@poupe/material-color-utilities/utils/test_utils.js

Algorithms and utilities that power the Material Design 3 (M3) color system, including choosing theme colors from images and creating tones of colors; all in a new color space.

/**
 * @license
 * Copyright 2021 Google LLC
 *
 * 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 'jasmine';
import { hexFromArgb } from './string_utils.js';
/**
 * Exports a matcher called `matchesColor` that takes two numbers, and logs
 * the equivalent hex codes on failure.
 *
 * To use, add to your test file:
 *  beforeEach(() => {
 *    jasmine.addMatchers(customMatchers);
 *  });
 *
 * Then it can be used as a standard matcher:
 *  expect(scheme.onSurface).matchesColor(0xff000000);
 */
export const customMatchers = {
    matchesColor(util, customEqualityTesters) {
        return {
            compare(actual, expected) {
                const pass = util.equals(actual, expected);
                return {
                    pass,
                    message: `Expected color ${hexFromArgb(actual)} to ${pass ? 'NOT' : ''} match: ${hexFromArgb(expected)}`,
                };
            },
        };
    },
};
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