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+( function ( $, mw ) {
+ var simpleSample, U_20AC, poop, mbSample;
+
+ QUnit.module( 'jquery.lengthLimit', QUnit.newMwEnvironment() );
+
+ // Simple sample (20 chars, 20 bytes)
+ simpleSample = '12345678901234567890';
+
+ // 3 bytes (euro-symbol)
+ U_20AC = '\u20AC';
+
+ // Outside of the BMP (pile of poo emoji)
+ poop = '\uD83D\uDCA9'; // "💩"
+
+ // Multi-byte sample (22 chars, 26 bytes)
+ mbSample = '1234567890' + U_20AC + '1234567890' + U_20AC;
+
+ // Basic sendkey-implementation
+ function addChars( $input, charstr ) {
+ var c, len;
+
+ function x( $input, i ) {
+ // Add character to the value
+ return $input.val() + charstr.charAt( i );
+ }
+
+ for ( c = 0, len = charstr.length; c < len; c += 1 ) {
+ $input
+ .val( x( $input, c ) )
+ .trigger( 'change' );
+ }
+ }
+
+ /**
+ * Test factory for $.fn.byteLimit
+ *
+ * @param {Object} options
+ * @param {string} options.description Test name
+ * @param {jQuery} options.$input jQuery object in an input element
+ * @param {string} options.sample Sequence of characters to simulate being
+ * added one by one
+ * @param {string} options.expected Expected final value of `$input`
+ */
+ function byteLimitTest( options ) {
+ var opt = $.extend( {
+ description: '',
+ $input: null,
+ sample: '',
+ expected: ''
+ }, options );
+
+ QUnit.test( opt.description, function ( assert ) {
+ opt.$input.appendTo( '#qunit-fixture' );
+
+ // Simulate pressing keys for each of the sample characters
+ addChars( opt.$input, opt.sample );
+
+ assert.equal(
+ opt.$input.val(),
+ opt.expected,
+ 'New value matches the expected string'
+ );
+ } );
+ }
+
+ byteLimitTest( {
+ description: 'Plain text input',
+ $input: $( '<input>' ).attr( 'type', 'text' ),
+ sample: simpleSample,
+ expected: simpleSample
+ } );
+
+ byteLimitTest( {
+ description: 'Plain text input. Calling byteLimit with no parameters and no maxlength attribute (T38310)',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit(),
+ sample: simpleSample,
+ expected: simpleSample
+ } );
+
+ byteLimitTest( {
+ description: 'Limit using the maxlength attribute',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .attr( 'maxlength', '10' )
+ .byteLimit(),
+ sample: simpleSample,
+ expected: '1234567890'
+ } );
+
+ byteLimitTest( {
+ description: 'Limit using a custom value',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit( 10 ),
+ sample: simpleSample,
+ expected: '1234567890'
+ } );
+
+ byteLimitTest( {
+ description: 'Limit using a custom value, overriding maxlength attribute',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .attr( 'maxlength', '10' )
+ .byteLimit( 15 ),
+ sample: simpleSample,
+ expected: '123456789012345'
+ } );
+
+ byteLimitTest( {
+ description: 'Limit using a custom value (multibyte)',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit( 14 ),
+ sample: mbSample,
+ expected: '1234567890' + U_20AC + '1'
+ } );
+
+ byteLimitTest( {
+ description: 'Limit using a custom value (multibyte, outside BMP)',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit( 3 ),
+ sample: poop,
+ expected: ''
+ } );
+
+ byteLimitTest( {
+ description: 'Limit using a custom value (multibyte) overlapping a byte',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit( 12 ),
+ sample: mbSample,
+ expected: '123456789012'
+ } );
+
+ byteLimitTest( {
+ description: 'Pass the limit and a callback as input filter',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit( 6, function ( val ) {
+ var title = mw.Title.newFromText( String( val ) );
+ // Return without namespace prefix
+ return title ? title.getMain() : '';
+ } ),
+ sample: 'User:Sample',
+ expected: 'User:Sample'
+ } );
+
+ byteLimitTest( {
+ description: 'Limit using the maxlength attribute and pass a callback as input filter',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .attr( 'maxlength', '6' )
+ .byteLimit( function ( val ) {
+ var title = mw.Title.newFromText( String( val ) );
+ // Return without namespace prefix
+ return title ? title.getMain() : '';
+ } ),
+ sample: 'User:Sample',
+ expected: 'User:Sample'
+ } );
+
+ byteLimitTest( {
+ description: 'Pass the limit and a callback as input filter',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit( 6, function ( val ) {
+ var title = mw.Title.newFromText( String( val ) );
+ // Return without namespace prefix
+ return title ? title.getMain() : '';
+ } ),
+ sample: 'User:Example',
+ // The callback alters the value to be used to calculeate
+ // the length. The altered value is "Exampl" which has
+ // a length of 6, the "e" would exceed the limit.
