100 lines
3.0 KiB
JavaScript
100 lines
3.0 KiB
JavaScript
/* Copyright 2020 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 { Dict, Name, Ref } from "../../src/core/primitives.js";
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import { incrementalUpdate, writeDict } from "../../src/core/writer.js";
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import { bytesToString } from "../../src/shared/util.js";
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import { StringStream } from "../../src/core/stream.js";
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describe("Writer", function () {
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describe("Incremental update", function () {
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it("should update a file with new objects", function (done) {
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const originalData = new Uint8Array();
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const newRefs = [
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{ ref: Ref.get(123, 0x2d), data: "abc\n" },
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{ ref: Ref.get(456, 0x4e), data: "defg\n" },
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];
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const xrefInfo = {
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newRef: Ref.get(789, 0),
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startXRef: 314,
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fileIds: ["id", ""],
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rootRef: null,
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infoRef: null,
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encrypt: null,
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filename: "foo.pdf",
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info: {},
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};
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let data = incrementalUpdate({ originalData, xrefInfo, newRefs });
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data = bytesToString(data);
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const expected =
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"\nabc\n" +
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"defg\n" +
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"789 0 obj\n" +
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"<< /Size 790 /Prev 314 /Type /XRef /Index [0 1 123 1 456 1 789 1] " +
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"/ID [(id) (\x01#Eg\x89\xab\xcd\xef\xfe\xdc\xba\x98vT2\x10)] " +
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"/W [1 1 2] /Length 16>> stream\n" +
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"\x00\x01\xff\xff" +
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"\x01\x01\x00\x2d" +
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"\x01\x05\x00\x4e" +
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"\x01\x0a\x00\x00\n" +
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"endstream\n" +
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"endobj\n" +
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"startxref\n" +
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"10\n" +
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"%%EOF\n";
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expect(data).toEqual(expected);
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done();
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});
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});
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describe("writeDict", function () {
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it("should write a Dict", function (done) {
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const dict = new Dict(null);
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dict.set("A", Name.get("B"));
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dict.set("B", Ref.get(123, 456));
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dict.set("C", 789);
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dict.set("D", "hello world");
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dict.set("E", "(hello\\world)");
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dict.set("F", [1.23001, 4.50001, 6]);
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const gdict = new Dict(null);
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gdict.set("H", 123.00001);
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const string = "a stream";
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const stream = new StringStream(string);
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stream.dict = new Dict(null);
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stream.dict.set("Length", string.length);
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gdict.set("I", stream);
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dict.set("G", gdict);
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const buffer = [];
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writeDict(dict, buffer, null);
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const expected =
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"<< /A /B /B 123 456 R /C 789 /D (hello world) " +
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"/E (\\(hello\\\\world\\)) /F [1.23 4.5 6] " +
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"/G << /H 123 /I << /Length 8>> stream\n" +
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"a stream\n" +
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"endstream\n>>>>";
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expect(buffer.join("")).toEqual(expected);
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done();
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});
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});
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});
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