test(core-extensions): Add & configure vitest

packages/core-extensions/package.json

@@ -22,7 +22,8 @@
 		"rollup": "^4.40.0",
 		"rollup-plugin-dts": "^6.2.1",
 		"tslib": "^2.8.1",
-		"typescript": "latest"
+		"typescript": "latest",
+		"vitest": "^3.1.2"
 	},
 	"author": "T. R. Bernstein <ljspkgs01-project@tabshift.dev>",
 	"license": "EUPL-1.2",

packages/core-extensions/vitest.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+	test: {
+		alias: {
+			'@/': decodeURI(new URL('./src/', import.meta.url).pathname)
+		},
+		include: ['src/**/*.test.ts']
+	}
+})

pnpm-lock.yaml

@@ -44,6 +44,9 @@ importers:
       typescript:
         specifier: latest
         version: 5.8.3
+      vitest:
+        specifier: ^3.1.2
+        version: 3.1.2
 
   packages/prettier-config: {}