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Merge pull request #6404 from Snuffleupagus/linearization-unit-tests

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Add unit-tests for Linearization dictionary parsing (PR 5023 follow-up)
This commit is contained in:
Yury Delendik 2015-08-31 07:38:55 -05:00
commit 943efea876
1 changed files with 172 additions and 1 deletions
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173
test/unit/parser_spec.js
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@ -1,6 +1,6 @@
/* -*- 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 */
/* globals expect, it, describe, StringStream, Lexer, Linearization */
'use strict';
@ -80,4 +80,175 @@ describe('parser', function() {
expect(result).toEqual('ABCD');
});
});
describe('Linearization', function() {
it('should not find a linearization dictionary', function () {
// Not an actual linearization dictionary.
var stream1 = new StringStream(
'3 0 obj\n' +
'<<\n' +
'/Length 4622\n' +
'/Filter /FlateDecode\n' +
'>>\n' +
'endobj'
);
expect(Linearization.create(stream1)).toEqual(null);
// Linearization dictionary with invalid version number.
var stream2 = new StringStream(
'1 0 obj\n' +
'<<\n' +
'/Linearized 0\n' +
'>>\n' +
'endobj'
);
expect(Linearization.create(stream2)).toEqual(null);
});
it('should accept a valid linearization dictionary', function () {
var stream = new StringStream(
'131 0 obj\n' +
'<<\n' +
'/Linearized 1\n' +
'/O 133\n' +
'/H [ 1388 863 ]\n' +
'/L 90\n' +
'/E 43573\n' +
'/N 18\n' +
'/T 193883\n' +
'>>\n' +
'endobj'
);
var expectedLinearizationDict = {
length: 90,
hints: [1388, 863],
objectNumberFirst: 133,
endFirst: 43573,
numPages: 18,
mainXRefEntriesOffset: 193883,
pageFirst: 0,
};
expect(Linearization.create(stream)).toEqual(expectedLinearizationDict);
});
it('should reject a linearization dictionary with invalid ' +
'integer parameters', function () {
// The /L parameter should be equal to the stream length.
var stream1 = new StringStream(
'1 0 obj\n' +
'<<\n' +
'/Linearized 1\n' +
'/O 133\n' +
'/H [ 1388 863 ]\n' +
'/L 196622\n' +
'/E 43573\n' +
'/N 18\n' +
'/T 193883\n' +
'>>\n' +
'endobj'
);
expect(function () {
return Linearization.create(stream1);
}).toThrow(new Error('The "L" parameter in the linearization ' +
'dictionary does not equal the stream length.'));
// The /E parameter should not be zero.
var stream2 = new StringStream(
'1 0 obj\n' +
'<<\n' +
'/Linearized 1\n' +
'/O 133\n' +
'/H [ 1388 863 ]\n' +
'/L 84\n' +
'/E 0\n' +
'/N 18\n' +
'/T 193883\n' +
'>>\n' +
'endobj'
);
expect(function () {
return Linearization.create(stream2);
}).toThrow(new Error('The "E" parameter in the linearization ' +
'dictionary is invalid.'));
// The /O parameter should be an integer.
var stream3 = new StringStream(
'1 0 obj\n' +
'<<\n' +
'/Linearized 1\n' +
'/O /abc\n' +
'/H [ 1388 863 ]\n' +
'/L 89\n' +
'/E 43573\n' +
'/N 18\n' +
'/T 193883\n' +
'>>\n' +
'endobj'
);
expect(function () {
return Linearization.create(stream3);
}).toThrow(new Error('The "O" parameter in the linearization ' +
'dictionary is invalid.'));
});
it('should reject a linearization dictionary with invalid hint parameters',
function () {
// The /H parameter should be an array.
var stream1 = new StringStream(
'1 0 obj\n' +
'<<\n' +
'/Linearized 1\n' +
'/O 133\n' +
'/H 1388\n' +
'/L 80\n' +
'/E 43573\n' +
'/N 18\n' +
'/T 193883\n' +
'>>\n' +
'endobj'
);
expect(function () {
return Linearization.create(stream1);
}).toThrow(new Error('Hint array in the linearization dictionary ' +
'is invalid.'));
// The hint array should contain two, or four, elements.
var stream2 = new StringStream(
'1 0 obj\n' +
'<<\n' +
'/Linearized 1\n' +
'/O 133\n' +
'/H [ 1388 ]\n' +
'/L 84\n' +
'/E 43573\n' +
'/N 18\n' +
'/T 193883\n' +
'>>\n' +
'endobj'
);
expect(function () {
return Linearization.create(stream2);
}).toThrow(new Error('Hint array in the linearization dictionary ' +
'is invalid.'));
// The hint array should not contain zero.
var stream3 = new StringStream(
'1 0 obj\n' +
'<<\n' +
'/Linearized 1\n' +
'/O 133\n' +
'/H [ 1388 863 0 234]\n' +
'/L 93\n' +
'/E 43573\n' +
'/N 18\n' +
'/T 193883\n' +
'>>\n' +
'endobj'
);
expect(function () {
return Linearization.create(stream3);
}).toThrow(new Error('Hint (2) in the linearization dictionary ' +
'is invalid.'));
});
});
});