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52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
"""Tests for word-frequency."""
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import pytest
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from solution import top_words
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class TestBasicCases:
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"""Test basic functionality with typical inputs."""
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def test_basic_frequency(self):
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"""Test basic word counting."""
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result = top_words("the quick brown fox jumps over the lazy dog the fox", 2)
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assert result == [("the", 3), ("fox", 2)]
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def test_all_unique(self):
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"""Test when all words are unique."""
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result = top_words("one two three", 2)
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assert result == [("one", 1), ("three", 1)] or result == [("one", 1), ("two", 1)]
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def test_single_word_repeated(self):
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"""Test with one word repeated."""
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result = top_words("hello hello hello", 1)
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assert result == [("hello", 3)]
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class TestEdgeCases:
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"""Test edge cases and boundary conditions."""
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def test_empty_string(self):
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"""Test with empty input."""
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result = top_words("", 5)
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assert result == []
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def test_n_greater_than_unique_words(self):
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"""Test when n exceeds unique word count."""
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result = top_words("hello world", 10)
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assert len(result) == 2
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def test_case_insensitive(self):
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"""Test that counting is case-insensitive."""
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result = top_words("Hello HELLO hello", 1)
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assert result == [("hello", 3)]
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def test_punctuation_ignored(self):
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"""Test that punctuation is stripped."""
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result = top_words("hello, world! hello.", 1)
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assert result == [("hello", 2)]
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def test_alphabetical_tiebreaker(self):
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"""Test alphabetical ordering for same frequency."""
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result = top_words("cat bat ant", 3)
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assert result == [("ant", 1), ("bat", 1), ("cat", 1)]
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