66 lines
1.8 KiB
TypeScript
66 lines
1.8 KiB
TypeScript
/**
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* @license
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* Copyright 2025 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/// <reference types="vitest/globals" />
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/**
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* @license
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* Copyright 2025 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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import { Assertion, expect } from 'vitest';
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import type { TextBuffer } from '../ui/components/shared/text-buffer.js';
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// RegExp to detect invalid characters: backspace, and ANSI escape codes
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// eslint-disable-next-line no-control-regex
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const invalidCharsRegex = /[\b\x1b]/;
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function toHaveOnlyValidCharacters(this: Assertion, buffer: TextBuffer) {
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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const { isNot } = this as any;
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let pass = true;
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const invalidLines: Array<{ line: number; content: string }> = [];
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for (let i = 0; i < buffer.lines.length; i++) {
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const line = buffer.lines[i];
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if (line.includes('\n')) {
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pass = false;
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invalidLines.push({ line: i, content: line });
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break; // Fail fast on newlines
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}
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if (invalidCharsRegex.test(line)) {
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pass = false;
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invalidLines.push({ line: i, content: line });
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}
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}
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return {
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pass,
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message: () =>
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`Expected buffer ${isNot ? 'not ' : ''}to have only valid characters, but found invalid characters in lines:\n${invalidLines
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.map((l) => ` [${l.line}]: "${l.content}"`) /* This line was changed */
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.join('\n')}`,
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actual: buffer.lines,
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expected: 'Lines with no line breaks, backspaces, or escape codes.',
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};
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}
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expect.extend({
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toHaveOnlyValidCharacters,
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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} as any);
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// Extend Vitest's `expect` interface with the custom matcher's type definition.
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declare module 'vitest' {
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interface Assertion<T> {
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toHaveOnlyValidCharacters(): T;
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}
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interface AsymmetricMatchersContaining {
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toHaveOnlyValidCharacters(): void;
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}
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}
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