Fixed Bug418

@@ -919,2 +918,3 @@
 
-    $sql = "INSERT INTO `course_ta`(`Course_ID`, `TA`) VALUES ('$id','$ta')";
+    // Check if the TA is already assigned to the course
+    $check_sql = "SELECT * FROM `course_ta` WHERE `Course_ID`='$id' AND `TA`='$ta'";

@@ -0,0 +9,4 @@
+driver = webdriver.Chrome()
+
+# Open the admin url
+driver.get("http://localhost/itech/lrr/Admin.php")

@@ -0,0 +48,4 @@
+tas = ["MPIANA", "KABWANGA", "mark"]  
+
+@pytest.mark.parametrize("course_name, ta_name", [(course, ta) for course in courses for ta in tas])
+def assign_ta_test(course_name, ta_name):

@@ -0,0 +62,4 @@
+        result_file.write(f"Course={course_name}, TA={ta_name}, Result={result}, Alert={alert_text}\n")
+
+# Close the browser window
+driver.quit()

@@ -0,0 +52,4 @@
+    alert_text = assign_ta(driver, course_name, ta_name)
+
+    try:
+        assert "Success" in alert_text or "Error" in alert_text

@@ -0,0 +51,4 @@
+def assign_ta_test(course_name, ta_name):
+    alert_text = assign_ta(driver, course_name, ta_name)
+
+    try:

@@ -0,0 +47,4 @@
+courses = ["Python", "computer", "testing"]  
+tas = ["MPIANA", "KABWANGA", "mark"]  
+
+@pytest.mark.parametrize("course_name, ta_name", [(course, ta) for course in courses for ta in tas])