+ expected: 'User:Exampl'
+ } );
+
+ byteLimitTest( {
+ description: 'Input filter that increases the length',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit( 10, function ( text ) {
+ return 'prefix' + text;
+ } ),
+ sample: simpleSample,
+ // Prefix adds 6 characters, limit is reached after 4
+ expected: '1234'
+ } );
+
+ // Regression tests for T43450
+ byteLimitTest( {
+ description: 'Input filter of which the base exceeds the limit',
+ $input: $( '<input>' ).attr( 'type', 'text' )
+ .byteLimit( 3, function ( text ) {
+ return 'prefix' + text;
+ } ),
+ sample: simpleSample,
+ expected: ''
+ } );
+
+ QUnit.test( 'Confirm properties and attributes set', function ( assert ) {
+ var $el;
+
+ $el = $( '<input>' ).attr( 'type', 'text' )
+ .attr( 'maxlength', '7' )
+ .appendTo( '#qunit-fixture' )
+ .byteLimit();
+
+ assert.strictEqual( $el.attr( 'maxlength' ), '7', 'maxlength attribute unchanged for simple limit' );
+
+ $el = $( '<input>' ).attr( 'type', 'text' )
+ .attr( 'maxlength', '7' )
+ .appendTo( '#qunit-fixture' )
+ .byteLimit( 12 );
+
+ assert.strictEqual( $el.attr( 'maxlength' ), '12', 'maxlength attribute updated for custom limit' );
+
+ $el = $( '<input>' ).attr( 'type', 'text' )
+ .attr( 'maxlength', '7' )
+ .appendTo( '#qunit-fixture' )
+ .byteLimit( 12, function ( val ) {
+ return val;
+ } );
+
+ assert.strictEqual( $el.attr( 'maxlength' ), undefined, 'maxlength attribute removed for limit with callback' );
+
+ $( '<input>' ).attr( 'type', 'text' )
+ .addClass( 'mw-test-byteLimit-foo' )
+ .attr( 'maxlength', '7' )
+ .appendTo( '#qunit-fixture' );
+
+ $( '<input>' ).attr( 'type', 'text' )
+ .addClass( 'mw-test-byteLimit-foo' )
+ .attr( 'maxlength', '12' )
+ .appendTo( '#qunit-fixture' );
+
+ $el = $( '.mw-test-byteLimit-foo' );
+
+ assert.strictEqual( $el.length, 2, 'Verify that there are no other elements clashing with this test suite' );
+
+ $el.byteLimit();
+ } );
+
+ QUnit.test( 'Trim from insertion when limit exceeded', function ( assert ) {
+ var $el;
+
+ // Use a new <input> because the bug only occurs on the first time
+ // the limit it reached (T42850)
+ $el = $( '<input>' ).attr( 'type', 'text' )
+ .appendTo( '#qunit-fixture' )
+ .byteLimit( 3 )
+ .val( 'abc' ).trigger( 'change' )
+ .val( 'zabc' ).trigger( 'change' );
+
+ assert.strictEqual( $el.val(), 'abc', 'Trim from the insertion point (at 0), not the end' );
+
+ $el = $( '<input>' ).attr( 'type', 'text' )
+ .appendTo( '#qunit-fixture' )
+ .byteLimit( 3 )
+ .val( 'abc' ).trigger( 'change' )
+ .val( 'azbc' ).trigger( 'change' );
+
+ assert.strictEqual( $el.val(), 'abc', 'Trim from the insertion point (at 1), not the end' );
+ } );
+
+ QUnit.test( 'Do not cut up false matching substrings in emoji insertions', function ( assert ) {
+ var $el,
+ oldVal = '\uD83D\uDCA9\uD83D\uDCA9', // "💩💩"
+ newVal = '\uD83D\uDCA9\uD83D\uDCB9\uD83E\uDCA9\uD83D\uDCA9', // "💩💹🢩💩"
+ expected = '\uD83D\uDCA9\uD83D\uDCB9\uD83D\uDCA9'; // "💩💹💩"
+
+ // Possible bad results:
+ // * With no surrogate support:
+ // '\uD83D\uDCA9\uD83D\uDCB9\uD83E\uDCA9' "💩💹🢩"
+ // * With correct trimming but bad detection of inserted text:
+ // '\uD83D\uDCA9\uD83D\uDCB9\uDCA9' "💩💹�"
+
+ $el = $( '<input>' ).attr( 'type', 'text' )
+ .appendTo( '#qunit-fixture' )
+ .byteLimit( 12 )
+ .val( oldVal ).trigger( 'change' )
+ .val( newVal ).trigger( 'change' );
+
+ assert.strictEqual( $el.val(), expected, 'Pasted emoji correctly trimmed at the end' );
+ } );
+
+ byteLimitTest( {
+ description: 'Unpaired surrogates do not crash',
+ $input: $( '<input>' ).attr( 'type', 'text' ).byteLimit( 4 ),
+ sample: '\uD800\uD800\uDFFF',
+ expected: '\uD800'
+ } );
+
+}( jQuery, mediaWiki ) );
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