added extra testings

.idea/workspace.xml

@@ -3,6 +3,9 @@
   <component name="ChangeListManager">
     <list default="true" id="721d25be-807f-4a41-a78a-d223bc93b2f4" name="Default Changelist" comment="">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/Run/Lab.class" beforeDir="false" afterPath="$PROJECT_DIR$/out/production/Run/Lab.class" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/Run/Run.class" beforeDir="false" afterPath="$PROJECT_DIR$/out/production/Run/Run.class" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/Run/Student.class" beforeDir="false" afterPath="$PROJECT_DIR$/out/production/Run/Student.class" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/Lab.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Lab.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/Run.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Run.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/Student.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Student.java" afterDir="false" />
@@ -69,22 +72,22 @@
       <screen x="0" y="0" width="1366" height="728" />
     </state>
     <state x="275" y="21" key="#Project_Structure/0.0.1366.728@0.0.1366.728" timestamp="1583492226195" />
-    <state width="1366" height="180" key="GridCell.Tab.0.bottom" timestamp="1583500264815">
+    <state width="1366" height="180" key="GridCell.Tab.0.bottom" timestamp="1583501471086">
       <screen x="0" y="0" width="1366" height="728" />
     </state>
-    <state width="1366" height="180" key="GridCell.Tab.0.bottom/0.0.1366.728@0.0.1366.728" timestamp="1583500264815" />
-    <state width="1366" height="180" key="GridCell.Tab.0.center" timestamp="1583500264814">
+    <state width="1366" height="180" key="GridCell.Tab.0.bottom/0.0.1366.728@0.0.1366.728" timestamp="1583501471086" />
+    <state width="1366" height="180" key="GridCell.Tab.0.center" timestamp="1583501471086">
       <screen x="0" y="0" width="1366" height="728" />
     </state>
-    <state width="1366" height="180" key="GridCell.Tab.0.center/0.0.1366.728@0.0.1366.728" timestamp="1583500264814" />
-    <state width="1366" height="180" key="GridCell.Tab.0.left" timestamp="1583500264814">
+    <state width="1366" height="180" key="GridCell.Tab.0.center/0.0.1366.728@0.0.1366.728" timestamp="1583501471086" />
+    <state width="1366" height="180" key="GridCell.Tab.0.left" timestamp="1583501471086">
       <screen x="0" y="0" width="1366" height="728" />
     </state>
-    <state width="1366" height="180" key="GridCell.Tab.0.left/0.0.1366.728@0.0.1366.728" timestamp="1583500264814" />
-    <state width="1366" height="180" key="GridCell.Tab.0.right" timestamp="1583500264814">
+    <state width="1366" height="180" key="GridCell.Tab.0.left/0.0.1366.728@0.0.1366.728" timestamp="1583501471086" />
+    <state width="1366" height="180" key="GridCell.Tab.0.right" timestamp="1583501471086">
       <screen x="0" y="0" width="1366" height="728" />
     </state>
-    <state width="1366" height="180" key="GridCell.Tab.0.right/0.0.1366.728@0.0.1366.728" timestamp="1583500264814" />
+    <state width="1366" height="180" key="GridCell.Tab.0.right/0.0.1366.728@0.0.1366.728" timestamp="1583501471086" />
     <state x="184" y="0" key="SettingsEditor" timestamp="1583493438190">
       <screen x="0" y="0" width="1366" height="728" />
     </state>

src/Lab.java

@@ -25,6 +25,7 @@ public class Lab {
         if (currentSize < capacity) {
             students[currentSize] = std;
             currentSize++;
+            calculateAvg();
         } else {
             System.out.println("lab is full!!!");
         }
@@ -68,9 +69,11 @@ public class Lab {
         currentSize = 0;
         for (Student i : students) {
             this.students[j] = new Student(i.getFirstName(),i.getLastName(),i.getId());
+            this.students[j].setGrade(i.getGrade());
             j++;
             currentSize++;
         }
+        calculateAvg();
 
     }
 
@@ -88,7 +91,7 @@ public class Lab {
     public void calculateAvg() {
         int sum = 0;
         int i = 0;
-        for (; i < students.length; i++) {
+        for (; i < currentSize ; i++) {
             sum += students[i].getGrade();
         }
         avg = sum / i;

src/Run.java

@@ -7,10 +7,7 @@ public class Run {
         Student std3 = new Student("Ahmad", "Asadi", "9031054");
         //creating a students array
         Student[] students = new Student[3];
-        //initializing the students in the array
-        students[0] = std1;
-        students[1] = std2;
-        students[2] = std3;
+
         //running the simple functions in the AP manual
         std1.print();
         std1.setGrade(15);
@@ -23,23 +20,51 @@ public class Run {
         std3.print();
         std3.setFirstName("HamidReza");
         std3.print();
+        //printing an error message when the grade is invalid
+        std1.setGrade(21);
+        std2.setGrade(-1);
+
+
+        //no problem when the grade is fine
+        std1.setGrade(20);
+        std2.setGrade(19);
+
+
+        //setting the new ID
+        std3.setId("9034212");
+
+        //initializing the students in the array
+        students[0] = std1;
+        students[1] = std2;
+        students[2] = std3;
+
         //running extra functions
+
         //setting the day
         String day = new String("98/1/23");
+
         //setting the capacity
         int cap = 3;
+
         //initializing Lab constructor
         Lab lab = new Lab(cap,day);
+
         //setting the students
         lab.setStudents(students);
+
+        //calulating the average
+        lab.calculateAvg();
+
         //using labs print method
         lab.print();
+
         //now lets set a new day
         String newDay = new String("98/2/2");
         lab.setDay(newDay);
         System.out.println( "this is the new lab day -> " + lab.getDay());
-        //now to show that no one can attend the lab when its full
-        Student std4 = new Student("new students first name","new students last name ","9031059");
+
+        //now to show that no one can attend the lab when its full this will cause an error message
+        Student std4 = new Student("new first name","new last name ","9031059");
         lab.enrollment(std4);
 
         //now lets increase the classes capacity
@@ -47,17 +72,12 @@ public class Run {
         //the new lab student can be enrolled
         lab.enrollment(std4);
         //printing the labs new list
-        students = lab.getStudents();
-        students[0].print();
-        students[1].print();
-        students[2].print();
-        students[3].print();
         lab.print();
+        //what if we want to get the student array itself
+        students = lab.getStudents();
 
-
-
-
-
+        //printing the new average because we just added std4
+        System.out.println("The new lab average is = " + lab.getAvg());
 
     }
 }

src/Student.java

@@ -41,7 +41,7 @@ public class Student {
      * @param score represents the grade of the student
      */
     public void setGrade(int score){
-        if( score < 20 && score >= 0 ) {
+        if( score <= 20 && score >= 0 ) {
             grade = score;
         }
         else