Add junit tests

src/main/java/Duke.java → src/main/java/duke/Duke.java

@@ -1,3 +1,5 @@
+package duke;
+
 import duke.command.Command;
 import duke.command.ExitCommand;
 import duke.exception.DukeException;

src/main/test/java/duke/parser/ParserTest.java

@@ -0,0 +1,27 @@
+package parser;
+
+import duke.command.Command;
+import duke.exception.DukeException;
+import duke.parser.Parser;
+import duke.storage.Storage;
+import duke.task.Task;
+import duke.tasklist.TaskList;
+import duke.ui.Ui;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ParserTest {
+    @Test
+    public void parseTodoTest() throws DukeException {
+        Storage s = new Storage("data/test.txt");
+        TaskList t = new TaskList(s.loadFile());
+        Ui ui = new Ui();
+        Command c = Parser.parse("todo finish CS2103 ip");
+        c.execute(t, ui, s);
+        ArrayList<Task> tasks = t.getAllTasks();
+        assertEquals(tasks.get(tasks.size() - 1).toString(), "[T][] finish CS2103 ip");
+    }
+}

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

@@ -0,0 +1,20 @@
+package storage;
+
+import duke.storage.Storage;
+import org.junit.jupiter.api.Test;
+
+import java.io.FileNotFoundException;
+import java.io.PrintWriter;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class StorageTest {
+
+    @Test
+    public void writeFileTest() throws FileNotFoundException {
+        Storage s = new Storage("data/test.txt");
+        PrintWriter writer = new PrintWriter("data/test.txt");
+        writer.close();
+        assertEquals(s.loadFile().size(), 0);
+    }
+}