Merge branch 'additionalTest' into 'develop'

adding test to ensure that id in additional service cannot have negative id value

See merge request !17

src/test/java/no/ntnu/queryeng/entity/AdditionalServiceTest.java

@@ -4,7 +4,7 @@ import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
 
 /**
  * Class for unit testing of Additional Service
@@ -16,6 +16,7 @@ public class AdditionalServiceTest {
 
     AdditionalService addSer = new AdditionalService("change address", "additional service for changing the address", 10.0);
 
+    // ======================= POSITIVE TESTS ==============================
 
     /**
      * Tests that name of the additional service is correct - positive test.
@@ -45,6 +46,17 @@ public class AdditionalServiceTest {
         assertEquals(10.0, addSer.getCost());
     }
 
+    // ======================= NEGATIVE TESTS ==============================
+
+    /**
+     * Testing that negative id values in test fail - negative test.
+     */
+    @Test
+    @DisplayName("checking that negative id fails - negative test")
+    void additionalServiceIdIsIncorrectTest() {
+        addSer.setId(-1);
+        assertTrue(addSer.getId() != -1);
+    }