted.'
	);
} );