[Init] Initial commit - NetMesh terminal manager

components/terminal/keywordHighlightRegex.test.ts

@@ -0,0 +1,50 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { forEachNonEmptyRe2Match, forEachNonEmptyRegexMatch } from "./keywordHighlightRegex.ts";
+
+test("forEachNonEmptyRegexMatch returns normal consuming matches", () => {
+  const regex = /\bfoo\b/gi;
+  const indices: number[] = [];
+
+  forEachNonEmptyRegexMatch(regex, "foo bar foo", (match) => {
+    indices.push(match.index);
+  });
+
+  assert.deepEqual(indices, [0, 8]);
+});
+
+test("forEachNonEmptyRegexMatch skips zero-width matches without looping forever", () => {
+  const regex = /(?=foo)/g;
+  const indices: number[] = [];
+
+  forEachNonEmptyRegexMatch(regex, "foo foo", (match) => {
+    indices.push(match.index);
+  });
+
+  assert.deepEqual(indices, []);
+});
+
+test("forEachNonEmptyRegexMatch resets reused regex state before scanning", () => {
+  const regex = /\d+/g;
+  const indices: number[] = [];
+
+  regex.lastIndex = 99;
+  forEachNonEmptyRegexMatch(regex, "1 22 333", (match) => {
+    indices.push(match.index);
+  });
+
+  assert.deepEqual(indices, [0, 2, 5]);
+});
+
+test("forEachNonEmptyRe2Match returns global case-insensitive UTF-16 ranges", () => {
+  const ranges: Array<[number, number]> = [];
+  forEachNonEmptyRe2Match("foo+", "x😀FOO yfoo", (start, length) => {
+    ranges.push([start, length]);
+  });
+  assert.deepEqual(ranges, [[3, 3], [8, 3]]);
+});
+
+test("forEachNonEmptyRe2Match rejects expressions outside RE2", () => {
+  assert.throws(() => forEachNonEmptyRe2Match("(a)\\1", "aa", () => {}));
+});