From b6c41caae84cfd37b6bf4a60071800a233f5d0e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ari=20Perkki=C3=B6?= <ari.perkkio@gmail.com>
Date: Mon, 23 Jan 2023 11:26:16 +0200
Subject: [PATCH] fix(coverage): c8 to log warning when run in Stackblitz
 (#2735)

---
 packages/coverage-c8/package.json    | 2 ++
 packages/coverage-c8/src/provider.ts | 5 +++++
 pnpm-lock.yaml                       | 4 ++++
 3 files changed, 11 insertions(+)

diff --git a/packages/coverage-c8/package.json b/packages/coverage-c8/package.json
index 191acaa62e31..3b8812e93374 100644
--- a/packages/coverage-c8/package.json
+++ b/packages/coverage-c8/package.json
@@ -43,6 +43,8 @@
   },
   "dependencies": {
     "c8": "^7.12.0",
+    "picocolors": "^1.0.0",
+    "std-env": "^3.3.1",
     "vitest": "workspace:*"
   },
   "devDependencies": {
diff --git a/packages/coverage-c8/src/provider.ts b/packages/coverage-c8/src/provider.ts
index 5e5d2b5b8580..91be9b82b9cf 100644
--- a/packages/coverage-c8/src/provider.ts
+++ b/packages/coverage-c8/src/provider.ts
@@ -3,6 +3,8 @@ import _url from 'url'
 import type { Profiler } from 'inspector'
 import { takeCoverage } from 'v8'
 import { extname, resolve } from 'pathe'
+import c from 'picocolors'
+import { provider } from 'std-env'
 import type { RawSourceMap } from 'vite-node'
 import { coverageConfigDefaults } from 'vitest/config'
 // eslint-disable-next-line no-restricted-imports
@@ -52,6 +54,9 @@ export class C8CoverageProvider implements CoverageProvider {
   async reportCoverage({ allTestsRun }: ReportContext = {}) {
     takeCoverage()
 
+    if (provider === 'stackblitz')
+      this.ctx.logger.log(c.blue(' % ') + c.yellow('@vitest/coverage-c8 does not work on Stackblitz. Report will be empty.'))
+
     const options: ConstructorParameters<typeof Report>[0] = {
       ...this.options,
       all: this.options.all && allTestsRun,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index efacc9fcf190..0c1af694b3d2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -652,10 +652,14 @@ importers:
     specifiers:
       c8: ^7.12.0
       pathe: ^1.1.0
+      picocolors: ^1.0.0
+      std-env: ^3.3.1
       vite-node: workspace:*
       vitest: workspace:*
     dependencies:
       c8: 7.12.0
+      picocolors: 1.0.0
+      std-env: 3.3.1
       vitest: link:../vitest
     devDependencies:
       pathe: 1.1.0