51 lines
1.5 KiB
TypeScript
51 lines
1.5 KiB
TypeScript
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import test from "node:test";
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import assert from "node:assert/strict";
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import { forEachNonEmptyRe2Match, forEachNonEmptyRegexMatch } from "./keywordHighlightRegex.ts";
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test("forEachNonEmptyRegexMatch returns normal consuming matches", () => {
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const regex = /\bfoo\b/gi;
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const indices: number[] = [];
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forEachNonEmptyRegexMatch(regex, "foo bar foo", (match) => {
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indices.push(match.index);
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});
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assert.deepEqual(indices, [0, 8]);
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});
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test("forEachNonEmptyRegexMatch skips zero-width matches without looping forever", () => {
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const regex = /(?=foo)/g;
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const indices: number[] = [];
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forEachNonEmptyRegexMatch(regex, "foo foo", (match) => {
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indices.push(match.index);
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});
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assert.deepEqual(indices, []);
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});
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test("forEachNonEmptyRegexMatch resets reused regex state before scanning", () => {
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const regex = /\d+/g;
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const indices: number[] = [];
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regex.lastIndex = 99;
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forEachNonEmptyRegexMatch(regex, "1 22 333", (match) => {
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indices.push(match.index);
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});
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assert.deepEqual(indices, [0, 2, 5]);
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});
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test("forEachNonEmptyRe2Match returns global case-insensitive UTF-16 ranges", () => {
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const ranges: Array<[number, number]> = [];
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forEachNonEmptyRe2Match("foo+", "x😀FOO yfoo", (start, length) => {
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ranges.push([start, length]);
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});
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assert.deepEqual(ranges, [[3, 3], [8, 3]]);
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});
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test("forEachNonEmptyRe2Match rejects expressions outside RE2", () => {
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assert.throws(() => forEachNonEmptyRe2Match("(a)\\1", "aa", () => {}));
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});
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