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- 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, 9, dict);
- const result = predictor.getBytes(6);
- expect(result).toEqual(new Uint8Array([100, 3, 101, 2, 102, 1]));
- });
- });
- });
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