first tests and a typo corrected

src/main/resources/ch/zhaw/gartenverwaltung/io/plantdb.json

@@ -165,7 +165,7 @@
   },
   {
     "id": 2,
-    "name": "summertime onion",
+    "name": "Summertime Onion",
     "description": "Onion, (Allium cepa), herbaceous biennial plant in the amaryllis family (Amaryllidaceae) grown for its edible bulb. The onion is likely native to southwestern Asia but is now grown throughout the world, chiefly in the temperate zones. Onions are low in nutrients but are valued for their flavour and are used widely in cooking. They add flavour to such dishes as stews, roasts, soups, and salads and are also served as a cooked vegetable.",
     "lifecycle": [
       {

src/test/java/ch/zhaw/gartenverwaltung/io/JsonPlantDatabaseTest.java

@@ -0,0 +1,79 @@
+package ch.zhaw.gartenverwaltung.io;
+
+import ch.zhaw.gartenverwaltung.types.HardinessZone;
+import ch.zhaw.gartenverwaltung.types.Plant;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+public class JsonPlantDatabaseTest {
+    PlantDatabase testDatabase;
+    SimpleDateFormat formatter = new SimpleDateFormat("dd.MM.yyyy");
+
+    @BeforeEach
+    void connectToDb() {
+        testDatabase = new JsonPlantDatabase();
+    }
+
+
+    @Test
+    @DisplayName("Check if results are retrieved completely")
+    void getPlantList() {
+        List<Plant> testList;
+        try {
+            testList = testDatabase.getPlantList(HardinessZone.ZONE_8A);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        } catch (HardinessZoneNotSetException e) {
+            throw new RuntimeException(e);
+        }
+        Assertions.assertEquals(3, testList.size());
+
+        List<String> names = testList.stream().map(Plant::name).collect(Collectors.toList());
+        List<String> expected = Arrays.asList("Potato","Early Carrot","Summertime Onion");
+        Assertions.assertEquals(expected,names);
+    }
+
+    @Test
+    @DisplayName("Check whether single access works.")
+    void getPlantById() {
+        Optional<Plant> testPlant;
+        try {
+            testDatabase.getPlantList(HardinessZone.ZONE_8A);
+            testPlant = testDatabase.getPlantById(1);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        } catch (HardinessZoneNotSetException e) {
+            throw new RuntimeException(e);
+        }
+        Assertions.assertTrue(testPlant.isPresent());
+        Assertions.assertEquals("Early Carrot", testPlant.get().name());
+    }
+
+    @Test
+    @DisplayName("Check for a nonexisting plant.")
+    void getPlantByIdMustFail() {
+        Optional<Plant> testPlant;
+        try {
+            testDatabase.getPlantList(HardinessZone.ZONE_8A);
+            testPlant = testDatabase.getPlantById(99);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        } catch (HardinessZoneNotSetException e) {
+            throw new RuntimeException(e);
+        }
+        Assertions.assertFalse(testPlant.isPresent());
+
+
+    }
+
+}
+