feat(core-typescript): split vitest base into node + jsdom flavors

Adds vitest.base.node and vitest.base.jsdom with safety defaults
(clearMocks, restoreMocks, mockReset, unstubGlobals, sequence.shuffle)
and coverage thresholds (80/75/80/80). Migrates all feature configs
to the new base. Existing baseVitestConfig kept as backwards-compat
re-export of nodeVitestConfig.

Spec: §6.2

packages/auth/package.json

@@ -25,6 +25,7 @@
   },
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
+    "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
     "@types/node": "^22.0.0",
     "vitest": "^3.1.0"

packages/auth/vitest.config.ts

@@ -1,11 +1,9 @@
 import path from "node:path";
-import { baseVitestConfig } from "@repo/core-typescript/vitest.base";
+import { mergeConfig } from "vitest/config";
+import { nodeVitestConfig } from "@repo/core-typescript/vitest.base.node";
 
-export default {
+export default mergeConfig(nodeVitestConfig, {
-  ...baseVitestConfig,
   resolve: {
-    alias: {
+    alias: { "@": path.resolve(__dirname, "./src") },
-      "@": path.resolve(__dirname, "./src"),
-    },
   },
-};
+});

packages/blog/package.json

@@ -25,6 +25,7 @@
   },
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
+    "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
     "@types/node": "^22.0.0",
     "vitest": "^3.1.0"

packages/blog/vitest.config.ts

@@ -1,11 +1,9 @@
-import path from "path";
+import path from "node:path";
-import { baseVitestConfig } from "@repo/core-typescript/vitest.base";
+import { mergeConfig } from "vitest/config";
+import { nodeVitestConfig } from "@repo/core-typescript/vitest.base.node";
 
-export default {
+export default mergeConfig(nodeVitestConfig, {
-  ...baseVitestConfig,
   resolve: {
-    alias: {
+    alias: { "@": path.resolve(__dirname, "./src") },
-      "@": path.resolve(__dirname, "./src"),
-    },
   },
-};
+});

packages/core-shared/package.json

@@ -23,6 +23,7 @@
   },
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
+    "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
     "@types/node": "^22.0.0",
     "vitest": "^3.1.0"

packages/core-shared/vitest.config.ts

@@ -1,3 +1,9 @@
-import { baseVitestConfig } from "@repo/core-typescript/vitest.base";
+import path from "node:path";
+import { mergeConfig } from "vitest/config";
+import { nodeVitestConfig } from "@repo/core-typescript/vitest.base.node";
 
-export default baseVitestConfig;
+export default mergeConfig(nodeVitestConfig, {
+  resolve: {
+    alias: { "@": path.resolve(__dirname, "./src") },
+  },
+});

packages/core-typescript/package.json

@@ -7,7 +7,12 @@
     "./base.json": "./base.json",
     "./nextjs.json": "./nextjs.json",
     "./react-library.json": "./react-library.json",
-    "./vitest.base": "./vitest.base.ts"
+    "./vitest.base": "./vitest.base.ts",
+    "./vitest.base.node": "./vitest.base.node.ts",
+    "./vitest.base.jsdom": "./vitest.base.jsdom.ts"
+  },
+  "scripts": {
+    "test": "vitest run"
   },
   "devDependencies": {
     "vitest": "^3.1.0"

packages/core-typescript/vitest.base.jsdom.test.ts

@@ -0,0 +1,21 @@
+import { describe, it, expect } from "vitest";
+import { jsdomVitestConfig } from "./vitest.base.jsdom";
+
+describe("jsdomVitestConfig", () => {
+  it("uses jsdom environment", () => {
+    expect(jsdomVitestConfig.test?.environment).toBe("jsdom");
+  });
+  it("loads the jsdom setup file", () => {
+    expect(jsdomVitestConfig.test?.setupFiles).toEqual(
+      expect.arrayContaining(["@repo/core-testing/setup/jsdom"]),
+    );
+  });
+  it("includes tsx files", () => {
+    expect(jsdomVitestConfig.test?.include).toEqual(
+      expect.arrayContaining(["src/**/*.test.{ts,tsx}", "tests/**/*.test.{ts,tsx}"]),
+    );
+  });
+  it("inherits clearMocks from node base", () => {
+    expect(jsdomVitestConfig.test?.clearMocks).toBe(true);
+  });
+});

