X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/19e297c21b10b1b8a3acad5e73fc71dcb35db44a..6932310fd58ebef145fa01eb76edf7150284d8ea:/tests/qunit/suites/resources/mediawiki/mediawiki.requestIdleCallback.test.js

diff --git a/tests/qunit/suites/resources/mediawiki/mediawiki.requestIdleCallback.test.js b/tests/qunit/suites/resources/mediawiki/mediawiki.requestIdleCallback.test.js
new file mode 100644
index 00000000..df02693b
--- /dev/null
+++ b/tests/qunit/suites/resources/mediawiki/mediawiki.requestIdleCallback.test.js
@@ -0,0 +1,108 @@
+( function ( mw ) {
+	QUnit.module( 'mediawiki.requestIdleCallback', QUnit.newMwEnvironment( {
+		setup: function () {
+			var clock = this.clock = this.sandbox.useFakeTimers();
+
+			this.sandbox.stub( mw, 'now', function () {
+				return +new Date();
+			} );
+
+			this.tick = function ( forward ) {
+				return clock.tick( forward || 1 );
+			};
+
+			// Always test the polyfill, not native
+			this.sandbox.stub( mw, 'requestIdleCallback', mw.requestIdleCallbackInternal );
+		}
+	} ) );
+
+	QUnit.test( 'callback', function ( assert ) {
+		var sequence;
+
+		mw.requestIdleCallback( function () {
+			sequence.push( 'x' );
+		} );
+		mw.requestIdleCallback( function () {
+			sequence.push( 'y' );
+		} );
+		mw.requestIdleCallback( function () {
+			sequence.push( 'z' );
+		} );
+
+		sequence = [];
+		this.tick();
+		assert.deepEqual( sequence, [ 'x', 'y', 'z' ] );
+	} );
+
+	QUnit.test( 'nested', function ( assert ) {
+		var sequence;
+
+		mw.requestIdleCallback( function () {
+			sequence.push( 'x' );
+		} );
+		// Task Y is a task that schedules another task.
+		mw.requestIdleCallback( function () {
+			function other() {
+				sequence.push( 'y' );
+			}
+			mw.requestIdleCallback( other );
+		} );
+		mw.requestIdleCallback( function () {
+			sequence.push( 'z' );
+		} );
+
+		sequence = [];
+		this.tick();
+		assert.deepEqual( sequence, [ 'x', 'z' ] );
+
+		sequence = [];
+		this.tick();
+		assert.deepEqual( sequence, [ 'y' ] );
+	} );
+
+	QUnit.test( 'timeRemaining', function ( assert ) {
+		var sequence,
+			tick = this.tick,
+			jobs = [
+				{ time: 10, key: 'a' },
+				{ time: 20, key: 'b' },
+				{ time: 10, key: 'c' },
+				{ time: 20, key: 'd' },
+				{ time: 10, key: 'e' }
+			];
+
+		mw.requestIdleCallback( function doWork( deadline ) {
+			var job;
+			while ( jobs[ 0 ] && deadline.timeRemaining() > 15 ) {
+				job = jobs.shift();
+				tick( job.time );
+				sequence.push( job.key );
+			}
+			if ( jobs[ 0 ] ) {
+				mw.requestIdleCallback( doWork );
+			}
+		} );
+
+		sequence = [];
+		tick();
+		assert.deepEqual( sequence, [ 'a', 'b', 'c' ] );
+
+		sequence = [];
+		tick();
+		assert.deepEqual( sequence, [ 'd', 'e' ] );
+	} );
+
+	if ( window.requestIdleCallback ) {
+		QUnit.test( 'native', function ( assert ) {
+			var done = assert.async();
+			// Remove polyfill and clock stub
+			mw.requestIdleCallback.restore();
+			this.clock.restore();
+			mw.requestIdleCallback( function () {
+				assert.expect( 0 );
+				done();
+			} );
+		} );
+	}
+
+}( mediaWiki ) );