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( function () { 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( $el, i ) { // Add character to the value return $el.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.$input, opt.sample ); assert.strictEqual( opt.$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' } ); }() );

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