def test_get_ascii_field():
g = Grapher()
values = [0, 1, 2]
field = g._get_ascii_field(values=values)
assert field[0][0] == '/'
assert field[1][1] == '/'
assert field[2][2] == '-'
assert field[2][0] == ' '
def test_draw_ascii_graph():
g = Grapher()
values = [0, 1, 2, 2, 1, 0, 3, 0]
field = g._get_ascii_field(values=values)
graph_string = g._draw_ascii_graph(field)
assert '\\' in graph_string
assert '-' in graph_string
assert '/' in graph_string
assert '|' in graph_string
assert graph_string.count('\n') == 3
for line in graph_string.splitlines():
assert len(line) == 8