wip: migrate to bun

test/isWeakSet.spec.ts

@@ -0,0 +1,41 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { weakSet, falsey, stubFalse, args, slice, set, symbol, realm } from './utils';
+import isWeakSet from '../src/isWeakSet';
+
+describe('isWeakSet', () => {
+    it('should return `true` for weak sets', () => {
+        if (WeakSet) {
+            assert.strictEqual(isWeakSet(weakSet), true);
+        }
+    });
+
+    it('should return `false` for non weak sets', () => {
+        const expected = lodashStable.map(falsey, stubFalse);
+
+        const actual = lodashStable.map(falsey, (value, index) =>
+            index ? isWeakSet(value) : isWeakSet(),
+        );
+
+        assert.deepStrictEqual(actual, expected);
+
+        assert.strictEqual(isWeakSet(args), false);
+        assert.strictEqual(isWeakSet([1, 2, 3]), false);
+        assert.strictEqual(isWeakSet(true), false);
+        assert.strictEqual(isWeakSet(new Date()), false);
+        assert.strictEqual(isWeakSet(new Error()), false);
+        assert.strictEqual(isWeakSet(slice), false);
+        assert.strictEqual(isWeakSet({ a: 1 }), false);
+        assert.strictEqual(isWeakSet(1), false);
+        assert.strictEqual(isWeakSet(/x/), false);
+        assert.strictEqual(isWeakSet('a'), false);
+        assert.strictEqual(isWeakSet(set), false);
+        assert.strictEqual(isWeakSet(symbol), false);
+    });
+
+    it('should work with weak sets from another realm', () => {
+        if (realm.weakSet) {
+            assert.strictEqual(isWeakSet(realm.weakSet), true);
+        }
+    });
+});