packages/core-typescript/vitest.base.jsdom.ts

@@ -0,0 +1,13 @@
+import { defineConfig, mergeConfig } from "vitest/config";
+import { nodeVitestConfig } from "./vitest.base.node.js";
+
+export const jsdomVitestConfig = mergeConfig(
+  nodeVitestConfig,
+  defineConfig({
+    test: {
+      environment: "jsdom",
+      setupFiles: ["@repo/core-testing/setup/jsdom"],
+      include: ["src/**/*.test.{ts,tsx}", "tests/**/*.test.{ts,tsx}"],
+    },
+  }),
+);

packages/core-typescript/vitest.base.node.test.ts

@@ -0,0 +1,28 @@
+import { describe, it, expect } from "vitest";
+import { nodeVitestConfig } from "./vitest.base.node";
+
+describe("nodeVitestConfig", () => {
+  it("uses node environment", () => {
+    expect(nodeVitestConfig.test?.environment).toBe("node");
+  });
+  it("enables clearMocks, restoreMocks, mockReset", () => {
+    expect(nodeVitestConfig.test?.clearMocks).toBe(true);
+    expect(nodeVitestConfig.test?.restoreMocks).toBe(true);
+    expect(nodeVitestConfig.test?.mockReset).toBe(true);
+  });
+  it("declares coverage thresholds", () => {
+    expect(nodeVitestConfig.test?.coverage?.thresholds).toMatchObject({
+      statements: 80, branches: 75, functions: 80, lines: 80,
+    });
+  });
+  it("includes src and tests glob", () => {
+    expect(nodeVitestConfig.test?.include).toEqual(
+      expect.arrayContaining(["src/**/*.test.ts", "tests/**/*.test.ts"]),
+    );
+  });
+  it("excludes factories and contracts from coverage", () => {
+    expect(nodeVitestConfig.test?.coverage?.exclude).toEqual(
+      expect.arrayContaining(["src/__factories__/**", "src/__contracts__/**"]),
+    );
+  });
+});

packages/core-typescript/vitest.base.node.ts

@@ -0,0 +1,29 @@
+import { defineConfig } from "vitest/config";
+
+export const nodeVitestConfig = defineConfig({
+  test: {
+    globals: true,
+    environment: "node",
+    include: ["src/**/*.test.ts", "tests/**/*.test.ts"],
+    setupFiles: ["@repo/core-testing/setup/node"],
+    clearMocks: true,
+    restoreMocks: true,
+    mockReset: true,
+    unstubGlobals: true,
+    sequence: { shuffle: true },
+    coverage: {
+      provider: "v8",
+      reporter: ["text", "html", "lcov"],
+      include: ["src/**"],
+      exclude: [
+        "src/**/*.test.{ts,tsx}",
+        "src/**/index.ts",
+        "src/__factories__/**",
+        "src/__contracts__/**",
+      ],
+      thresholds: {
+        statements: 80, branches: 75, functions: 80, lines: 80,
+      },
+    },
+  },
+});

packages/core-typescript/vitest.base.ts

@@ -1,15 +1,3 @@
-import { defineConfig } from "vitest/config";
+// Backwards-compat re-export. New code should import from
-
+// vitest.base.node or vitest.base.jsdom directly.
-export const baseVitestConfig = defineConfig({
+export { nodeVitestConfig as baseVitestConfig } from "./vitest.base.node.js";
-  test: {
-    globals: true,
-    environment: "node",
-    include: ["src/**/*.test.ts", "src/**/*.test.tsx", "tests/**/*.test.ts"],
-    coverage: {
-      provider: "v8",
-      reporter: ["text", "html"],
-      include: ["src/**"],
-      exclude: ["src/**/*.test.{ts,tsx}", "src/**/index.ts"],
-    },
-  },
-});

