test(neon): test useragent

Signed-off-by: Nikolas Rimikis <rimikis.nikolas@gmail.com>

packages/neon/neon/test/useragent_test.dart

@@ -0,0 +1,17 @@
+import 'package:neon/src/utils/user_agent.dart';
+import 'package:package_info_plus/package_info_plus.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('UserAgent', () {
+    final packageInfo = PackageInfo(
+      appName: 'appName',
+      packageName: 'packageName',
+      version: 'version',
+      buildNumber: 'buildNumber',
+    );
+    buildUserAgent(packageInfo);
+
+    expect(neonUserAgent, 'Neon version+buildNumber');
+  });
+}