Add JUnit tests to test behaviour of ToDo, Deadline, Event, Parser class

src/main/java/AddCommand.java

@@ -1,4 +1,3 @@
-import java.io.IOException;
 import java.time.format.DateTimeFormatter;
 
 public class AddCommand extends Command {

src/main/java/Duke.java

@@ -1,5 +1,3 @@
-import java.io.IOException;
-
 public class Duke {
 
     private Ui ui;

src/test/java/DeadlineTest.java

@@ -0,0 +1,37 @@
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class DeadlineTest {
+    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
+    LocalDateTime atLocalDate = LocalDateTime.parse("2020-12-12 12:30", formatter);
+
+    @Test
+    public void markAsDone_success() {
+        Deadline task = new Deadline("proj meeting", atLocalDate);
+        assertEquals("\u2718", task.getStatusIcon());
+        task = task.markAsDone();
+        assertEquals("\u2713", task.getStatusIcon());
+    }
+
+    @Test
+    public void toString_success() {
+        Deadline task = new Deadline("proj meeting", atLocalDate);
+        assertEquals("[D][" + "\u2718" + "] " + "proj meeting (by: Dec 12 2020 12:30 PM)", task.toString());
+
+        Deadline doneTask = new Deadline("proj meeting", atLocalDate, true);
+        assertEquals("[D][" + "\u2713" + "] " + "proj meeting (by: Dec 12 2020 12:30 PM)", doneTask.toString());
+    }
+
+    @Test
+    public void toTxtFileformat_success() {
+        Deadline task = new Deadline("proj meeting", atLocalDate);
+        assertEquals("D | 0 | proj meeting | 2020-12-12 12:30", task.toTxtFileFormat());
+
+        Deadline doneTask = new Deadline("proj meeting", atLocalDate, true);
+        assertEquals("D | 1 | proj meeting | 2020-12-12 12:30", doneTask.toTxtFileFormat());
+    }
+}

src/test/java/EventTest.java

@@ -0,0 +1,40 @@
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class EventTest {
+    @Test
+    public void markAsDone_success() {
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
+        LocalDateTime byLocalDate = LocalDateTime.parse("2020-12-12 12:30", formatter);
+        Event task = new Event("proj meeting", byLocalDate);
+        assertEquals("\u2718", task.getStatusIcon());
+        task = task.markAsDone();
+        assertEquals("\u2713", task.getStatusIcon());
+    }
+
+    @Test
+    public void toString_success() {
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
+        LocalDateTime byLocalDate = LocalDateTime.parse("2020-12-12 12:30", formatter);
+        Event task = new Event("proj meeting", byLocalDate);
+        assertEquals("[E][" + "\u2718" + "] " + "proj meeting (at: Dec 12 2020 12:30 PM)", task.toString());
+
+        Event doneTask = new Event("proj meeting", byLocalDate, true);
+        assertEquals("[E][" + "\u2713" + "] " + "proj meeting (at: Dec 12 2020 12:30 PM)", doneTask.toString());
+    }
+
+    @Test
+    public void toTxtFileformat_success() {
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
+        LocalDateTime byLocalDate = LocalDateTime.parse("2020-12-12 12:30", formatter);
+        Event task = new Event("proj meeting", byLocalDate);
+        assertEquals("E | 0 | proj meeting | 2020-12-12 12:30", task.toTxtFileFormat());
+
+        Event doneTask = new Event("proj meeting", byLocalDate, true);
+        assertEquals("E | 1 | proj meeting | 2020-12-12 12:30", doneTask.toTxtFileFormat());
+    }
+}

src/test/java/ParserTest.java

@@ -0,0 +1,64 @@
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ParserTest {
+    @Test
+    public void isInteger_stringInteger_success() {
+        assertEquals(true, Parser.isInteger("2"));
+    }
+
+    @Test
+    public void isValidFormat_stringInputDate_valid() {
+        assertEquals(true, Parser.isValidFormat("2020-10-10 12:30"));
+    }
+
+    @Test
+    public void isValidFormat_stringInputDate_invalid() {
+        assertEquals(false, Parser.isValidFormat("10th august"));
+
+    }
+
+    @Test
+    public void parse_oneWordCommand_success() throws DukeException {
+        assertEquals(true, Parser.parse("list") instanceof ListCommand);
+        assertEquals(true, Parser.parse("bye") instanceof ExitCommand);
+    }
+
+    @Test
+    public void parse_doneCommand_success() throws DukeException {
+        assertEquals(true, Parser.parse("done 1") instanceof DoneCommand);
+        assertEquals(true, Parser.parse("done 3") instanceof DoneCommand);
+    }
+
+    @Test
+    public void parse_InvalidDoneCommand_exceptionThrown() {
+        try {
+            assertEquals(true, Parser.parse("done 0") instanceof DoneCommand);
+        } catch (DukeException e) {
+            assertEquals("Please enter a valid task number.", e.getMessage());
+        }
+    }
+
+    @Test
+    public void parse_deleteCommand_success() throws DukeException {
+        assertEquals(true, Parser.parse("delete 1") instanceof DeleteCommand);
+        assertEquals(true, Parser.parse("delete 3") instanceof DeleteCommand);
+    }
+
+    @Test
+    public void parse_addCommand_success() throws DukeException {
+        assertEquals(true, Parser.parse("todo study") instanceof AddCommand);
+        assertEquals(true, Parser.parse("deadline work /by 2020-12-12 12:30") instanceof AddCommand);
+        assertEquals(true, Parser.parse("event proj /at 2020-12-12 12:30") instanceof AddCommand);
+    }
+
+    @Test
+    public void parse_invalidCommands_exceptionThrown() {
+        try {
+            assertEquals(true, Parser.parse("abcd") instanceof Command);
+        } catch (DukeException e) {
+            assertEquals("☹ ERROR: Invalid command provided. Please try again.", e.getMessage());
+        }
+    }
+}

src/test/java/TaskListTest.java

@@ -0,0 +1,21 @@
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TaskListTest {
+
+    @Test
+    public void doneTask_intTaskNumber_success() {
+        List<Task> tmp = new ArrayList<>();
+        ToDo task = new ToDo("testing");
+        tmp.add(task);
+        TaskList tasks = new TaskList(tmp);
+
+        assertEquals(false, tasks.getTask(1).isDone);
+        tasks.doneTask(1);
+        assertEquals(true, tasks.getTask(1).isDone);
+    }
+}

src/test/java/ToDoTest.java

@@ -0,0 +1,32 @@
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ToDoTest {
+    @Test
+    public void markAsDone_success() {
+        ToDo task = new ToDo("testing");
+        assertEquals("\u2718", task.getStatusIcon());
+        task = task.markAsDone();
+        assertEquals("\u2713", task.getStatusIcon());
+    }
+
+    @Test
+    public void toString_success() {
+        ToDo task = new ToDo("study at home");
+        assertEquals("[T][" + "\u2718" + "] " + "study at home", task.toString());
+
+        ToDo doneTask = new ToDo("study at home", true);
+        assertEquals("[T][" + "\u2713" + "] " + "study at home", doneTask.toString());
+    }
+
+    @Test
+    public void toTxtFileformat_success() {
+        ToDo task = new ToDo("study at home");
+        assertEquals("T | 0 | study at home", task.toTxtFileFormat());
+
+        ToDo doneTask = new ToDo("study at home", true);
+        assertEquals("T | 1 | study at home", doneTask.toTxtFileFormat());
+    }
+
+}