MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / 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 (file)
index 0000000..df02693
--- /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 ) );