Datepicker: More zero-padding formatDate tests with years 0-99

Author: MoonE

tests/unit/datepicker/options.js

@@ -1124,7 +1124,7 @@ QUnit.test( "Ticket #7244: date parser does not fail when too many numbers are p
 } );
 
 QUnit.test( "formatDate", function( assert ) {
-	assert.expect( 21 );
+	assert.expect( 24 );
 	testHelper.init( "#inp" );
 	var gmtDate, fr, settings;
 	assert.equal( $.datepicker.formatDate( "d m y", new Date( 2001, 2 - 1, 3 ) ),
@@ -1165,6 +1165,9 @@ QUnit.test( "formatDate", function( assert ) {
 		new Date( 2001, 4 - 1, 9 ), settings ), "jour 9 de avril ('lundi'), 2001",
 		"Format date 'jour' d 'de' MM (''DD''), yy with settings" );
 
+	assert.equal( $.datepicker.formatDate( "yy-mm-dd", $.datepicker._createDate( 0, 0, 1 ) ), "0000-01-01" );
+	assert.equal( $.datepicker.formatDate( "yy-mm-dd", $.datepicker._createDate( 12, 0, 1 ) ), "0012-01-01" );
+	assert.equal( $.datepicker.formatDate( "yy-mm-dd", $.datepicker._createDate( 99, 0, 1 ) ), "0099-01-01" );
 	assert.equal( $.datepicker.formatDate( "yy-mm-dd", new Date( 100, 0, 1 ) ), "0100-01-01" );
 	assert.equal( $.datepicker.formatDate( "yy-mm-dd", new Date( 999, 0, 1 ) ), "0999-01-01" );
 	assert.equal( $.datepicker.formatDate( "yy-mm-dd", new Date( 1000, 0, 1 ) ), "1000-01-01" );