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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 17:35:20 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 17:35:20 +0000 |
commit | e106bf94eff07d9a59771d9ccc4406421e18ab64 (patch) | |
tree | edb6545500e39df9c67aa918a6125bffc8ec1aee /tests/test_utils.py | |
parent | Initial commit. (diff) | |
download | prompt-toolkit-upstream.tar.xz prompt-toolkit-upstream.zip |
Adding upstream version 3.0.36.upstream/3.0.36upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/test_utils.py')
-rw-r--r-- | tests/test_utils.py | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/tests/test_utils.py b/tests/test_utils.py new file mode 100644 index 0000000..6a1c179 --- /dev/null +++ b/tests/test_utils.py @@ -0,0 +1,76 @@ +import itertools + +import pytest + +from prompt_toolkit.utils import take_using_weights + + +def test_using_weights(): + def take(generator, count): + return list(itertools.islice(generator, 0, count)) + + # Check distribution. + data = take(take_using_weights(["A", "B", "C"], [5, 10, 20]), 35) + assert data.count("A") == 5 + assert data.count("B") == 10 + assert data.count("C") == 20 + + assert data == [ + "A", + "B", + "C", + "C", + "B", + "C", + "C", + "A", + "B", + "C", + "C", + "B", + "C", + "C", + "A", + "B", + "C", + "C", + "B", + "C", + "C", + "A", + "B", + "C", + "C", + "B", + "C", + "C", + "A", + "B", + "C", + "C", + "B", + "C", + "C", + ] + + # Another order. + data = take(take_using_weights(["A", "B", "C"], [20, 10, 5]), 35) + assert data.count("A") == 20 + assert data.count("B") == 10 + assert data.count("C") == 5 + + # Bigger numbers. + data = take(take_using_weights(["A", "B", "C"], [20, 10, 5]), 70) + assert data.count("A") == 40 + assert data.count("B") == 20 + assert data.count("C") == 10 + + # Negative numbers. + data = take(take_using_weights(["A", "B", "C"], [-20, 10, 0]), 70) + assert data.count("A") == 0 + assert data.count("B") == 70 + assert data.count("C") == 0 + + # All zero-weight items. + with pytest.raises(ValueError): + take(take_using_weights(["A", "B", "C"], [0, 0, 0]), 70) |