element-web/test/utils/MessageDiffUtils-test.tsx

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/*
Copyright 2024 New Vector Ltd.
Copyright 2023 The Matrix.org Foundation C.I.C.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
import { render } from "@testing-library/react";
import type { IContent } from "matrix-js-sdk/src/matrix";
import type React from "react";
import { editBodyDiffToHtml } from "../../src/utils/MessageDiffUtils";
describe("editBodyDiffToHtml", () => {
function buildContent(message: string): IContent {
return {
body: message,
format: "org.matrix.custom.html",
formatted_body: message,
msgtype: "m.text",
};
}
function renderDiff(before: string, after: string) {
const node = editBodyDiffToHtml(buildContent(before), buildContent(after));
return render(node as React.ReactElement);
}
it.each([
["simple word changes", "hello", "world"],
["central word changes", "beginning middle end", "beginning :smile: end"],
["text deletions", "<b>hello</b> world", "<b>hello</b>"],
["text additions", "<b>hello</b>", "<b>hello</b> world"],
["block element additions", "hello", "hello <p>world</p>"],
["inline element additions", "hello", "hello <q>world</q>"],
["block element deletions", `hi <blockquote>there</blockquote>`, "hi"],
["inline element deletions", `hi <em>there</em>`, "hi"],
["element replacements", `hi <i>there</i>`, "hi <em>there</em>"],
["attribute modifications", `<a href="#hi">hi</a>`, `<a href="#bye">hi</a>`],
["attribute deletions", `<a href="#hi">hi</a>`, `<a>hi</a>`],
["attribute additions", `<a>hi</a>`, `<a href="#/room/!123">hi</a>`],
["handles empty tags", `<a>hi</a>`, `<a><h1></h1></a> hi`],
])("renders %s", (_label, before, after) => {
const { container } = renderDiff(before, after);
expect(container).toMatchSnapshot();
});
// see https://github.com/fiduswriter/diffDOM/issues/90
// fixed in diff-dom in 4.2.2+
it("deduplicates diff steps", () => {
const { container } = renderDiff("<div><em>foo</em> bar baz</div>", "<div><em>foo</em> bar bay</div>");
expect(container).toMatchSnapshot();
});
it("handles non-html input", () => {
const before: IContent = {
body: "who knows what's going on <strong>here</strong>",
format: "org.exotic.encoding",
formatted_body: "who knows what's going on <strong>here</strong>",
msgtype: "m.text",
};
const after: IContent = {
...before,
body: "who knows what's going on <strong>there</strong>",
formatted_body: "who knows what's going on <strong>there</strong>",
};
const { container } = render(editBodyDiffToHtml(before, after) as React.ReactElement);
expect(container).toMatchSnapshot();
});
// see https://github.com/vector-im/element-web/issues/23665
it("handles complex transformations", () => {
const { container } = renderDiff(
'<span data-mx-maths="{☃️}^\\infty"><code>{☃️}^\\infty</code></span>',
'<span data-mx-maths="{😃}^\\infty"><code>{😃}^\\infty</code></span>',
);
expect(container).toMatchSnapshot();
});
});