Exemple #1
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def test_list_input():
    assert get_first_unique_letter([1, 2, 3]) is None
Exemple #2
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def test_first_input():
    assert get_first_unique_letter(first_input) == 'B'
Exemple #3
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def test_dict_input():
    assert get_first_unique_letter({"key": "value"}) is None
Exemple #4
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def test_number_input():
    assert get_first_unique_letter(334) == '4'
Exemple #5
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def test_no_input():
    assert get_first_unique_letter() is None
Exemple #6
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def test_fourth_input():
    assert get_first_unique_letter(fourth_input) == 'Y'
Exemple #7
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def test_second_input():
    assert get_first_unique_letter(second_input) == 'C'