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[EuiComboBox] Replace autosizing input dependency with more performant utility #7215

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Sep 26, 2023
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6 changes: 6 additions & 0 deletions scripts/jest/setup/mocks.js
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,12 @@ jest.mock('./../../../src/components/icon', () => {
return { EuiIcon };
});

jest.mock('./../../../src/components/text_truncate', () => {
const rest = jest.requireActual('./../../../src/components/text_truncate');
const utils = require('./../../../src/components/text_truncate/utils.testenv');
return { ...rest, ...utils };
});

jest.mock('./../../../src/services/accessibility', () => {
const a11y = jest.requireActual('./../../../src/services/accessibility');
const {
Expand Down
36 changes: 36 additions & 0 deletions src/components/text_truncate/utils.testenv.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,36 @@
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/

import { TruncationUtils as _TruncationUtils } from './utils';

export class CanvasTextUtils {
constructor(_: any) {}
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Do you think it would be helpful to provide an name for this parameter, rather than _? Or are we using this as a standard?

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_ is generally the standard to indicate that a variable is unused but is present for some reason (e.g., in this case I'm adding it so that any test mock usages of it don't throw annoying type errors that are dissimilar to non-mocked class).

You'll notice in VSCode that when a named param is unused, vscode will fade it out and eslint may complain that it's unused, whereas when you rename it to _ it becomes unfaded and typically eslint will stop complaining.

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Ah ok! Thank you for the explanation!


computeFontFromElement = (_: HTMLElement) => '';

textWidth = 0;

currentText = '';
setTextToCheck = (text: string) => {
this.currentText = text;
};
}

export class TruncationUtils extends _TruncationUtils {
constructor(props: ConstructorParameters<typeof _TruncationUtils>[0]) {
super(props);
}

// Jest perf optimization - since there's no meaningful truncation we can make
// without meaningful width calculations, just return the full untruncated text
truncateStart = (_?: number) => this.fullText;
truncateEnd = (_?: number) => this.fullText;
truncateStartEndAtPosition = (_?: number) => this.fullText;
truncateStartEndAtMiddle = () => this.fullText;
truncateMiddle = () => this.fullText;
}