def test_display_matrix():
  z_test = [[1, 1, 1], [0, 0, 1], [0, 1, 0], [1, 0, 0], [1, 1, 1]]
  display_matrix(z_test, title = "Test - Z")

def test_display_data():
  real_data_test = parse("1 o 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 1 1 1 0 0 0 1 0 0 0 1 1 0 1 1 0 0 0 0 1 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 1 1 1 0 0 0 1 1 1 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0", 16, 8)[0]

  display_matrix(real_data_test, title = "First real character")

from display import display_matrix
from parse import parse

def test_display_matrix():
  z_test = [[1, 1, 1], [0, 0, 1], [0, 1, 0], [1, 0, 0], [1, 1, 1]]
  display_matrix(z_test, title = "Test - Z")

def test_display_data():
  real_data_test = parse("1 o 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 1 1 1 0 0 0 1 0 0 0 1 1 0 1 1 0 0 0 0 1 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 1 1 1 0 0 0 1 1 1 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0", 16, 8)[0]

  display_matrix(real_data_test, title = "First real character")

def test_all():
  test_display_matrix()
  test_display_data()

Add test_all method to easily add to suite of tests