Add skeleton classes for generate interview timetable feature (#50)

* Add skeleton classes for generate interview timetable feature

* Fix errors with continous integration

* Add Unit Tests for Row, Column, and Schedule class

* Fix checkstyle issue

src/main/java/seedu/address/model/Column.java

@@ -0,0 +1,37 @@
+package seedu.address.model;
+
+import java.util.HashSet;
+
+import seedu.address.model.person.Address;
+import seedu.address.model.person.Email;
+import seedu.address.model.person.Name;
+import seedu.address.model.person.Person;
+import seedu.address.model.person.Phone;
+
+/**
+ * Encapsulates a column in the schedule timetable.
+ */
+public class Column {
+
+    public int getSize() {
+        return 0;
+    }
+
+    // Change this to return Interviewee
+    public Person getInterviewer() {
+        return new Person(new Name("John Doe"), new Phone("12345678"), new Email("johndoe@mail.com"),
+            new Address("Singapore"), new HashSet<>());
+    }
+
+    // Change this to return Interivewee instead later
+    public Person getInterviewee(int index) {
+        return new Person(new Name("John Doe"), new Phone("12345678"), new Email("johndoe@mail.com"),
+            new Address("Singapore"), new HashSet<>());
+    }
+
+    // Change this to return Interivewee instead later
+    public Person getInterviewee(String timing) {
+        return new Person(new Name("John Doe"), new Phone("12345678"), new Email("johndoe@mail.com"),
+            new Address("Singapore"), new HashSet<>());
+    }
+}

src/main/java/seedu/address/model/Row.java

@@ -0,0 +1,30 @@
+package seedu.address.model;
+
+import java.util.HashSet;
+
+import seedu.address.model.person.Address;
+import seedu.address.model.person.Email;
+import seedu.address.model.person.Name;
+import seedu.address.model.person.Person;
+import seedu.address.model.person.Phone;
+
+/**
+ * Encapsulates a row in the schedule timetable.
+ */
+public class Row {
+    private String timing;
+
+    public int getSize() {
+        return 0;
+    }
+
+    public String getTiming() {
+        return timing;
+    }
+
+    // Change this to return Interivewee instead later
+    public Person getInterviewee(int index) {
+        return new Person(new Name("John Doe"), new Phone("12345678"), new Email("johndoe@mail.com"),
+            new Address("Singapore"), new HashSet<>());
+    }
+}

src/main/java/seedu/address/model/Schedule.java

@@ -0,0 +1,70 @@
+package seedu.address.model;
+
+/**
+ * Encapsulates the schedule timetable in memory.
+ */
+public class Schedule {
+    private String date;
+
+    /**
+     * Returns the first row of table.
+     * @return the first row of table.
+     */
+    public Row getFirstRow() {
+        return new Row();
+    }
+
+    /**
+     * Returns a row in the table.
+     * @param index the index of the row in the table.
+     * @return a row in the table.
+     */
+    public Row getRow(int index) {
+        return new Row();
+    }
+
+    /**
+     * Returns a row in the table with the timing given
+     * @param timing timing of the row.
+     * @return a row in the table with the timing given
+     */
+    public Row getRow(String timing) {
+        return new Row();
+    }
+
+    /**
+     * Returns a column in the table.
+     * @param index index of the column in the table.
+     * @return a column in the table.
+     */
+    public Column getColumn(int index) {
+        return new Column();
+    }
+
+    /**
+     * Returns a column in the table with the interviewer's description given.
+     * @param interviewerDesc the title of the column, which is the interviewer's description.
+     * @return a column in the table with the interviewer's description given.
+     */
+    public Column getColumn(String interviewerDesc) {
+        return new Column();
+    }
+
+    /**
+     * Deletes a column in the table with the index given.
+     * @param index the index of the column in the table.
+     * @return the deleted column in the table with the index given.
+     */
+    public Column deleteColumn(int index) {
+        return new Column();
+    }
+
+    /**
+     * Deletes a column in the table with the interviewer's description given.
+     * @param interviewerDesc the title of the column, which is the interviewer's description.
+     * @return the deleted column in the table with the interviewer's description given.
+     */
+    public Column deleteColumn(String interviewerDesc) {
+        return new Column();
+    }
+}

