mirror of
https://github.com/microsoft/playwright.git
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27 lines
1.2 KiB
TypeScript
27 lines
1.2 KiB
TypeScript
/**
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* Copyright Microsoft Corporation. All rights reserved.
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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 { getComparator } from '../../packages/playwright-core/lib/utils/comparators';
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const pngComparator = getComparator('image/png');
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type ComparatorResult = { diff?: Buffer; errorMessage: string; } | null;
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type ImageComparatorOptions = { threshold?: number, maxDiffPixels?: number, maxDiffPixelRatio?: number };
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export function comparePNGs(actual: Buffer, expected: Buffer, options: ImageComparatorOptions = {}): ComparatorResult {
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// Strict threshold by default in our tests.
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return pngComparator(actual, expected, { comparator: 'ssim-cie94', threshold: 0, ...options });
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}
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