packages/core-typescript/vitest.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from "vitest/config";
+
+// Core-typescript tests the vitest base configs themselves.
+// They live at package root (not under src/), so we use a standalone config.
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: "node",
+    include: ["*.test.ts"],
+    clearMocks: true,
+    restoreMocks: true,
+  },
+});

packages/marketing-pages/package.json

@@ -25,6 +25,7 @@
   },
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
+    "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
     "@types/node": "^22.0.0",
     "vitest": "^3.1.0"

packages/marketing-pages/vitest.config.ts

@@ -1,11 +1,9 @@
 import path from "node:path";
-import { baseVitestConfig } from "@repo/core-typescript/vitest.base";
+import { mergeConfig } from "vitest/config";
+import { nodeVitestConfig } from "@repo/core-typescript/vitest.base.node";
 
-export default {
+export default mergeConfig(nodeVitestConfig, {
-  ...baseVitestConfig,
   resolve: {
-    alias: {
+    alias: { "@": path.resolve(__dirname, "./src") },
-      "@": path.resolve(__dirname, "./src"),
-    },
   },
-};
+});

packages/navigation/package.json

@@ -25,6 +25,7 @@
   },
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
+    "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
     "@types/node": "^22.0.0",
     "vitest": "^3.1.0"

packages/navigation/vitest.config.ts

@@ -1,11 +1,9 @@
 import path from "node:path";
-import { baseVitestConfig } from "@repo/core-typescript/vitest.base";
+import { mergeConfig } from "vitest/config";
+import { nodeVitestConfig } from "@repo/core-typescript/vitest.base.node";
 
-export default {
+export default mergeConfig(nodeVitestConfig, {
-  ...baseVitestConfig,
   resolve: {
-    alias: {
+    alias: { "@": path.resolve(__dirname, "./src") },
-      "@": path.resolve(__dirname, "./src"),
-    },
   },
-};
+});

pnpm-lock.yaml

@@ -256,6 +256,9 @@ importers:
       '@repo/core-eslint':
         specifier: workspace:*
         version: link:../core-eslint
+      '@repo/core-testing':
+        specifier: workspace:*
+        version: link:../core-testing
       '@repo/core-typescript':
         specifier: workspace:*
         version: link:../core-typescript
@@ -290,6 +293,9 @@ importers:
       '@repo/core-eslint':
         specifier: workspace:*
         version: link:../core-eslint
+      '@repo/core-testing':
+        specifier: workspace:*
+        version: link:../core-testing
       '@repo/core-typescript':
         specifier: workspace:*
         version: link:../core-typescript
@@ -413,6 +419,9 @@ importers:
       '@repo/core-eslint':
         specifier: workspace:*
         version: link:../core-eslint
+      '@repo/core-testing':
+        specifier: workspace:*
+        version: link:../core-testing
       '@repo/core-typescript':
         specifier: workspace:*
         version: link:../core-typescript
@@ -570,6 +579,9 @@ importers:
       '@repo/core-eslint':
         specifier: workspace:*
         version: link:../core-eslint
+      '@repo/core-testing':
+        specifier: workspace:*
+        version: link:../core-testing
       '@repo/core-typescript':
         specifier: workspace:*
         version: link:../core-typescript
@@ -620,6 +632,9 @@ importers:
       '@repo/core-eslint':
         specifier: workspace:*
         version: link:../core-eslint
+      '@repo/core-testing':
+        specifier: workspace:*
+        version: link:../core-testing
       '@repo/core-typescript':
         specifier: workspace:*
         version: link:../core-typescript