P4ADEV-1274 coverage unit test

src/main/java/it/gov/pagopa/payhub/auth/service/a2a/ClientCredentialServiceImpl.java

@@ -16,7 +16,8 @@ public ClientCredentialServiceImpl(ValidateClientCredentialsService validateClie
 
 	@Override
 	public AccessToken postToken(String clientId, String grantType, String scope, String clientSecret) {
+		log.info("Client {} requested authentication with grant type {} and scope {}", clientId, grantType, scope);
 		validateClientCredentialsService.validate(clientId, grantType, scope, clientSecret);
-		return new AccessToken("fakeToken", "bearer", 7);
+		return AccessToken.builder().accessToken("accessToken").build();
 	}
 }

src/test/java/it/gov/pagopa/payhub/auth/service/a2a/ClientCredentialsServiceTest.java

@@ -0,0 +1,40 @@
+package it.gov.pagopa.payhub.auth.service.a2a;
+
+import it.gov.pagopa.payhub.model.generated.AccessToken;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+class ClientCredentialsServiceTest {
+
+	@Mock
+	private ValidateClientCredentialsService validateClientCredentialsServiceMock;
+	private ClientCredentialService service;
+
+	@BeforeEach
+	void init() {
+		service = new ClientCredentialServiceImpl(validateClientCredentialsServiceMock);
+	}
+
+	@Test
+	void givenValidTokenWhenPostTokenThenSuccess(){
+		// Given
+		String clientId="CLIENT_ID";
+		String grantType="GRANT_TYPE";;
+		String scope="SCOPE";
+		String clientSecret="CLIENT_SECRET";
+
+		Mockito.doNothing().when(validateClientCredentialsServiceMock).validate(clientId, grantType, scope, clientSecret);
+		AccessToken expectedAccessToken = AccessToken.builder().accessToken("accessToken").build();
+		//When
+		AccessToken result = service.postToken(clientId, grantType, scope, clientSecret);
+		//Then
+		Assertions.assertEquals(expectedAccessToken, result);
+	}
+
+}