Added Junit test cases

src/main/java/com/nisum/offertransactionservice/config/OfferTransactionConfig.java

@@ -6,8 +6,6 @@ import org.springframework.context.annotation.PropertySource;
 import org.springframework.web.client.*;
 
 @Configuration
-@PropertySource("classpath:application.properties")
-
 public class OfferTransactionConfig {
 
     @Bean

src/test/java/com/nisum/offertransactionservice/service/OfferServiceTest.java

@@ -11,8 +11,11 @@ import org.junit.runner.RunWith;
 import org.mockito.*;
 import org.mockito.junit.MockitoJUnitRunner;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.PropertySource;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.TestPropertySource;
 import org.springframework.web.client.RestTemplate;
 
 import java.util.ArrayList;
@@ -20,6 +23,7 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 @RunWith(MockitoJUnitRunner.class)
+@PropertySource("classpath:application-test.yml")
 public class OfferServiceTest {
 
     @Mock
@@ -47,6 +51,7 @@ public class OfferServiceTest {
 
     @Test
     public void serviceTest() {
+        ReflectionTestUtils.setField(springJunitService, "securityKey", "it's a security key");
         OfferTransactionRequest offerTransactionRequest = getOfferTransactionRequest();
         Mockito.when(offerLookupRepo.findAll()).thenReturn(returnOffers());
         Mockito.when(offerConverter.apply(getOfferTransactionRequest())).thenReturn(getPEReq());