Lesson 3 is done

app/src/main/java/com/example/paktalin/agilejava/DateUtil.java

@@ -10,7 +10,7 @@ import java.util.GregorianCalendar;
 
 class DateUtil {
 
-    Date createDate(int year, int month, int date) {
+    static Date createDate(int year, int month, int date) {
         GregorianCalendar calendar = new GregorianCalendar();
         calendar.clear();
         calendar.set(Calendar.YEAR, year);

app/src/main/java/com/example/paktalin/agilejava/RosterReporter.java

@@ -7,29 +7,38 @@ package com.example.paktalin.agilejava;
  class RosterReporter {
 
     static final String NEW_LINE = System.getProperty("line.separator");
-    static String ROSTER_REPORT_HEADER = "Student" + NEW_LINE +
-            "_____" + NEW_LINE;
+    static String ROSTER_REPORT_HEADER = "Student" + NEW_LINE + "_____" + NEW_LINE;
     static String ROSTER_REPORT_FOOTER = NEW_LINE + "# students = ";
+
     private CourseSession session;
+    private StringBuilder buffer;
 
     RosterReporter(CourseSession session) {
         this.session = session;
     }
 
+    String getReport() {
+        buffer = new StringBuilder();
 
+        writeHeader();
+        writeBody();
+        writeFooter();
 
-    String getReport() {
-        StringBuilder buffer = new StringBuilder();
+        return buffer.toString();
+    }
 
+    private void writeHeader() {
         buffer.append(ROSTER_REPORT_HEADER);
+    }
 
+    private void writeBody() {
         for (Student student : session.getAllStudents()) {
             buffer.append(student.getName());
             buffer.append(NEW_LINE);
         }
+    }
 
+    private void writeFooter() {
         buffer.append(ROSTER_REPORT_FOOTER + session.getAllStudents().size() + NEW_LINE);
-
-        return buffer.toString();
     }
 }

app/src/test/java/com/example/paktalin/agilejava/CourseSessionTest.java

@@ -14,7 +14,7 @@ public class CourseSessionTest extends TestCase {
     private Date startDate;
 
     public void setUp() {
-        startDate = new DateUtil().createDate(2003, 1, 6);
+        startDate = DateUtil.createDate(2003, 1, 6);
         session = new CourseSession("ENGL", "101", startDate);
     }
 
@@ -38,7 +38,7 @@ public class CourseSessionTest extends TestCase {
     }
 
     public void testCourseDates() {
-        Date sixteenWeeksOut = new DateUtil().createDate(2003, 4, 25);
+        Date sixteenWeeksOut = DateUtil.createDate(2003, 4, 25);
         assertEquals(sixteenWeeksOut, session.getEndDate());
     }
 }

app/src/test/java/com/example/paktalin/agilejava/RosterReporterTest.java

@@ -11,12 +11,14 @@ public class RosterReporterTest extends TestCase {
 
     public void testRosterReport() {
         CourseSession session = new CourseSession("ENGL", "101",
-                new DateUtil().createDate(2003, 1, 6));
+                DateUtil.createDate(2003, 1, 6));
 
         session.enroll(new Student("A"));
         session.enroll(new Student("B"));
 
         String rosterReport = new RosterReporter(session).getReport();
+        System.out.println(rosterReport);
+
         assertEquals(
                 RosterReporter.ROSTER_REPORT_HEADER +
                         "A" + RosterReporter.NEW_LINE +