Add JUnit tests

src/test/java/duke/storage/StorageTest.java

@@ -0,0 +1,28 @@
+package duke.storage;
+
+import duke.task.Task;
+import duke.task.ToDo;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class StorageTest {
+    Storage storage = new Storage();
+
+    @Test
+    public void deserializeTask_todo_success() {
+        String input = "T | 0 | Run 5 km";
+        Task output = storage.deserializeTask(input);
+
+        assertEquals(output.getDescription(), "Run 5 km");
+        assertEquals(output.getIsDone(), false);
+    }
+
+    @Test
+    public void serializeTask_todo_success() {
+        ToDo input = new ToDo("Write journal", true);
+        String output = storage.serializeTask(input);
+
+        assertEquals(output, "T | 1 | Write journal\n");
+    }
+}
+

src/test/java/duke/task/TaskTest.java

@@ -0,0 +1,25 @@
+package duke.task;
+
+import duke.task.Task;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TaskTest {
+    Task task = new Task("Run 10 km", false);
+
+    @Test
+    public void getIsDone() {
+        assertEquals(false, task.getIsDone());
+    }
+
+    @Test
+    public void getDescription() {
+        assertEquals("Run 10 km", task.getDescription());
+    }
+
+    @Test
+    public void taskToString() {
+        assertEquals(String.format("[%s] %s", "\u2718", "Run 10 km"), task.toString());
+    }
+}