df4799a12a
With the current code line-breaks are accepted not just after an operator, but after a decimal point as well. When looking at this again, the latter case seems prone to cause false positives and might also interfere with subsequent patches. Hence this is code is adjusted to actually do what the original commit message says, and nothing more.
302 lines
9.0 KiB
JavaScript
302 lines
9.0 KiB
JavaScript
/* Copyright 2017 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { Lexer, Linearization } from '../../src/core/parser';
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import { Name } from '../../src/core/primitives';
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import { StringStream } from '../../src/core/stream';
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describe('parser', function() {
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describe('Lexer', function() {
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it('should stop parsing numbers at the end of stream', function() {
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var input = new StringStream('11.234');
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var lexer = new Lexer(input);
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var result = lexer.getNumber();
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expect(result).toEqual(11.234);
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});
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it('should parse PostScript numbers', function() {
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var numbers = ['-.002', '34.5', '-3.62', '123.6e10', '1E-5', '-1.', '0.0',
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'123', '-98', '43445', '0', '+17'];
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for (var i = 0, ii = numbers.length; i < ii; i++) {
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var num = numbers[i];
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var input = new StringStream(num);
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var lexer = new Lexer(input);
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var result = lexer.getNumber();
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expect(result).toEqual(parseFloat(num));
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}
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});
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it('should ignore double negative before number', function() {
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var input = new StringStream('--205.88');
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var lexer = new Lexer(input);
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var result = lexer.getNumber();
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expect(result).toEqual(-205.88);
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});
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it('should ignore minus signs in the middle of number', function() {
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var input = new StringStream('205--.88');
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var lexer = new Lexer(input);
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var result = lexer.getNumber();
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expect(result).toEqual(205.88);
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});
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it('should ignore line-breaks between operator and digit in number',
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function() {
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let minusInput = new StringStream('-\r\n205.88');
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let minusLexer = new Lexer(minusInput);
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expect(minusLexer.getNumber()).toEqual(-205.88);
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let plusInput = new StringStream('+\r\n205.88');
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let plusLexer = new Lexer(plusInput);
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expect(plusLexer.getNumber()).toEqual(205.88);
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});
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it('should handle glued numbers and operators', function() {
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var input = new StringStream('123ET');
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var lexer = new Lexer(input);
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var value = lexer.getNumber();
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expect(value).toEqual(123);
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// The lexer must not have consumed the 'E'
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expect(lexer.currentChar).toEqual(0x45); // 'E'
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});
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it('should stop parsing strings at the end of stream', function() {
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var input = new StringStream('(1$4)');
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input.getByte = function(super_getByte) {
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// simulating end of file using null (see issue 2766)
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var ch = super_getByte.call(input);
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return (ch === 0x24 /* '$' */ ? -1 : ch);
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}.bind(input, input.getByte);
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var lexer = new Lexer(input);
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var result = lexer.getString();
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expect(result).toEqual('1');
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});
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it('should not throw exception on bad input', function() {
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// '8 0 2 15 5 2 2 2 4 3 2 4'
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// should be parsed as
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// '80 21 55 22 24 32'
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var input = new StringStream('<7 0 2 15 5 2 2 2 4 3 2 4>');
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var lexer = new Lexer(input);
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var result = lexer.getHexString();
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expect(result).toEqual('p!U"$2');
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});
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it('should ignore escaped CR and LF', function() {
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// '(\101\<CR><LF>\102)'
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// should be parsed as
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// "AB"
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var input = new StringStream('(\\101\\\r\n\\102\\\r\\103\\\n\\104)');
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var lexer = new Lexer(input);
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var result = lexer.getString();
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expect(result).toEqual('ABCD');
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});
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it('should handle Names with invalid usage of NUMBER SIGN (#)', function() {
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var inputNames = ['/# 680 0 R', '/#AQwerty', '/#A<</B'];
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var expectedNames = ['#', '#AQwerty', '#A'];
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for (var i = 0, ii = inputNames.length; i < ii; i++) {
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var input = new StringStream(inputNames[i]);
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var lexer = new Lexer(input);
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var result = lexer.getName();
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expect(result).toEqual(Name.get(expectedNames[i]));
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}
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});
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});
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describe('Linearization', function() {
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it('should not find a linearization dictionary', function () {
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// Not an actual linearization dictionary.
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var stream1 = new StringStream(
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'3 0 obj\n' +
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'<<\n' +
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'/Length 4622\n' +
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'/Filter /FlateDecode\n' +
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'>>\n' +
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'endobj'
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);
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expect(Linearization.create(stream1)).toEqual(null);
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// Linearization dictionary with invalid version number.
