diff --git a/src/tests/AddItemBookTest.java b/src/tests/AddItemBookTest.java
index 2b559e2da17214d6966d262b79306e7faa0b8f18..9c1e0f02f480a7ebc4f47916472c1bc52a7a9d7e 100644
--- a/src/tests/AddItemBookTest.java
+++ b/src/tests/AddItemBookTest.java
@@ -24,43 +24,27 @@ public class AddItemBookTest {
     private static int addItemBookBadEntryTest(ISocialNetwork sn, String login,
                                                String pwd, String title, String kind, String author, int nbPages, String testId, String errorMessage) {
 
-        int nbBooks = sn.nbBooks(); // Number of books when starting to
-        // run this method
+        int nbBooks = sn.nbBooks(); // Number of books when starting to run this method
         try {
             sn.addItemBook(login, pwd, title, kind, author, nbPages); // Try to add this book
-            // Reaching this point means that no exception was thrown by
-            // addItemBook()
-            System.out.println("Err " + testId + " : " + errorMessage); // display
-            // the
-            // error
-            // message
+            System.out.println("Err " + testId + " : " + errorMessage); // display error
             return 1; // and return the "error" value
-        } catch (BadEntryException e) { // BadEntry exception was thrown by
-            // addItemBook() : this is a good start!
-            // Let's now check if 'sn' was not
-            // impacted
-            if (sn.nbBooks() != nbBooks) { // The number of members has
-                // changed : this is an error
-                // case.
+        } catch (BadEntryException e) { // BadEntry exception was thrown
+            // check if 'sn' was not impacted
+            if (sn.nbBooks() != nbBooks) {
                 System.out
                         .println("Err "
                                 + testId
-                                + " : BadEntry was thrown but the number of books was changed"); // Display
-                // a
-                // specific
-                // error
-                // message
+                                + " : BadEntry was thrown but the number of books was changed");
+                // Display error for the number of books
                 return 1; // return "error" value
             } else
-                // The number of books hasn't changed, which is considered a
-                // good indicator that 'sn' was not modified
-                return 0; // return success value : everything seems OK, nothing
-            // to display
-        } catch (Exception e) { // An exception was thrown by addItemBook(), but
-            // it was not the expected exception BadEntry
+                // The number of books hasn't changed,'sn' not modified
+                return 0; //  everything seems OK
+        } catch (Exception e) { // An exception was thrown by addItemBook(), Unexpected exception
             System.out.println("Err " + testId + " : unexpected exception. "
                     + e); // Display a specific error message
-            e.printStackTrace(); // Display contextual info about what happened
+            e.printStackTrace();
             return 1; // return error value
         }
     }
@@ -81,40 +65,25 @@ public class AddItemBookTest {
     private static int addItemBookAlreadyExistsTest(ISocialNetwork sn,
                                                     String login, String pwd, String title, String kind, String author, int nbPages, String testId,
                                                     String errorMessage) {
-        int nbBooks = sn.nbBooks(); // Number of members when starting to
-        // process this method
+        int nbBooks = sn.nbBooks(); // Number of members when starting to process this method
         try {
-            sn.addItemBook(login, pwd, title, kind, author, nbPages); // Try to add this book
-            // Reaching this point means that no exception was thrown by
-            // addItemBook()
-            System.out.println("Err " + testId + " : " + errorMessage); // display
-            // the
-            // error
-            // message
+            sn.addItemBook(login, pwd, title, kind, author, nbPages); // Try to add this book that exists
+            System.out.println("Err " + testId + " : " + errorMessage); // display error message
             return 1; // and return the "error" value
-        } catch ( ItemBookAlreadyExistsException e) {// AlreadyExists exception was
-            // thrown by addItemBook() :
-            // this is a good start!
-            // Let's now check if 'sn'
-            // was not impacted
+        } catch ( ItemBookAlreadyExistsException e) {// AlreadyExists exception was launched
+            //checking sn changes
             if (sn.nbBooks() != nbBooks) {
                 System.out
                         .println("Err "
                                 + testId
                                 + " : ItemBookAlreadyExists was thrown, but the number of books was changed"); // Display
-                // a
-                // specific
-                // error
-                // message
-                return 1;// and return the "error" value
+                // error message
+                return 1;// error value assigned
             } else
-                return 0; // return success value : everything is OK, nothing to
+                return 0; // OK value
             // display
-        } catch (Exception e) { // An exception was thrown by addMember(), but
-            // it was not the expected exception
-            // AlreadyExists
-            System.out.println("Err " + testId + " : unexpected exception. "
-                    + e); // Display a specific error message
