From f9ef08e90d78800bfe226753f3ace612a83bef82 Mon Sep 17 00:00:00 2001
From: Mart <119670595+mcdr2k@users.noreply.github.com>
Date: Thu, 1 Aug 2024 23:13:51 +0200
Subject: [PATCH] fix(mocha-runner): properly restrict tests to run

Correctly restrict tests to run by including the start and end characters (`^` and `$`) inside the `--grep` regex.
---
 packages/mocha-runner/src/mocha-test-runner.ts            | 2 +-
 packages/mocha-runner/test/unit/mocha-test-runner.spec.ts | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/mocha-runner/src/mocha-test-runner.ts b/packages/mocha-runner/src/mocha-test-runner.ts
index 2c7b148608..b04b29e393 100644
--- a/packages/mocha-runner/src/mocha-test-runner.ts
+++ b/packages/mocha-runner/src/mocha-test-runner.ts
@@ -114,7 +114,7 @@ export class MochaTestRunner implements TestRunner {
     this.instrumenterContext.hitLimit = hitLimit;
     this.instrumenterContext.hitCount = hitLimit ? 0 : undefined;
     if (testFilter) {
-      const metaRegExp = testFilter.map((testId) => `(${escapeRegExp(testId)})`).join('|');
+      const metaRegExp = testFilter.map((testId) => `(^${escapeRegExp(testId)}$)`).join('|');
       const regex = new RegExp(metaRegExp);
       this.mocha.grep(regex);
     } else {
diff --git a/packages/mocha-runner/test/unit/mocha-test-runner.spec.ts b/packages/mocha-runner/test/unit/mocha-test-runner.spec.ts
index 9a3a499aba..d4c2b71e96 100644
--- a/packages/mocha-runner/test/unit/mocha-test-runner.spec.ts
+++ b/packages/mocha-runner/test/unit/mocha-test-runner.spec.ts
@@ -314,12 +314,12 @@ describe(MochaTestRunner.name, () => {
 
     it('should use `grep` to when the test filter is specified', async () => {
       await actMutantRun(factory.mutantRunOptions({ testFilter: ['foo should be bar', 'baz should be qux'] }));
-      expect(mocha.grep).calledWith(new RegExp('(foo should be bar)|(baz should be qux)'));
+      expect(mocha.grep).calledWith(new RegExp('(^foo should be bar$)|(^baz should be qux$)'));
     });
 
     it('should escape regex characters when filtering', async () => {
       await actMutantRun(factory.mutantRunOptions({ testFilter: ['should escape *.\\, but not /'] }));
-      expect(mocha.grep).calledWith(new RegExp('(should escape \\*\\.\\\\, but not /)'));
+      expect(mocha.grep).calledWith(new RegExp('(^should escape \\*\\.\\\\, but not /$)'));
     });
 
     it('should be able to report a killed mutant when a test fails', async () => {