9e262ae7fa
Please find additional details about the ESLint rule at https://eslint.org/docs/rules/prefer-const With the recent introduction of Prettier this sort of mass enabling of ESLint rules becomes a lot easier, since the code will be automatically reformatted as necessary to account for e.g. changed line lengths. Note that this patch is generated automatically, by using the ESLint `--fix` argument, and will thus require some additional clean-up (which is done separately).
79 lines
2.4 KiB
JavaScript
79 lines
2.4 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 { PredictorStream, Stream } from "../../src/core/stream.js";
|
|
import { Dict } from "../../src/core/primitives.js";
|
|
|
|
describe("stream", function() {
|
|
beforeEach(function() {
|
|
jasmine.addMatchers({
|
|
toMatchTypedArray(util, customEqualityTesters) {
|
|
return {
|
|
compare(actual, expected) {
|
|
var result = {};
|
|
if (actual.length !== expected.length) {
|
|
result.pass = false;
|
|
result.message =
|
|
"Array length: " +
|
|
actual.length +
|
|
", expected: " +
|
|
expected.length;
|
|
return result;
|
|
}
|
|
result.pass = true;
|
|
for (var i = 0, ii = expected.length; i < ii; i++) {
|
|
var a = actual[i],
|
|
b = expected[i];
|
|
if (a !== b) {
|
|
result.pass = false;
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
},
|
|
};
|
|
},
|
|
});
|
|
});
|
|
describe("PredictorStream", function() {
|
|
it("should decode simple predictor data", function() {
|
|
var dict = new Dict();
|
|
dict.set("Predictor", 12);
|
|
dict.set("Colors", 1);
|
|
dict.set("BitsPerComponent", 8);
|
|
dict.set("Columns", 2);
|
|
|
|
var input = new Stream(
|
|
new Uint8Array([2, 100, 3, 2, 1, 255, 2, 1, 255]),
|
|
0,
|
|
9,
|
|
dict
|
|
);
|
|
var predictor = new PredictorStream(input, /* length = */ 9, dict);
|
|
var result = predictor.getBytes(6);
|
|
|
|
expect(result).toMatchTypedArray(
|
|
new Uint8Array([100, 3, 101, 2, 102, 1])
|
|
);
|
|
|
|
predictor.reset();
|
|
const clampedResult = predictor.getBytes(6, /* forceClamped = */ true);
|
|
expect(clampedResult).toEqual(
|
|
new Uint8ClampedArray([100, 3, 101, 2, 102, 1])
|
|
);
|
|
});
|
|
});
|
|
});
|