wip: migrate to bun

test/isElement.spec.ts

@@ -0,0 +1,57 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { document, body, falsey, stubFalse, args, slice, symbol, realm } from './utils';
+import isElement from '../src/isElement';
+
+describe('isElement', () => {
+    it('should return `true` for elements', () => {
+        if (document) {
+            assert.strictEqual(isElement(body), true);
+        }
+    });
+
+    it('should return `true` for non-plain objects', () => {
+        function Foo() {
+            this.nodeType = 1;
+        }
+
+        assert.strictEqual(isElement(new Foo()), true);
+    });
+
+    it('should return `false` for non DOM elements', () => {
+        const expected = lodashStable.map(falsey, stubFalse);
+
+        const actual = lodashStable.map(falsey, (value, index) =>
+            index ? isElement(value) : isElement(),
+        );
+
+        assert.deepStrictEqual(actual, expected);
+
+        assert.strictEqual(isElement(args), false);
+        assert.strictEqual(isElement([1, 2, 3]), false);
+        assert.strictEqual(isElement(true), false);
+        assert.strictEqual(isElement(new Date()), false);
+        assert.strictEqual(isElement(new Error()), false);
+        assert.strictEqual(isElement(slice), false);
+        assert.strictEqual(isElement({ a: 1 }), false);
+        assert.strictEqual(isElement(1), false);
+        assert.strictEqual(isElement(/x/), false);
+        assert.strictEqual(isElement('a'), false);
+        assert.strictEqual(isElement(symbol), false);
+    });
+
+    it('should return `false` for plain objects', () => {
+        assert.strictEqual(isElement({ nodeType: 1 }), false);
+        assert.strictEqual(isElement({ nodeType: Object(1) }), false);
+        assert.strictEqual(isElement({ nodeType: true }), false);
+        assert.strictEqual(isElement({ nodeType: [1] }), false);
+        assert.strictEqual(isElement({ nodeType: '1' }), false);
+        assert.strictEqual(isElement({ nodeType: '001' }), false);
+    });
+
+    it('should work with a DOM element from another realm', () => {
+        if (realm.element) {
+            assert.strictEqual(isElement(realm.element), true);
+        }
+    });
+});