wip: migrate to bun

test/isBoolean.spec.ts

@@ -0,0 +1,40 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { falsey, args, slice, symbol, realm } from './utils';
+import isBoolean from '../src/isBoolean';
+
+describe('isBoolean', () => {
+    it('should return `true` for booleans', () => {
+        assert.strictEqual(isBoolean(true), true);
+        assert.strictEqual(isBoolean(false), true);
+        assert.strictEqual(isBoolean(Object(true)), true);
+        assert.strictEqual(isBoolean(Object(false)), true);
+    });
+
+    it('should return `false` for non-booleans', () => {
+        const expected = lodashStable.map(falsey, (value) => value === false);
+
+        const actual = lodashStable.map(falsey, (value, index) =>
+            index ? isBoolean(value) : isBoolean(),
+        );
+
+        assert.deepStrictEqual(actual, expected);
+
+        assert.strictEqual(isBoolean(args), false);
+        assert.strictEqual(isBoolean([1, 2, 3]), false);
+        assert.strictEqual(isBoolean(new Date()), false);
+        assert.strictEqual(isBoolean(new Error()), false);
+        assert.strictEqual(isBoolean(slice), false);
+        assert.strictEqual(isBoolean({ a: 1 }), false);
+        assert.strictEqual(isBoolean(1), false);
+        assert.strictEqual(isBoolean(/x/), false);
+        assert.strictEqual(isBoolean('a'), false);
+        assert.strictEqual(isBoolean(symbol), false);
+    });
+
+    it('should work with a boolean from another realm', () => {
+        if (realm.boolean) {
+            assert.strictEqual(isBoolean(realm.boolean), true);
+        }
+    });
+});