+        } catch (Exception e) { // An exception was thrown by addMember()
+            System.out.println("Err " + testId + " : unexpected exception. "  + e); // Display unexpected exception
             e.printStackTrace(); // Display contextual info about what happened
             return 1; // return error value
         }
@@ -135,27 +104,20 @@ public class AddItemBookTest {
      */
     private static int addItemBookOKTest(ISocialNetwork sn, String login,
                                          String pwd, String title, String kind, String author, int nbPages, String testId) {
-        int nbBooks = sn.nbBooks(); // Number of books when starting to
-        // process this method
+        int nbBooks = sn.nbBooks(); // Number of books
         try {
             sn.addItemBook(login, pwd, title, kind, author, nbPages); // Try to add this book
-            // No exception was thrown. That's a good start !
-            if (sn.nbBooks() != nbBooks + 1) { // But the number of books
-                // hasn't changed
-                // accordingly
+            if (sn.nbBooks() != nbBooks + 1) { // Number does not changed
                 System.out.println("Err " + testId
                         + " : the number of books (" + nbBooks
                         + ") was not incremented"); // Error message displayed
                 return 1; // return error code
             } else
-                return 0; // return success code : everything is OK, nothing to
+                return 0; // return OK code
             // display
-        } catch (Exception e) {// An exception was thrown by addMember() : this
-            // is an error case
+        } catch (Exception e) {// An exception was thrown by addMember()
             System.out
-                    .println("Err " + testId + " : unexpected exception " + e); // Error
-            // message
-            // displayed
+                    .println("Err " + testId + " : unexpected exception " + e); // Error message
             e.printStackTrace(); // Display contextual info about what happened
             return 1; // return error code
         }
@@ -181,31 +143,20 @@ public class AddItemBookTest {
         // process this method
         try {
             sn.addItemBook(login, pwd, title, kind, author, nbPages); // Try to add this book
-            // Reaching this point means that no exception was thrown by
-            // addItemBook()
-            System.out.println("Err " + testId + " : " + errorMessage); // display
-            // the
-            // error
-            // message
+            // Reaching this point means that no exception was thrown by addItemBook()
+            System.out.println("Err " + testId + " : " + errorMessage); // display error message
             return 1; // and return the "error" value
-        } catch ( NotMemberException e) {// AlreadyExists exception was
-            // thrown by addItemBook() :
-            // this is a good start!
-            // Let's now check if 'sn'
-            // was not impacted
+        } catch ( NotMemberException e) {// AlreadyExists exception was thrown by addItemBook() :
+            //check if 'sn' was not impacted
             if (sn.nbBooks() != nbBooks) {
                 System.out
                         .println("Err "
                                 + testId
                                 + " : NotMember was thrown, but the number of books was changed"); // Display
-                // a
-                // specific
-                // error
-                // message
+                // a error message launched
                 return 1;// and return the "error" value
             } else
-                return 0; // return success value : everything is OK, nothing to
-            // display
+                return 0; // return OK value
         } catch (Exception e) { // An exception was thrown by addMember(), but
             // it was not the expected exception
             // AlreadyExists
@@ -241,14 +192,10 @@ public class AddItemBookTest {
                         + ") was not incremented"); // Error message displayed
                 return 1; // return error code
             } else
-                return 0; // return success code : everything is OK, nothing to
-            // display
-        } catch (Exception e) {// An exception was thrown by addMember() : this
-            // is an error case
+                return 0; // return success code
+        } catch (Exception e) {// An exception was thrown by addMember() : error case
             System.out
-                    .println("Err " + testId + " : unexpected exception " + e); // Error
-            // message
-            // displayed
+                    .println("Err " + testId + " : unexpected exception " + e); // Error message
             e.printStackTrace(); // Display contextual info about what happened
             return 1; // return error code
         }
@@ -268,8 +215,7 @@ public class AddItemBookTest {
         System.out.println("Testing addItemBook()");
         // <=> test n°1
 
-        // check if incorrect parameters cause addItemBook() to throw BadEntry
-        // exception
+        // check if incorrect parameters cause addItemBook() to throw BadEntry exception
 
         //populate 'sn' with 3 members
         nbErrors += addMemberOKTest(sn,"Paul","paul","Student","1.0a");
@@ -357,7 +303,7 @@ public class AddItemBookTest {
             System.out.println("AddItemBookTest : " + tr);
             return tr;
         }
-        catch (NotTestReportException e){ //This shouldn't happen
+        catch (NotTestReportException e){
             System.out.println("Unexpected error in AddMemberTest test code - Can't return valuable test results");
             return null;
         }