From 0a2875e373301b387930c1297cb2eea23b2a1e10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ari=20Perkki=C3=B6?= <ari.perkkio@gmail.com>
Date: Fri, 21 Apr 2023 09:09:47 +0300
Subject: [PATCH] fix(coverage): throw error if fail to load built-in provider
 (#3217)

---
 packages/vitest/src/integrations/coverage.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/vitest/src/integrations/coverage.ts b/packages/vitest/src/integrations/coverage.ts
index 95b81af656ad..983334fafd20 100644
--- a/packages/vitest/src/integrations/coverage.ts
+++ b/packages/vitest/src/integrations/coverage.ts
@@ -17,6 +17,10 @@ async function resolveCoverageProviderModule(options: CoverageOptions | undefine
 
   if (provider === 'c8' || provider === 'istanbul') {
     const { default: coverageModule } = await loader.executeId(CoverageProviderMap[provider])
+
+    if (!coverageModule)
+      throw new Error(`Failed to load ${CoverageProviderMap[provider]}. Default export is missing.`)
+
     return coverageModule
   }