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( function () {
module( 'jquery.byteLimit', QUnit.newMwEnvironment() );
test( '-- Initial check', function() {
expect(1);
ok( $.fn.byteLimit, 'jQuery.fn.byteLimit defined' );
} );
// Basic sendkey-implementation
$.addChars = function( $input, charstr ) {
var len = charstr.length;
for ( var i = 0; i < len; i++ ) {
// Keep track of the previous value
var prevVal = $input.val();
// Get the key code
var code = charstr.charCodeAt(i);
// Trigger event and undo if prevented
var event = new jQuery.Event( 'keypress', { keyCode: code, which: code, charCode: code } );
$input.trigger( event );
if ( !event.isDefaultPrevented() ) {
$input.val( prevVal + charstr.charAt(i) );
}
}
};
/**
* Test factory for $.fn.byteLimit
*
* @param $input {jQuery} jQuery object in an input element
* @param hasLimit {Boolean} Wether a limit should apply at all
* @param limit {Number} Limit (if used) otherwise undefined
* The limit should be less than 20 (the sample data's length)
*/
var byteLimitTest = function( options ) {
var opt = $.extend({
description: '',
$input: null,
sample: '',
hasLimit: false,
expected: '',
limit: null
}, options);
test( opt.description, function() {
opt.$input.appendTo( '#qunit-fixture' );
// Simulate pressing keys for each of the sample characters
$.addChars( opt.$input, opt.sample );
var rawVal = opt.$input.val(),
fn = opt.$input.data( 'byteLimit-callback' ),
newVal = $.isFunction( fn ) ? fn( rawVal ) : rawVal;
if ( opt.hasLimit ) {
expect(3);
ltOrEq( $.byteLength( newVal ), opt.limit, 'Prevent keypresses after byteLimit was reached, length never exceeded the limit' );
equal( $.byteLength( rawVal ), $.byteLength( opt.expected ), 'Not preventing keypresses too early, length has reached the expected length' );
equal( rawVal, opt.expected, 'New value matches the expected string' );
} else {
expect(2);
equal( newVal, opt.expected, 'New value matches the expected string' );
equal( $.byteLength( newVal ), $.byteLength( opt.expected ), 'Unlimited scenarios are not affected, expected length reached' );
}
} );
};
var
// Simple sample (20 chars, 20 bytes)
simpleSample = '12345678901234567890',
// 3 bytes (euro-symbol)
U_20AC = '\u20AC',
// Multi-byte sample (22 chars, 26 bytes)
mbSample = '1234567890' + U_20AC + '1234567890' + U_20AC;
byteLimitTest({
description: 'Plain text input',
$input: $( '<input>' )
.attr( 'type', 'text' ),
sample: simpleSample,
hasLimit: false,
expected: simpleSample
});
byteLimitTest({
description: 'Limit using the maxlength attribute',
$input: $( '<input>' )
.attr( 'type', 'text' )
.prop( 'maxLength', '10' )
.byteLimit(),
sample: simpleSample,
hasLimit: true,
limit: 10,
expected: '1234567890'
});
byteLimitTest({
description: 'Limit using a custom value',
$input: $( '<input>' )
.attr( 'type', 'text' )
.byteLimit( 10 ),
sample: simpleSample,
hasLimit: true,
limit: 10,
expected: '1234567890'
});
byteLimitTest({
description: 'Limit using a custom value, overriding maxlength attribute',
$input: $( '<input>' )
.attr( 'type', 'text' )
.prop( 'maxLength', '10' )
.byteLimit( 15 ),
sample: simpleSample,
hasLimit: true,
limit: 15,
expected: '123456789012345'
});
byteLimitTest({
description: 'Limit using a custom value (multibyte)',
$input: $( '<input>' )
.attr( 'type', 'text' )
.byteLimit( 14 ),
sample: mbSample,
hasLimit: true,
limit: 14,
expected: '1234567890' + U_20AC + '1'
});
byteLimitTest({
description: 'Limit using a custom value (multibyte) overlapping a byte',
$input: $( '<input>' )
.attr( 'type', 'text' )
.byteLimit( 12 ),
sample: mbSample,
hasLimit: true,
limit: 12,
expected: '1234567890' + '12'
});
byteLimitTest({
description: 'Pass the limit and a callback as input filter',
$input: $( '<input>' )
.attr( 'type', 'text' )
.byteLimit( 6, function( val ) {
// Invalid title
if ( val == '' ) {
return '';
}
// Return without namespace prefix
return new mw.Title( '' + val ).getMain();
} ),
sample: 'User:Sample',
hasLimit: true,
limit: 6, // 'Sample' length
expected: 'User:Sample'
});
byteLimitTest({
description: 'Limit using the maxlength attribute and pass a callback as input filter',
$input: $( '<input>' )
.attr( 'type', 'text' )
.prop( 'maxLength', '6' )
.byteLimit( function( val ) {
// Invalid title
if ( val === '' ) {
return '';
}
// Return without namespace prefix
return new mw.Title( '' + val ).getMain();
} ),
sample: 'User:Sample',
hasLimit: true,
limit: 6, // 'Sample' length
expected: 'User:Sample'
});
}() );
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