chore: enable eslint vitest preset for tests

.eslintrc.json

@@ -9,6 +9,10 @@
     {
       "files": "**/*.ts?(x)",
       "extends": "@faergeek/eslint-config/typescript"
+    },
+    {
+      "files": "**/*.spec.ts?(x)",
+      "extends": "@faergeek/eslint-config/vitest"
     }
   ]
 }

package.json

@@ -33,7 +33,7 @@
   "devDependencies": {
     "@commitlint/cli": "^19.0.0",
     "@commitlint/config-conventional": "^19.0.0",
-    "@faergeek/eslint-config": "^6.0.0",
+    "@faergeek/eslint-config": "^6.1.0",
     "@types/node": "^20.11.16",
     "eslint": "^8.56.0",
     "prettier": "^3.2.5",

src/async.spec.ts

@@ -10,7 +10,7 @@ describe('Async', () => {
     });
 
     expectTypeOf(matched).toEqualTypeOf<undefined>();
-    expect(matched).toBe(undefined);
+    expect(matched).toBeUndefined();
   });
 
   it('.Ready', () => {
@@ -84,6 +84,6 @@ describe('Async', () => {
       .toNullable();
 
     expectTypeOf(notAll).toEqualTypeOf<{ 42: number; none: never } | null>();
-    expect(notAll).toBe(null);
+    expect(notAll).toBeNull();
   });
 });

src/maybe.spec.ts

@@ -73,7 +73,7 @@ describe('Maybe', () => {
 
     const noneValue = Maybe.None.toNullable();
     expectTypeOf(noneValue).toEqualTypeOf<null>();
-    expect(noneValue).toBe(null);
+    expect(noneValue).toBeNull();
   });
 
   it('#toOptional', () => {
@@ -83,7 +83,7 @@ describe('Maybe', () => {
 
     const noneValue = Maybe.None.toOptional();
     expectTypeOf(noneValue).toEqualTypeOf<undefined>();
-    expect(noneValue).toBe(undefined);
+    expect(noneValue).toBeUndefined();
   });
 
   it('#assertSome', () => {
@@ -115,6 +115,6 @@ describe('Maybe', () => {
     }).toNullable();
 
     expectTypeOf(notAll).toEqualTypeOf<{ 42: number; none: never } | null>();
-    expect(notAll).toBe(null);
+    expect(notAll).toBeNull();
   });
 });

src/result.spec.ts

@@ -164,6 +164,6 @@ describe('Result', () => {
       .toNullable();
 
     expectTypeOf(notAll).toEqualTypeOf<{ 42: number; none: never } | null>();
-    expect(notAll).toBe(null);
+    expect(notAll).toBeNull();
   });
 });