diff --git a/src/test/java/ch/zhaw/gartenverwaltung/io/JsonGardenPlanTest.java b/src/test/java/ch/zhaw/gartenverwaltung/io/JsonGardenPlanTest.java
new file mode 100644
index 0000000..159cccf
--- /dev/null
+++ b/src/test/java/ch/zhaw/gartenverwaltung/io/JsonGardenPlanTest.java
@@ -0,0 +1,101 @@
+package ch.zhaw.gartenverwaltung.io;
+
+import ch.zhaw.gartenverwaltung.types.Crop;
+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.ParseException;
+import java.text.SimpleDateFormat;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class JsonGardenPlanTest {
+    GardenPlan testDatabase;
+    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");
+
+    @BeforeEach
+    void connectToDb() {
+        testDatabase = new JsonGardenPlan();
+    }
+
+
+    @Test
+    @DisplayName("Check if results are retrieved completely.")
+    void getCropsNotEmpty() {
+        List<Crop> testList;
+        try {
+            testList = testDatabase.getCrops();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+        Assertions.assertEquals(3, testList.size());
+
+        List<Long> plantIds = testList.stream().map(Crop::getPlantId).collect(Collectors.toList());
+        List<Long> expected = Arrays.asList(1l, 1l, 0l);
+        Assertions.assertEquals(expected, plantIds);
+    }
+
+    @Test
+    @DisplayName("Check whether single access works.")
+    void getCropById() {
+        Optional<Crop> testCrop;
+        try {
+            testCrop = testDatabase.getCropById(1);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+        assertTrue(testCrop.isPresent());
+        Assertions.assertEquals(1, testCrop.get().getPlantId());
+    }
+
+
+    @Test
+    @DisplayName("Check for a nonexisting crop.")
+    void getCropByIdMustFail() {
+        Optional<Crop> testCrop;
+        try {
+            testCrop = testDatabase.getCropById(99);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+        Assertions.assertFalse(testCrop.isPresent());
+    }
+
+    @Test
+    @DisplayName("Add new Crop.")
+    void addNewCrop() {
+
+
+        Crop crop = new Crop(2l, LocalDate.parse("22.02.2023", formatter));
+        try {
+            testDatabase.saveCrop(crop);
+            assertTrue(crop.getCropId().isPresent());
+            Optional<Crop> testCrop;
+            try {
+                testCrop = testDatabase.getCropById(crop.getCropId().get());
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+            assertTrue(testCrop.isPresent());
+            Assertions.assertEquals(2l, testCrop.get().getPlantId());
+
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+
+
+    }
+}
+