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var stream2 = new StringStream(
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'1 0 obj\n' +
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'<<\n' +
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'/Linearized 0\n' +
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'>>\n' +
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'endobj'
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);
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expect(Linearization.create(stream2)).toEqual(null);
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});
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it('should accept a valid linearization dictionary', function () {
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var stream = new StringStream(
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'131 0 obj\n' +
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'<<\n' +
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'/Linearized 1\n' +
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'/O 133\n' +
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'/H [ 1388 863 ]\n' +
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'/L 90\n' +
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'/E 43573\n' +
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'/N 18\n' +
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'/T 193883\n' +
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'>>\n' +
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'endobj'
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);
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var expectedLinearizationDict = {
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length: 90,
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hints: [1388, 863],
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objectNumberFirst: 133,
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endFirst: 43573,
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numPages: 18,
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mainXRefEntriesOffset: 193883,
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pageFirst: 0,
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};
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expect(Linearization.create(stream)).toEqual(expectedLinearizationDict);
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});
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it('should reject a linearization dictionary with invalid ' +
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'integer parameters', function () {
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// The /L parameter should be equal to the stream length.
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var stream1 = new StringStream(
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'1 0 obj\n' +
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'<<\n' +
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'/Linearized 1\n' +
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'/O 133\n' +
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'/H [ 1388 863 ]\n' +
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'/L 196622\n' +
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'/E 43573\n' +
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'/N 18\n' +
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'/T 193883\n' +
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'>>\n' +
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'endobj'
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);
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expect(function () {
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return Linearization.create(stream1);
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}).toThrow(new Error('The "L" parameter in the linearization ' +
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'dictionary does not equal the stream length.'));
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// The /E parameter should not be zero.
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var stream2 = new StringStream(
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'1 0 obj\n' +
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'<<\n' +
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'/Linearized 1\n' +
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'/O 133\n' +
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'/H [ 1388 863 ]\n' +
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'/L 84\n' +
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'/E 0\n' +
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'/N 18\n' +
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'/T 193883\n' +
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'>>\n' +
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'endobj'
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);
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expect(function () {
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return Linearization.create(stream2);
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}).toThrow(new Error('The "E" parameter in the linearization ' +
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'dictionary is invalid.'));
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// The /O parameter should be an integer.
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var stream3 = new StringStream(
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'1 0 obj\n' +
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'<<\n' +
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'/Linearized 1\n' +
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'/O /abc\n' +
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'/H [ 1388 863 ]\n' +
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'/L 89\n' +
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'/E 43573\n' +
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'/N 18\n' +
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'/T 193883\n' +
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'>>\n' +
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'endobj'
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);
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expect(function () {
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return Linearization.create(stream3);
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}).toThrow(new Error('The "O" parameter in the linearization ' +
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'dictionary is invalid.'));
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});
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it('should reject a linearization dictionary with invalid hint parameters',
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function () {
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// The /H parameter should be an array.
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var stream1 = new StringStream(
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'1 0 obj\n' +
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'<<\n' +
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'/Linearized 1\n' +
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'/O 133\n' +
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'/H 1388\n' +
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'/L 80\n' +
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'/E 43573\n' +
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'/N 18\n' +
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'/T 193883\n' +
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'>>\n' +
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'endobj'
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);
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expect(function () {
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return Linearization.create(stream1);
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}).toThrow(new Error('Hint array in the linearization dictionary ' +
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'is invalid.'));
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// The hint array should contain two, or four, elements.
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var stream2 = new StringStream(
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'1 0 obj\n' +
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'<<\n' +
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'/Linearized 1\n' +
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'/O 133\n' +
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'/H [ 1388 ]\n' +
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'/L 84\n' +
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'/E 43573\n' +
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'/N 18\n' +
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'/T 193883\n' +
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'>>\n' +
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'endobj'
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);
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expect(function () {
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return Linearization.create(stream2);
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}).toThrow(new Error('Hint array in the linearization dictionary ' +
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'is invalid.'));
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// The hint array should not contain zero.
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var stream3 = new StringStream(
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'1 0 obj\n' +
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'<<\n' +
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'/Linearized 1\n' +
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'/O 133\n' +
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'/H [ 1388 863 0 234]\n' +
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'/L 93\n' +
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'/E 43573\n' +
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'/N 18\n' +
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'/T 193883\n' +
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'>>\n' +
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'endobj'
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);
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expect(function () {
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return Linearization.create(stream3);
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}).toThrow(new Error('Hint (2) in the linearization dictionary ' +
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'is invalid.'));
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});
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});
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});
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