def test_model_perform_logging(self):
model = QuadraticEquationViewModel()
model.set_a(2)
model.set_b(4)
model.set_c(2)
model.perform()
self.assertEqual('Result = Answer:\n x = -1.0',
model.logger.get_last_message())
def test_input_wrong_data(self):
model = QuadraticEquationViewModel()
model.set_a('@1')
model.set_b(4)
model.set_c(2)
model.perform()
wrong_message = 'Incorrect input'
self.assertEqual(wrong_message, model.logger.get_last_message())
def test_model_perform_all_message_logging(self):
model = QuadraticEquationViewModel()
model.set_a(2)
model.set_b(4)
model.set_c(2)
model.perform()
log_message = [
'Setting a = 2', 'Setting b = 4', 'Setting c = 2',
'Button clicked', 'a = 2, b = 4, c = 2',
'Result = Answer:\n x = -1.0'
]
self.assertEqual(log_message, model.logger.get_log_messages()[-6:])
def test_set_c_logging(self):
model = QuadraticEquationViewModel()
model.set_c(2)
self.assertEqual('Setting c = 2', model.logger.get_last_message())
def test_init_logging(self):
model = QuadraticEquationViewModel(2, 4, 2)
self.assertEqual('Welcome!', model.logger.get_last_message())
def test_by_default_button_is_disable(self):
model = QuadraticEquationViewModel()
self.assertEqual('disabled', model.is_button_enable())
def test_when_enter_incorrect_values(self):
model = QuadraticEquationViewModel('-1a', '123', 'q9')
self.assertEqual('disabled', model.is_button_enable())
def test_correct_set_value(self):
model = QuadraticEquationViewModel()
model.set_a(1)
model.set_b(10)
model.set_c(-12)
self.assertEqual(1, model.get_a())
self.assertEqual(10, model.get_b())
self.assertEqual(-12, model.get_c())
def test_when_enter_incorrect_values_throw_exception(self):
model = QuadraticEquationViewModel(2, '@48', 2)
model.perform()
answer = 'Incorrect input'
self.assertEqual(answer, model.get_error_message())
def test_when_enter_values_display_result(self):
model = QuadraticEquationViewModel(2, 4, 2)
model.perform()
answer = 'Answer:\n x = -1.0'
self.assertEqual(answer, model.get_result())
def test_when_clear_c_button_disabled(self):
model = QuadraticEquationViewModel(1, -1, 1)
model.set_c(None)
self.assertEqual('disabled', model.is_button_enable())
def test_when_enter_a_b_c_button_enabled(self):
model = QuadraticEquationViewModel(1, 1, 1)
self.assertTrue(model.is_button_enable())
class GUIView(object):
view_model = QuadraticEquationViewModel()
def __init__(self):
self.root = tk.Tk()
self.root['bg'] = 'maroon1'
self.root.title('Solve quadratic equation')
self.root.geometry('600x300')
self.root.resizable(width=False, height=True)
self.frame = tk.Frame(self.root, bg='SkyBlue1')
self.title = tk.Label(self.frame,
text='Введите начало и конец промежутка',
bg='gray21',
font=40)
self.a_value = tk.Entry(self.frame, bg='white', state='normal')
self.b_value = tk.Entry(self.frame, bg='white')
self.c_value = tk.Entry(self.frame, bg='white')
self.btn = tk.Button(self.frame, text='Solve', bg='gray21')
self.res = tk.Label(self.frame, text='Result', bg='gray21', font=40)
self.error_field = tk.Label(self.frame,
text='',
fg='red',
bg='gray21',
font=('', 12, 'bold'))
self.set_weight_to_grid()
self.bind_events()
self.mvvm_bind()
self.mvvm_back_bind()
self.root.mainloop()
def set_weight_to_grid(self):
self.root.grid_rowconfigure(2, minsize=30)
self.root.grid_rowconfigure(5, minsize=30, weight=60)
self.frame.place(relx=0.05, rely=0.05, relwidth=0.9, relheight=0.9)
self.a_value.grid(row=1, column=0, stick='wens', padx=5, pady=5)
self.b_value.grid(row=1, column=2, stick='wens', padx=5, pady=5)
self.c_value.grid(row=1, column=4, stick='wens', padx=5, pady=5)
self.btn.grid(row=2, column=1, stick='wens')
self.res.grid(row=4, column=0, columnspan=3, stick='we', padx=5)
self.error_field.grid(row=5,
column=0,
columnspan=3,
stick='we',
padx=5)
def bind_events(self):
self.a_value.bind('<KeyRelease>', self.change_a)
self.b_value.bind('<KeyRelease>', self.change_b)
self.c_value.bind('<KeyRelease>', self.change_c)
self.btn.bind('<Button-1>', self.btn_clicked)
def btn_clicked(self, event):
self.mvvm_bind()
self.view_model.perform()
self.mvvm_back_bind()
def change_a(self, event):
self.mvvm_bind()
self.mvvm_back_bind()
def change_b(self, event):
self.mvvm_bind()
self.mvvm_back_bind()
def change_c(self, event):
self.mvvm_bind()
self.mvvm_back_bind()
def mvvm_bind(self):
self.view_model.set_a(self.a_value.get())
self.view_model.set_b(self.b_value.get())
self.view_model.set_c(self.c_value.get())
def mvvm_back_bind(self):
self.a_value.delete(0, tk.END)
self.a_value.insert(tk.END, self.view_model.get_a())
self.b_value.delete(0, tk.END)
self.b_value.insert(tk.END, self.view_model.get_b())
self.c_value.delete(0, tk.END)
self.c_value.insert(tk.END, self.view_model.get_c())
self.btn.config(state=self.view_model.is_button_enable())
self.res.config(
text='{}\n'.format(get_result_text(self.view_model.get_result())))
self.error_field.config(text='{}\n'.format(
get_error_text(self.view_model.get_error_message())))