created test class "OfferRetrieverTest"

src/test/java/de/rwu/easydrop/service/retriever/OfferRetrieverTest.java

@@ -0,0 +1,85 @@
+package de.rwu.easydrop.service.retriever;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import javax.naming.ConfigurationException;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import de.rwu.easydrop.api.client.AmazonProductDataSource;
+import de.rwu.easydrop.api.client.DataSourceFactory;
+import de.rwu.easydrop.api.client.EbayItemDataSource;
+import de.rwu.easydrop.api.dto.OfferDTO;
+import de.rwu.easydrop.data.connector.OfferPersistenceInterface;
+import de.rwu.easydrop.model.Offer;
+import de.rwu.easydrop.util.Config;
+
+
+
+
+class OfferRetrieverTest {
+
+    @Mock
+    private Config config;
+    @Mock
+    private DataSourceFactory dataSourceFactory;
+    @Mock
+    private AmazonProductDataSource amazonDataSource;
+    @Mock
+    private EbayItemDataSource ebayDataSource;
+    @Mock
+    private OfferDTO offerDTO;
+    @Mock
+    private Offer offer;
+    @Mock
+    private OfferPersistenceInterface persistence;
+
+    private OfferRetriever offerRetriever;
+
+    @BeforeEach
+    void setUp() throws ConfigurationException {
+        MockitoAnnotations.openMocks(this);
+        when(config.getProperty("AMAZON_API_URL")).thenReturn("https://api.amazon.com");
+        when(config.getProperty("AMAZON_API_KEY")).thenReturn("amazon-api-key");
+        dataSourceFactory.setConfig(config);
+        offerRetriever = new OfferRetriever(persistence);
+    }
+
+    @Test
+    void getOfferFromPersistence(){
+        //Arrange
+        String offerId = "187";
+        String lastUpdate = "2023-01-01";
+        when(persistence.getOfferDTOById(offerId)).thenReturn(offerDTO);
+        when(offerDTO.getOfferId()).thenReturn(offerId);
+        when(offerDTO.getLastUpdate()).thenReturn(lastUpdate);
+
+        //Act
+        Offer result = offerRetriever.getOfferFromPersistence(offerId);
+
+        //Assert
+        assertEquals(offerId, result.getOfferId());
+        assertEquals(lastUpdate, result.getLastUpdate());
+
+        //Verify
+        verify(persistence, times(1)).getOfferDTOById(offerId);
+
+    }
+
+
+
+
+
+
+
+
+
+
+
+}