fix: allow empty keys assertion when target object is empty

lib/chai/core/assertions.js

@@ -2524,7 +2524,8 @@ function assertKeys(keys) {
     });
   }
 
-  if (!keys.length) {
+  // Fix for PR #1384: Allow empty keys if the actual object is also empty
+  if (!keys.length && actual.length) {
     throw new AssertionError(flagMsg + 'keys required', undefined, ssfi);
   }
 

test/issue-1384.js

@@ -0,0 +1,15 @@
+import {expect} from '../index.js';
+
+describe('Fix #1384: Empty keys support', function () {
+  it('should accept empty keys when the object is empty', function () {
+    // Yeh test pehle fail hota tha, ab pass hona chahiye
+    expect({}).to.have.all.keys([]);
+  });
+
+  it('should still throw error if object has properties but keys are empty', function () {
+    // Yeh ensure karega ki humne validation poora disable nahi kiya
+    expect(function () {
+      expect({a: 1}).to.have.all.keys([]);
+    }).to.throw('keys required');
+  });
+});