From c65b65994d07a209482be528c84ec208dfbb3c17 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ari=20Perkki=C3=B6?= <ari.perkkio@gmail.com>
Date: Wed, 15 May 2024 20:04:00 +0300
Subject: [PATCH] fix: clean up empty coverage reports directory

---
 .../option-tests/fixture.test.ts              |  8 +++++++
 test/coverage-test/testing-options.mjs        | 21 ++++++++++++++++++-
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 test/coverage-test/option-tests/fixture.test.ts

diff --git a/test/coverage-test/option-tests/fixture.test.ts b/test/coverage-test/option-tests/fixture.test.ts
new file mode 100644
index 0000000000000..2121ecdf3a0f8
--- /dev/null
+++ b/test/coverage-test/option-tests/fixture.test.ts
@@ -0,0 +1,8 @@
+// Generic test fixture to generate some coverage
+
+import { test } from 'vitest'
+import { add } from '../src/utils'
+
+test('cover some lines', () => {
+  add(1, 2)
+})
diff --git a/test/coverage-test/testing-options.mjs b/test/coverage-test/testing-options.mjs
index e806dd07dd5a4..690713f6d5556 100644
--- a/test/coverage-test/testing-options.mjs
+++ b/test/coverage-test/testing-options.mjs
@@ -1,4 +1,4 @@
-import { readFileSync, rmSync, writeFileSync } from 'node:fs'
+import { existsSync, readFileSync, readdirSync, rmSync, writeFileSync } from 'node:fs'
 import { startVitest } from 'vitest/node'
 
 /**
@@ -147,6 +147,25 @@ const testCases = [
       process.exitCode = 0
     },
   },
+  {
+    testConfig: {
+      name: 'remove empty coverages directory',
+      include: ['option-tests/fixture.test.ts'],
+      coverage: {
+        reporter: 'text',
+        all: false,
+        include: ['src/utils.ts'],
+      },
+    },
+    after() {
+      if (existsSync('./coverage')) {
+        if (readdirSync('./coverage').length !== 0)
+          throw new Error('Test case expected coverage directory to be empty')
+
+        throw new Error('Empty coverage directory was not cleaned')
+      }
+    },
+  },
 ]
 
 for (const provider of ['v8', 'istanbul']) {