Add first test of System.exit

Issue-ID: AAF-996
Signed-off-by: kjaniak <kornel.janiak@nokia.com>
Change-Id: Id0ee4d6a08e7050ef080f0e1fadea8c07459571c

1 files changed, 17 insertions, 3 deletions

diff --git a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CertServiceClientAppTest.java b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CertServiceClientTest.java
index e9d169a0..12c2db06 100644
--- a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CertServiceClientAppTest.java
+++ b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CertServiceClientTest.java
@@ -20,15 +20,29 @@
 package org.onap.aaf.certservice.client;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Spy;
+import org.mockito.junit.jupiter.MockitoExtension;
 
-class CertServiceClientAppTest {
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(MockitoExtension.class)
+class CertServiceClientTest {
+    @Spy
+    CertServiceClient certServiceClient = new CertServiceClient();
 
     //  Sonar check for this test disabled due to lack of assertion in test.
     //  Intention of this test is to check if app runs without exiting Java.
     @Test
-    public void mainShouldSucceed() {   //NOSONAR
+    public void shouldExitWithZero_onApplicationSuccessfulFinish() {   //NOSONAR
+        //  given
         String[] params = {""};
-        CertServiceClientApp.main(params);
+        doNothing().when(certServiceClient).exit(0);
+        //  when
+        certServiceClient.run(params);
+        //  then
+        verify(certServiceClient).exit(0);
     }
 
 }
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