Add nested integer test coverage in testFromJson

Author: FarhanAnjum-opti

core-api/src/test/java/com/optimizely/ab/config/parser/GsonConfigParserTest.java

@@ -404,13 +404,18 @@ public void testToJson() {
 
     @Test
     public void testFromJson() {
-        String json = "{\"k1\":\"v1\",\"k2\":3.5,\"k3\":true,\"k4\":12345}";
+        String json = "{\"k1\":\"v1\",\"k2\":3.5,\"k3\":true,\"k4\":12345,\"k5\":{\"nk1\":99,\"nk2\":1.5}}";
+
+        Map<String, Object> nestedMap = new HashMap<>();
+        nestedMap.put("nk1", 99L);
+        nestedMap.put("nk2", 1.5);
 
         Map<String, Object> expectedMap = new HashMap<>();
         expectedMap.put("k1", "v1");
         expectedMap.put("k2", 3.5);
         expectedMap.put("k3", true);
         expectedMap.put("k4", 12345L);
+        expectedMap.put("k5", nestedMap);
 
         GsonConfigParser parser = new GsonConfigParser();