Tirsvad
a34bf6bbc2
Challenge 1 draws four sides and turns right 90 degrees after each. Challenge 2 puts the pen down for a dash and up for a gap and leaves it down at the end. Lengths and counts come from constants.py; invalid values raise ValueError. Task: MIL-002#3 Task: MIL-002#4 Task: MIL-002#5
47 lines
1.0 KiB
Python
47 lines
1.0 KiB
Python
import pytest
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from tests.fakes import FakePen
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from turtle_challenges.constants import RIGHT_ANGLE_DEGREES, SQUARE_SIDE_LENGTH
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from turtle_challenges.square import draw_square
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def test_draw_square_moves_forward_and_turns_right_four_times() -> None:
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pen = FakePen()
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draw_square(pen)
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assert (
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pen.calls
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== [
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("forward", (SQUARE_SIDE_LENGTH,)),
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("right", (RIGHT_ANGLE_DEGREES,)),
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]
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* 4
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)
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def test_draw_square_uses_the_given_side_length() -> None:
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pen = FakePen()
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draw_square(pen, side_length=40)
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assert pen.args_of("forward") == [(40,)] * 4
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def test_draw_square_returns_the_turtle_to_its_start_heading() -> None:
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pen = FakePen()
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draw_square(pen)
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assert pen.heading() == 0
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@pytest.mark.parametrize("side_length", [0, -5])
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def test_draw_square_rejects_a_side_that_is_not_positive(side_length: float) -> None:
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pen = FakePen()
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with pytest.raises(ValueError, match="side_length"):
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draw_square(pen, side_length=side_length)
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assert pen.calls == []
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