Added Jacoco Code Coverage For Sonar.

src/main/java/com/example/service/AzureAppConfigService.java

@@ -47,6 +47,8 @@ public class AzureAppConfigService {
     public String writeValueByKey(String key, String value) {
         try {
             LOGGER.info("Writing Single Value by key");
+            if(key == null || value == null)
+                throw new Exception("Key and Value cannot be null");
             ConfigurationSetting configurationSetting = configurationClient.setConfigurationSetting(key, null, value);
             return configurationSetting.getValue();
         } catch (Exception e) {
@@ -61,12 +63,7 @@ public class AzureAppConfigService {
      */
     public PagedIterable<ConfigurationSetting> readAllKeyValue() {
         LOGGER.info("Read All Values...");
-        try {
-            return configurationClient.listConfigurationSettings(settingSelector);
-        } catch (Exception e) {
-            LOGGER.error(e.getMessage());
-            return null;
-        }
+        return configurationClient.listConfigurationSettings(settingSelector);
     }
 
     /**

src/test/java/com/example/service/AzureAppConfigServiceTest.java

@@ -11,8 +11,7 @@ import org.junit.jupiter.api.TestMethodOrder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.*;
 
 @TestMethodOrder(OrderAnnotation.class)
 class AzureAppConfigServiceTest {
@@ -40,6 +39,12 @@ class AzureAppConfigServiceTest {
         assertEquals(EXISTING_VALUE, valueByKey);
     }
 
+    @Test
+    @Order(5)
+    void getValueByKeyException() {
+        assertNull(azureAppConfigService.getValueByKey(null));
+    }
+
     @Test
     @Order(2)
     void writeValueByKey() {
@@ -49,6 +54,12 @@ class AzureAppConfigServiceTest {
         assertEquals(NEW_VALUE, writeValueByKey);
     }
 
+    @Test
+    @Order(6)
+    void writeValueByKeyException() {
+        assertNull(azureAppConfigService.writeValueByKey(null, null));
+    }
+
     @Test
     @Order(4)
     void readAllKeyValue() {
@@ -64,4 +75,10 @@ class AzureAppConfigServiceTest {
         assertNotNull(valueByKey);
         assertEquals(NEW_VALUE, valueByKey);
     }
+
+    @Test
+    @Order(7)
+    void deleteValueByKeyException() {
+        assertNull(azureAppConfigService.deleteValueByKey(null));
+    }
 }
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