wip: migrate to bun

test/isNil.spec.ts

@@ -0,0 +1,42 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { falsey, args, slice, symbol, realm } from './utils';
+import isNil from '../src/isNil';
+
+describe('isNil', () => {
+    it('should return `true` for nullish values', () => {
+        assert.strictEqual(isNil(null), true);
+        assert.strictEqual(isNil(), true);
+        assert.strictEqual(isNil(undefined), true);
+    });
+
+    it('should return `false` for non-nullish values', () => {
+        const expected = lodashStable.map(falsey, (value) => value == null);
+
+        const actual = lodashStable.map(falsey, (value, index) => (index ? isNil(value) : isNil()));
+
+        assert.deepStrictEqual(actual, expected);
+
+        assert.strictEqual(isNil(args), false);
+        assert.strictEqual(isNil([1, 2, 3]), false);
+        assert.strictEqual(isNil(true), false);
+        assert.strictEqual(isNil(new Date()), false);
+        assert.strictEqual(isNil(new Error()), false);
+        assert.strictEqual(isNil(slice), false);
+        assert.strictEqual(isNil({ a: 1 }), false);
+        assert.strictEqual(isNil(1), false);
+        assert.strictEqual(isNil(/x/), false);
+        assert.strictEqual(isNil('a'), false);
+
+        if (Symbol) {
+            assert.strictEqual(isNil(symbol), false);
+        }
+    });
+
+    it('should work with nils from another realm', () => {
+        if (realm.object) {
+            assert.strictEqual(isNil(realm.null), true);
+            assert.strictEqual(isNil(realm.undefined), true);
+        }
+    });
+});