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@bitovi/snapshot-test
Advanced tools
@bitovi/snapshot-test
Take an image of an iframe and compare it to a saved image.
import {compareToSnapshot} from "@bitovi/snapshot-test";
compareToSnapshot({
// A URL you want to test against.
// Must be same domain.
url: "./style-guide.html",
// The width and height of an iframe used
// to load the URL. The <body> will be rendered.
// So if your <body> is greater than `height`
// an image of that size will be created.
width: 1000, // defaults to 1000
height: 400, // defaults to 400
// The path to where to keep your saved images.
snapshotDir: "./",
// An identifier used to figure out the saved
// image's path.
//
// For example, if the tests were running in google `chrome`
// on a `high definition` display, an image would be looked
// in the following places:
//
// 1. style-guide-1000-hd-chrome.png
// 2. style-guide-1000-hd.png
// 3. style-guide.png
snapshotPrefix: "style-guide",
// This function is called after the iframe has loaded.
// You can make adjustments to the document before the snapshot
// is taken. This function should return a promise when
// the snapshot is ready to be taken.
prepareDocument(iframe) { return Promise },
// Options passed to pixelmatch that does the diff.
pixelMatchOptions: { ... }
})
// `compareToSnapshot` returns a promise.
.then(function(){
// If the promise resolves, the images are equal.
// You should pass your test!
}, function(err) {
// If the promise rejects, the images are not equal!
// You should fail your test.
// An err object is returned with useful information.
// A DOM element you can insert
// to see the difference and save a new snapshot.
err.html
});
Keywords
FAQs
Visual snapshot testing for everyone
The npm package @bitovi/snapshot-test receives a total of 0 weekly downloads. As such, @bitovi/snapshot-test popularity was classified as not popular.
We found that @bitovi/snapshot-test demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
Package last updated on 03 Apr 2019
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