Create headerfield_test.dart

test/widgets/headerfield_test.dart

@@ -0,0 +1,24 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:apidash/widgets/headerfield.dart';
+
+void main() {
+  testWidgets('Testing Header Field', (tester) async {
+    await tester.pumpWidget(
+      const MaterialApp(
+        title: 'Header Field',
+        home: Scaffold(
+          body: Column(children: [
+            HeaderField(
+              keyId: "1",
+              initialValue: "X",
+            )
+          ]),
+        ),
+      ),
+    );
+
+    expect(find.byKey(const Key("1")), findsOneWidget);
+    expect(find.text('X'), findsOneWidget);
+  });
+}