A-JUnit

src/test/java/DeadlineTest.java

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+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class DeadlineTest {
+
+    @Test
+    public void testStringConversion() {
+        assertEquals("[D][not done] return book (by: 12 June 2019 6:00 PM)",
+                new Deadline("return book", false,
+                        LocalDateTime.of(2019, 6, 12, 18, 0)).toString());
+    }
+}

src/test/java/EventTest.java

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+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class EventTest {
+
+    @Test
+    public void testStringConversion() {
+        assertEquals("[E][not done] dance auditions (at: 30 September 2020 11:30 AM)",
+                new Event("dance auditions", false,
+                        LocalDateTime.of(2020, 9, 30, 11, 30)).toString());
+    }
+}

src/test/java/ParserTest.java

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+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ParserTest {
+    @Test
+    public void processMsg_invalidCommand_exceptionThrown() {
+        try {
+            Parser p = new Parser(new TaskList());
+            p.processMsg("test");
+        } catch (Exception e) {
+            assertEquals("Specified action is not recognised.", e.getMessage());
+        }
+    }
+
+    @Test
+    public void processDate_validDate_success() throws DukeException {
+        Parser p = new Parser(new TaskList());
+        LocalDateTime test = p.processDate("5/2/2020 1821");
+        assertEquals(LocalDateTime.of(2020, 2, 5, 18, 21), test);
+    }
+}

src/test/java/TaskTest.java

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+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class TaskTest {
+    @Test
+    public void testStringConversion() {
+        assertEquals("[not done] read book", new Task("read book", false).toString());
+    }
+
+    @Test
+    public void markAsComplete_incompleteTask_success() {
+        Task testTask = new Task("read book", false);
+        testTask.markAsComplete();
+        assertTrue(testTask.getStatus());
+    }
+}

src/test/java/TodoTest.java

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+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TodoTest {
+
+    @Test
+    public void testStringConversion() {
+        assertEquals("[T][not done] read book", new Todo("read book", false).toString());
+    }
+}