Add expect.assertions() support for Node.js tests

- Add afterEachTest hook to BDD for assertion state cleanup
- Implement assertion state checking in mod.node.ts
- Add @std/expect and @std/internal via JSR registry (.npmrc)
- Add test scripts to context-api, fx, signals, timebox packages
- All 43 tests now pass on Node.js with expect.assertions() support

Author: taras

.npmrc

@@ -0,0 +1 @@
+@jsr:registry=https://npm.jsr.io

bdd/bdd.ts

@@ -17,6 +17,8 @@ export interface TestPrimitives {
     only: (name: string, fn: () => void | Promise<void>) => void;
   };
   afterAll: (fn: () => void | Promise<void>) => void;
+  /** Optional hook called after each test for assertion state cleanup */
+  afterEachTest?: () => void;
 }
 
 /**
@@ -42,7 +44,8 @@ export interface BDD {
  * This allows the BDD module to work with different test runners.
  */
 export function createBDD(primitives: TestPrimitives): BDD {
-  const { describe: $describe, it: $it, afterAll: $afterAll } = primitives;
+  const { describe: $describe, it: $it, afterAll: $afterAll, afterEachTest } =
+    primitives;
 
   let current: TestAdapter | undefined;
 
@@ -91,6 +94,7 @@ export function createBDD(primitives: TestPrimitives): BDD {
     }
     $it(desc, async () => {
       const result = await adapter.runTest(body);
+      afterEachTest?.();
       if (!result.ok) {
         throw result.error;
       }
@@ -106,6 +110,7 @@ export function createBDD(primitives: TestPrimitives): BDD {
     const adapter = current!;
     $it.only(desc, async () => {
       const result = await adapter.runTest(body);
+      afterEachTest?.();
       if (!result.ok) {
         throw result.error;
       }

bdd/mod.node.ts

@@ -1,10 +1,41 @@
 import { after, describe as $describe, it as $it } from "node:test";
+import { getAssertionState } from "@std/internal/assertion-state";
 import { createBDD } from "./bdd.ts";
 
+/**
+ * Checks and resets the assertion state after each test.
+ * This ensures expect.assertions() works correctly with Node's test runner.
+ */
+function checkAndResetAssertions(): void {
+  const state = getAssertionState();
+
+  // Check if expect.hasAssertions() was used but no assertion was triggered
+  if (state.checkAssertionErrorState()) {
+    state.resetAssertionState();
+    throw new Error(
+      "Expected at least one assertion to be called but received none",
+    );
+  }
+
+  // Check if expect.assertions(n) count was not satisfied
+  if (state.checkAssertionCountSatisfied()) {
+    const expected = state.assertionCount;
+    const actual = state.assertionTriggeredCount;
+    state.resetAssertionState();
+    throw new Error(
+      `Expected ${expected} assertions to be called but received ${actual}`,
+    );
+  }
+
+  // Reset for next test
+  state.resetAssertionState();
+}
+
 const bdd = createBDD({
   describe: $describe,
   it: $it,
   afterAll: after,
+  afterEachTest: checkAndResetAssertions,
 });
 
 export const { describe, it, beforeAll, beforeEach } = bdd;

context-api/package.json

@@ -4,7 +4,11 @@
   "type": "module",
   "license": "MIT",
   "exports": "./mod.ts",
+  "scripts": {
+    "test": "node --experimental-strip-types --test *.test.ts"
+  },
   "dependencies": {
-    "effection": "^3"
+    "effection": "^3",
+    "@effectionx/bdd": "workspace:*"
   }
 }

deno.json

@@ -2,6 +2,7 @@
   "nodeModulesDir": "none",
   "imports": {
     "effection": "npm:effection@^3",
+    "@std/expect": "jsr:@std/expect@^1",
     "@deno/dnt": "jsr:@deno/dnt@0.42.3",
     "@std/path": "jsr:@std/path@^1",
     "zod": "npm:zod@3.23.8",

fx/package.json

@@ -4,7 +4,11 @@
   "type": "module",
   "license": "MIT",
   "exports": "./mod.ts",
+  "scripts": {
+    "test": "node --experimental-strip-types --test *.test.ts"
+  },
   "dependencies": {
-    "effection": "^3"
+    "effection": "^3",
+    "@effectionx/bdd": "workspace:*"
   }
 }

package.json

@@ -7,6 +7,8 @@
     "test": "pnpm -r --if-present test"
   },
   "dependencies": {
+    "@std/expect": "npm:@jsr/std__expect@^1",
+    "@std/internal": "npm:@jsr/std__internal@^1",
     "effection": "^3"
   },
   "volta": {

pnpm-lock.yaml

@@ -4,8 +4,12 @@
   "type": "module",
   "license": "MIT",
   "exports": "./mod.ts",
+  "scripts": {
+    "test": "node --experimental-strip-types --test *.test.ts"
+  },
   "dependencies": {
     "effection": "^3",
-    "immutable": "^5"
+    "immutable": "^5",
+    "@effectionx/bdd": "workspace:*"
   }
 }

signals/package.json

@@ -4,7 +4,11 @@
   "type": "module",
   "license": "MIT",
   "exports": "./mod.ts",
+  "scripts": {
+    "test": "node --experimental-strip-types --test *.test.ts"
+  },
   "dependencies": {
-    "effection": "^3"
+    "effection": "^3",
+    "@effectionx/bdd": "workspace:*"
   }
 }