chore(flutter): add SDK initialization test

Author: abhaysood

flutter/measure_flutter/lib/measure.dart

@@ -1,5 +1,6 @@
 import 'dart:developer' as developer;
 
+import 'package:flutter/cupertino.dart';
 import 'package:measure_flutter/attribute_value.dart';
 import 'package:measure_flutter/src/config/measure_config.dart';
 import 'package:measure_flutter/src/logger/log_level.dart';
@@ -15,6 +16,9 @@ class Measure implements IMeasure {
   late MeasureInternal _measure;
   bool _isInitialized = false;
 
+  @visibleForTesting
+  bool get isInitialized => _isInitialized;
+
   @override
   Future<void> init({
     bool enableLogging = false,

flutter/measure_flutter/test/measure_test.dart

@@ -0,0 +1,17 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:measure_flutter/measure.dart';
+
+void main() {
+  group('Measure initialization', () {
+    test('should initialize successfully', () async {
+      // Given
+      final measure = Measure.instance;
+
+      // When
+      await measure.init(enableLogging: true);
+
+      // Then
+      expect(measure.isInitialized, true);
+    });
+  });
+}