Yu Cong
44db9807a1
Some checks failed
Types tests / Test (lts/*) (push) Has been cancelled
Lint / Lint (lts/*) (push) Has been cancelled
CodeQL / Analyze (javascript) (push) Has been cancelled
CI / Test (20) (push) Has been cancelled
CI / Test (22) (push) Has been cancelled
CI / Test (24) (push) Has been cancelled
42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
/* Copyright 2017 Mozilla Foundation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
import { Dict } from "../../src/core/primitives.js";
|
|
import { PredictorStream } from "../../src/core/predictor_stream.js";
|
|
import { Stream } from "../../src/core/stream.js";
|
|
|
|
describe("stream", function () {
|
|
describe("PredictorStream", function () {
|
|
it("should decode simple predictor data", function () {
|
|
const dict = new Dict();
|
|
dict.set("Predictor", 12);
|
|
dict.set("Colors", 1);
|
|
dict.set("BitsPerComponent", 8);
|
|
dict.set("Columns", 2);
|
|
|
|
const input = new Stream(
|
|
new Uint8Array([2, 100, 3, 2, 1, 255, 2, 1, 255]),
|
|
0,
|
|
9,
|
|
dict
|
|
);
|
|
const predictor = new PredictorStream(input, /* length = */ 9, dict);
|
|
const result = predictor.getBytes(6);
|
|
|
|
expect(result).toEqual(new Uint8Array([100, 3, 101, 2, 102, 1]));
|
|
});
|
|
});
|
|
});
|