test: run messenger on Vitest

oxlint-suppressions.json

@@ -3665,17 +3665,15 @@
       "count": 1
     }
   },
-  "packages/messenger/jest.config.cjs": {
-    "import/unambiguous": {
-      "count": 1
-    }
-  },
   "packages/messenger/src/Messenger.test.ts": {
     "typescript/no-unsafe-member-access": {
       "count": 12
     },
     "typescript/no-unsafe-return": {
       "count": 12
+    },
+    "vitest/no-conditional-in-test": {
+      "count": 3
     }
   },
   "packages/messenger/src/Messenger.ts": {

packages/messenger/package.json

@@ -42,28 +42,21 @@
     "lint:tsconfigs": "node --import ../../scripts/resolver/register.ts --experimental-transform-types ../../scripts/lint-tsconfigs/lint-tsconfigs.ts",
     "lint:tsconfigs:fix": "node --import ../../scripts/resolver/register.ts --experimental-transform-types ../../scripts/lint-tsconfigs/lint-tsconfigs.ts --fix",
     "since-latest-release": "../../scripts/since-latest-release.sh",
-    "test": "yarn test:unit && yarn test:types",
-    "test:clean": "yarn test:unit:clean && yarn test:types",
-    "test:types": "tstyche",
-    "test:unit": "NODE_OPTIONS=--experimental-vm-modules jest --reporters=jest-silent-reporter",
-    "test:unit:clean": "NODE_OPTIONS=--experimental-vm-modules jest --clearCache",
-    "test:unit:verbose": "NODE_OPTIONS=--experimental-vm-modules jest --verbose",
-    "test:verbose": "yarn test:unit:verbose && yarn test:types",
-    "test:watch": "NODE_OPTIONS=--experimental-vm-modules jest --watch"
+    "test": "vitest",
+    "test:clean": "vitest --clearCache",
+    "test:verbose": "vitest --reporter=verbose",
+    "test:watch": "vitest --watch"
   },
   "devDependencies": {
     "@metamask/auto-changelog": "^6.2.1",
     "@types/jest": "^30.0.0",
     "@typescript/native": "npm:typescript@^7.0.2",
-    "deepmerge": "^4.3.1",
     "immer": "^11.1.18",
-    "jest": "^30.5.2",
     "rimraf": "^6.1.3",
-    "ts-jest": "^29.4.14",
-    "tstyche": "^7.2.5",
     "typedoc": "^0.28.20",
     "typedoc-plugin-missing-exports": "^4.1.4",
-    "typescript": "npm:@typescript/typescript6@^6.0.2"
+    "typescript": "npm:@typescript/typescript6@^6.0.2",
+    "vitest": "^5.0.0"
   },
   "peerDependencies": {
     "typescript": ">=5.0.0"

packages/messenger/src/Messenger.tst.ts → packages/messenger/src/Messenger.test-d.ts

@@ -1,4 +1,4 @@
-import { describe, expect, test } from 'tstyche';
+import { describe, test } from 'vitest';
 
 import { Messenger } from './Messenger.js';
 
@@ -28,13 +28,13 @@ describe('Messenger', () => {
         EventA | EventB
       >({ namespace: 'Child' });
 
-      expect(
-        source.delegateAll({
-          messenger: child,
-          actions: ['A:getValue', 'B:getName'],
-          events: ['A:stateChange', 'B:nameChange'],
-        }),
-      ).type.not.toRaiseError();
+      // We purposely make no assertions here;
+      // this test file will fail if there are type errors.
+      source.delegateAll({
+        messenger: child,
+        actions: ['A:getValue', 'B:getName'],
+        events: ['A:stateChange', 'B:nameChange'],
+      });
     });
 
     test('excludes the delegatee own-namespace actions from the exhaustiveness check', () => {
@@ -45,13 +45,13 @@ describe('Messenger', () => {
         namespace: 'Child',
       });
 
-      expect(
-        source.delegateAll({
-          messenger: child,
-          actions: ['A:getValue'],
-          events: [],
-        }),
-      ).type.not.toRaiseError();
+      // We purposely make no assertions here;
+      // this test file will fail if there are type errors.
+      source.delegateAll({
+        messenger: child,
+        actions: ['A:getValue'],
+        events: [],
+      });
     });
 
     test('raises a type error when an external action is missing', () => {
@@ -62,13 +62,12 @@ describe('Messenger', () => {
         namespace: 'Child',
       });
 
-      expect(
-        source.delegateAll({
-          messenger: child,
-          actions: ['A:getValue'],
-          events: [],
-        }),
-      ).type.toRaiseError();
+      source.delegateAll({
+        messenger: child,
+        // @ts-expect-error The external action `B:getName` is missing.
+        actions: ['A:getValue'],
+        events: [],
+      });
     });
 
     test('raises a type error when an external event is missing', () => {
@@ -79,13 +78,12 @@ describe('Messenger', () => {
         namespace: 'Child',
       });
 
-      expect(
-        source.delegateAll({
-          messenger: child,
-          actions: [],
-          events: ['A:stateChange'],
-        }),
-      ).type.toRaiseError();
+      source.delegateAll({
+        messenger: child,
+        actions: [],
+        // @ts-expect-error The external event `B:nameChange` is missing.
+        events: ['A:stateChange'],
+      });
     });
 
     test('raises a type error when the source cannot provide a required external action', () => {
@@ -96,13 +94,12 @@ describe('Messenger', () => {
         namespace: 'Child',
       });
 
-      expect(
-        source.delegateAll({
-          messenger: child,
-          actions: ['A:getValue'],
-          events: [],
-        }),
-      ).type.toRaiseError();
+      source.delegateAll({
+        messenger: child,
+        // @ts-expect-error The source cannot provide `B:getName`.
+        actions: ['A:getValue'],
+        events: [],
+      });
     });
   });
 });