83 lines
2.7 KiB
83 lines
2.7 KiB
/* -*- 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 ignore double negative before number', function() { |
|
var input = new StringStream('--205.88'); |
|
var lexer = new Lexer(input); |
|
var result = lexer.getNumber(); |
|
|
|
expect(result).toEqual(-205.88); |
|
}); |
|
|
|
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'); |
|
}); |
|
|
|
it('should ignore escaped CR and LF', function() { |
|
// '(\101\<CR><LF>\102)' |
|
// should be parsed as |
|
// "AB" |
|
var input = new StringStream('(\\101\\\r\n\\102\\\r\\103\\\n\\104)'); |
|
var lexer = new Lexer(input); |
|
var result = lexer.getString(); |
|
|
|
expect(result).toEqual('ABCD'); |
|
}); |
|
}); |
|
});
|
|
|