Tirsvad
9318a07fa0
random_color returns an immutable (red, green, blue) tuple of integers from 0 to 255 and random_palette_color picks a named color. Both take an optional random.Random so that tests can seed them. Task: MIL-003#1 Task: MIL-003#2
54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
import random
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from turtle_challenges.colors import random_color, random_palette_color
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from turtle_challenges.constants import (
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COLOR_CHANNEL_MAX,
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COLOR_CHANNEL_MIN,
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COLOR_PALETTE,
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)
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def test_random_color_is_a_tuple_of_three_integers() -> None:
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color = random_color(random.Random(1))
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assert isinstance(color, tuple)
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assert len(color) == 3
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assert all(isinstance(channel, int) for channel in color)
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def test_random_color_channels_stay_in_range() -> None:
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rng = random.Random(2)
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for _ in range(500):
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assert all(
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COLOR_CHANNEL_MIN <= channel <= COLOR_CHANNEL_MAX
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for channel in random_color(rng)
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)
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def test_random_color_is_repeatable_with_the_same_seed() -> None:
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first = [random_color(random.Random(7)) for _ in range(3)]
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second = [random_color(random.Random(7)) for _ in range(3)]
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assert first == second
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def test_random_color_varies_between_calls() -> None:
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rng = random.Random(3)
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assert len({random_color(rng) for _ in range(20)}) > 1
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def test_random_color_works_without_a_generator() -> None:
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assert len(random_color()) == 3
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def test_random_palette_color_comes_from_the_palette() -> None:
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rng = random.Random(4)
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assert {random_palette_color(rng) for _ in range(100)} <= set(COLOR_PALETTE)
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def test_random_palette_color_works_without_a_generator() -> None:
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assert random_palette_color() in COLOR_PALETTE
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