wip: migrate to bun

test/isNull.spec.ts

@@ -0,0 +1,38 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { falsey, args, slice, symbol, realm } from './utils';
+import isNull from '../src/isNull';
+
+describe('isNull', () => {
+    it('should return `true` for `null` values', () => {
+        assert.strictEqual(isNull(null), true);
+    });
+
+    it('should return `false` for non `null` values', () => {
+        const expected = lodashStable.map(falsey, (value) => value === null);
+
+        const actual = lodashStable.map(falsey, (value, index) =>
+            index ? isNull(value) : isNull(),
+        );
+
+        assert.deepStrictEqual(actual, expected);
+
+        assert.strictEqual(isNull(args), false);
+        assert.strictEqual(isNull([1, 2, 3]), false);
+        assert.strictEqual(isNull(true), false);
+        assert.strictEqual(isNull(new Date()), false);
+        assert.strictEqual(isNull(new Error()), false);
+        assert.strictEqual(isNull(slice), false);
+        assert.strictEqual(isNull({ a: 1 }), false);
+        assert.strictEqual(isNull(1), false);
+        assert.strictEqual(isNull(/x/), false);
+        assert.strictEqual(isNull('a'), false);
+        assert.strictEqual(isNull(symbol), false);
+    });
+
+    it('should work with nulls from another realm', () => {
+        if (realm.object) {
+            assert.strictEqual(isNull(realm.null), true);
+        }
+    });
+});