import unittest

import tkinter as tk

from tkinter import ttk

from craft$\_$workshop import WorkshopApp, Student, Course

class TestWorkshopApp$($unittest$.$TestCase$)$:

def setUp$($self$)$:

self.root $=$ tk$.$Tk$()$

self.app $=$ WorkshopApp$($self$.$root$)$

def show$\_$student$\_$details$($self$,$ student$)$:

details$\_$window $=$ tk$.$Toplevel$($self$.$root, name$=$"details$\_$window"$)$

details$\_$window.title$("$Student Details"$)$

labels $=["$Name$",$ "Home Phone", "Mobile Phone", "Address", "Email"$]$

entries $=\{\}$

for i$,$ label in enumerate$($labels$)$:

ttk$.$Label$($details$\_$window, text$=$f$"\{$label$\}$:$").$grid$($row$=$i$,$ column$=0,$ padx$=5,$ pady$=5)$

entry $=$ ttk$.$Entry$($details$\_$window$)$

entry.insert$(0,$ getattr$($student$,$ label.lower$().$replace$("","\_")))$

entry.grid$($row$=$i$,$ column$=1,$ padx$=5,$ pady$=5)$

entries$[$label$]=$ entry

tree $=$ ttk$.$Treeview$($details$\_$window, columns$=(\text{'}$Course ID$\text{'},$ 'Payment'$),$ show$=$'headings'$)$

tree.heading$(\text{'}$Course ID$\text{'},$ text$=$'Course ID$\text{'})$

tree.heading$(\text{'}$Payment$\text{'},$ text$=$'Payment'$)$

tree.grid$($row$=$len$($labels$),$ column$=0,$ columnspan$=2,$ padx$=5,$ pady$=5,$ sticky$=$'nsew'$)$

for course$\_$id$,$ payment in student.payments.items$()$:

tree.insert$(\text{'}\text{'},$ 'end', values$=($course$\_$id$,$ f$"$$$\{$payment$\}"))$

save$\_$btn $=$ ttk$.$Button$($details$\_$window, text$=$"Save", command$=$lambda: self.save$\_$student$\_$changes$($student$,$ entries$))$

save$\_$btn$.$grid$($row$=$len$($labels$)+1,$ column$=1,$ padx$=5,$ pady$=10)$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

unittest.main$()$

When I run this test, it says $0$ tests. How can I fix?