diff --git a/src/test/java/pta/de/core/common/util/JsonGeneratorBaseTest.java b/src/test/java/pta/de/core/common/util/JsonGeneratorBaseTest.java
new file mode 100644
index 0000000..e678739
--- /dev/null
+++ b/src/test/java/pta/de/core/common/util/JsonGeneratorBaseTest.java
@@ -0,0 +1,61 @@
+package pta.de.core.common.util;
+
+import org.junit.Test;
+import pta.de.core.common.JsonGeneratorBase;
+
+import java.util.Date;
+
+import static org.junit.Assert.assertEquals;
+
+public class JsonGeneratorBaseTest extends ResourceLoaderBase {
+    public static class TestPojo {
+        private String name;
+        private int number;
+        private Date date;
+
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        public int getNumber() {
+            return number;
+        }
+
+        public void setNumber(int number) {
+            this.number = number;
+        }
+
+        public Date getDate() {
+            return date;
+        }
+
+        public void setDate(Date date) {
+            this.date = date;
+        }
+
+    }
+
+    @Test
+    public void testInputOutput() {
+        Date now = new Date(System.currentTimeMillis());
+        TestPojo pojo = new TestPojo();
+        pojo.setDate(now);
+        pojo.setName("Haferkamp");
+        pojo.setNumber(6758);
+
+        String jsonString = JsonGeneratorBase.getGson().toJson(pojo);
+
+        TestPojo pojoIncoming = JsonGeneratorBase.getGson().fromJson(jsonString, TestPojo.class);
+
+        assertEquals(pojo.getDate(), pojoIncoming.getDate());
+        assertEquals(pojo.getName(), pojoIncoming.getName());
+        assertEquals(pojo.getNumber(), pojoIncoming.getNumber());
+    }
+
+
+}
diff --git a/src/test/java/pta/de/core/controller/ServicesConfigCacheTest.java b/src/test/java/pta/de/core/controller/ServicesConfigCacheTest.java
index 3416583..95ae466 100644
--- a/src/test/java/pta/de/core/controller/ServicesConfigCacheTest.java
+++ b/src/test/java/pta/de/core/controller/ServicesConfigCacheTest.java
@@ -17,13 +17,7 @@
         String json = resourceLoaderBase.loadStringFromResource(jsonFile);
 
         ServicesConfigCache scc = ServicesConfigCache.getInstance();
-
-
-
-        ServiceDistributionCluster[] sdc = (ServiceDistributionCluster[])
-                Whitebox.invokeMethod(scc,"readServerDistributionFromText", json);
-
-        return sdc;
+        return Whitebox.invokeMethod(scc, "readServerDistributionFromText", json);
     }
 
     @Test
@@ -45,4 +39,23 @@
         }
     }
 
+    @Test
+    public void testReadServerDistribution_FileNotExist() throws Exception {
+        try {
+            baseTestReadServerDistribution("Nowhere.json");
+        } catch (HttpStatusException e) {
+            assertEquals(e.getHttpStatus(), HttpStatus.INTERNAL_SERVER_ERROR_500);
+        }
+    }
+
+    @Test
+    public void testReadServerDistribution_FileNotExistEither() throws Exception {
+        try {
+            ServicesConfigCache.getInstance().readServerDistribution("Nowhere.json");
+        } catch (HttpStatusException e) {
+            assertEquals(HttpStatus.INTERNAL_SERVER_ERROR_500, e.getHttpStatus());
+        }
+    }
+
+
 }