4a66eccedc
Now, it computes the numbers with only basic arithmetic operations, without first creating a string and then calling parseFloat. The new function doesn't behave exactly the same as the old one. In particular, the old behaviour was that when there was a number immediatly followed by an 'E', the 'E' was consumed. Now it's not. It allows for "glued" numbers and operators. Also, the new function is faster and consumes less memory.
67 lines
2.1 KiB
JavaScript
67 lines
2.1 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
|
|
/* globals expect, it, describe, StringStream, Lexer */
|
|
|
|
'use strict';
|
|
|
|
describe('parser', function() {
|
|
describe('Lexer', function() {
|
|
it('should stop parsing numbers at the end of stream', function() {
|
|
var input = new StringStream('11.234');
|
|
var lexer = new Lexer(input);
|
|
var result = lexer.getNumber();
|
|
|
|
expect(result).toEqual(11.234);
|
|
});
|
|
|
|
it('should parse PostScript numbers', function() {
|
|
var numbers = ['-.002', '34.5', '-3.62', '123.6e10', '1E-5', '-1.', '0.0',
|
|
'123', '-98', '43445', '0', '+17'];
|
|
for (var i=0, ii=numbers.length; i<ii; i++) {
|
|
var num = numbers[i];
|
|
var input = new StringStream(num);
|
|
var lexer = new Lexer(input);
|
|
var result = lexer.getNumber();
|
|
|
|
expect(result).toEqual(parseFloat(num));
|
|
}
|
|
});
|
|
|
|
|
|
it('should handle glued numbers and operators', function() {
|
|
var input = new StringStream('123ET');
|
|
var lexer = new Lexer(input);
|
|
var value = lexer.getNumber();
|
|
|
|
expect(value).toEqual(123);
|
|
// The lexer must not have consumed the 'E'
|
|
expect(lexer.currentChar).toEqual(0x45); // 'E'
|
|
});
|
|
|
|
it('should stop parsing strings at the end of stream', function() {
|
|
var input = new StringStream('(1$4)');
|
|
input.getByte = function(super_getByte) {
|
|
// simulating end of file using null (see issue 2766)
|
|
var ch = super_getByte.call(input);
|
|
return ch === 0x24 /* '$' */ ? -1 : ch;
|
|
}.bind(input, input.getByte);
|
|
var lexer = new Lexer(input);
|
|
var result = lexer.getString();
|
|
|
|
expect(result).toEqual('1');
|
|
});
|
|
|
|
it('should not throw exception on bad input', function() {
|
|
// '8 0 2 15 5 2 2 2 4 3 2 4'
|
|
// should be parsed as
|
|
// '80 21 55 22 24 32'
|
|
var input = new StringStream('<7 0 2 15 5 2 2 2 4 3 2 4>');
|
|
var lexer = new Lexer(input);
|
|
var result = lexer.getHexString();
|
|
|
|
expect(result).toEqual('p!U"$2');
|
|
});
|
|
});
|
|
});
|
|
|