src/test/java/seedu/address/model/ColumnTest.java

@@ -0,0 +1,44 @@
+package seedu.address.model;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.HashSet;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.address.model.person.Address;
+import seedu.address.model.person.Email;
+import seedu.address.model.person.Name;
+import seedu.address.model.person.Person;
+import seedu.address.model.person.Phone;
+
+public class ColumnTest {
+    @Test
+    public void getSize_skeleton_true() {
+        assertEquals(0, new Column().getSize());
+    }
+
+    // Change this to return Interviewee
+    @Test
+    public void getInterviewer_skeleton_true() {
+        Person person = new Person(new Name("John Doe"), new Phone("12345678"), new Email("johndoe@mail.com"),
+            new Address("Singapore"), new HashSet<>());
+        assertEquals(person, new Column().getInterviewer());
+    }
+
+    // Change this to return Interivewee instead later
+    @Test
+    public void getInterviewee_indexSkeleton_true() {
+        Person person = new Person(new Name("John Doe"), new Phone("12345678"), new Email("johndoe@mail.com"),
+            new Address("Singapore"), new HashSet<>());
+        assertEquals(person, new Column().getInterviewee(0));
+    }
+
+    // Change this to return Interivewee instead later
+    @Test
+    public void getInterviewee_timingSkeleton_true() {
+        Person person = new Person(new Name("John Doe"), new Phone("12345678"), new Email("johndoe@mail.com"),
+            new Address("Singapore"), new HashSet<>());
+        assertEquals(person, new Column().getInterviewee("26/10/2019 6:00pm-6:30pm"));
+    }
+}

src/test/java/seedu/address/model/RowTest.java

@@ -0,0 +1,36 @@
+package seedu.address.model;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import java.util.HashSet;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.address.model.person.Address;
+import seedu.address.model.person.Email;
+import seedu.address.model.person.Name;
+import seedu.address.model.person.Person;
+import seedu.address.model.person.Phone;
+
+/**
+ * Skeleton for RowTest class
+ */
+public class RowTest {
+    @Test
+    public void getSize_skeleton_true() {
+        assertEquals(0, new Row().getSize());
+    }
+
+    @Test
+    public void getTiming_skeleton_true() {
+        assertNull(new Row().getTiming());
+    }
+
+    @Test
+    public void getInterviewee_skeleton_true() {
+        Person person = new Person(new Name("John Doe"), new Phone("12345678"), new Email("johndoe@mail.com"),
+            new Address("Singapore"), new HashSet<>());
+        assertEquals(person, new Row().getInterviewee(0));
+    }
+}

src/test/java/seedu/address/model/ScheduleTest.java

@@ -0,0 +1,43 @@
+package seedu.address.model;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.junit.jupiter.api.Test;
+
+public class ScheduleTest {
+
+    @Test
+    public void getFirstRow_skeleton_true() {
+        assertNotNull(new Schedule().getFirstRow());
+    }
+
+    @Test
+    public void getRow_indexSkeleton_true() {
+        assertNotNull(new Schedule().getRow(0));
+    }
+
+    @Test
+    public void getRow_timingSkeleton_true() {
+        assertNotNull(new Schedule().getRow("26/10/2019 6:00pm-6:30pm"));
+    }
+
+    @Test
+    public void getColumn_indexSkeleton_true() {
+        assertNotNull(new Schedule().getColumn(0));
+    }
+
+    @Test
+    public void getColumn_interviewerDescSkeleton_true() {
+        assertNotNull(new Schedule().getColumn("26/10/2019 6:00pm-6:30pm"));
+    }
+
+    @Test
+    public void deleteColumn_indexSkeleton_true() {
+        assertNotNull(new Schedule().deleteColumn(0));
+    }
+
+    @Test
+    public void deleteColumn_interviewerDescSkeleton_true() {
+        assertNotNull(new Schedule().deleteColumn("26/10/2019 6:00pm-6:30pm"));
+    }
+}