#39 Added some tests

src/test/java/de/rwu/easydrop/api/AmazonProductDataSourceTest.java

@@ -0,0 +1,64 @@
+package de.rwu.easydrop.api;
+
+import java.lang.reflect.Field;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.MockitoAnnotations;
+
+import de.rwu.easydrop.api.client.AmazonProductDataSource;
+
+public class AmazonProductDataSourceTest {
+
+    private AmazonProductDataSource dataSource;
+
+    @BeforeEach
+    public void setup() {
+        dataSource = new AmazonProductDataSource(
+                "https://www.example.com/api",
+                "my-api-key");
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    public void testConstructor() {
+        // Arrange
+        String baseUrl = "https://www.example.com/api";
+        String apiKey = "my-api-key";
+
+        // Assert
+        try {
+            Field baseUrlField = AmazonProductDataSource.class.getDeclaredField("baseUrl");
+            baseUrlField.setAccessible(true);
+            Assertions.assertEquals(baseUrl, baseUrlField.get(dataSource));
+
+            Field apiKeyField = AmazonProductDataSource.class.getDeclaredField("apiKey");
+            apiKeyField.setAccessible(true);
+            Assertions.assertEquals(apiKey, apiKeyField.get(dataSource));
+        } catch (NoSuchFieldException e) {
+            Assertions.fail();
+        } catch (IllegalAccessException e) {
+            Assertions.fail();
+        }
+    }
+
+    @Test
+    public void testCreateApiUrl() throws MalformedURLException {
+        // Test case 1
+        String productId1 = "12345";
+        URL expectedUrl1 = new URL(
+                "https://www.example.com/api/products/2020-08-26/products/12345/offers?productRegion=DE&locale=de_DE");
+        URL createdUrl1 = dataSource.createApiUrl(productId1);
+        Assertions.assertEquals(expectedUrl1, createdUrl1);
+
+        // Test case 2
+        String productId2 = "67890";
+        URL expectedUrl2 = new URL(
+                "https://www.example.com/api/products/2020-08-26/products/67890/offers?productRegion=DE&locale=de_DE");
+        URL createdUrl2 = dataSource.createApiUrl(productId2);
+        Assertions.assertEquals(expectedUrl2, createdUrl2);
+    }
+}