feat(browser): auto-commit con 178 cambios

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

python/functions/datascience/cramers_v_test.py

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+"""Tests para cramers_v."""
+
+import os
+import random
+import sys
+
+sys.path.insert(0, os.path.dirname(__file__))
+
+from cramers_v import cramers_v
+
+
+def test_perfect_association_is_near_one():
+    a = ["x", "y", "z", "x", "y", "z", "x", "y", "z", "x", "y", "z"]
+    b = list(a)  # b == a -> asociacion perfecta
+    v = cramers_v(a, b)
+    assert v > 0.95
+    assert v <= 1.0
+
+
+def test_independent_columns_low_value():
+    rng = random.Random(42)
+    cats = ["a", "b", "c", "d"]
+    a = [rng.choice(cats) for _ in range(2000)]
+    b = [rng.choice(cats) for _ in range(2000)]
+    v = cramers_v(a, b)
+    assert 0.0 <= v < 0.5
+
+
+def test_single_category_returns_zero():
+    a = ["only"] * 10  # <2 categorias en a
+    b = ["x", "y", "x", "y", "x", "y", "x", "y", "x", "y"]
+    assert cramers_v(a, b) == 0.0
+
+
+def test_fewer_than_two_pairs_returns_zero():
+    assert cramers_v([], []) == 0.0
+    assert cramers_v(["a"], ["b"]) == 0.0
+
+
+def test_none_pairs_are_discarded():
+    a = ["x", None, "y", "x", None, "y", "x", "y"]
+    b = ["x", "z", "y", "x", "z", "y", None, "y"]
+    v = cramers_v(a, b)
+    assert isinstance(v, float)
+    assert 0.0 <= v <= 1.0
+
+
+def test_always_returns_float_never_none():
+    assert isinstance(cramers_v(["a", "b"], ["a", "b"]), float)
+    assert isinstance(cramers_v([None], [None]), float)
+
+
+def test_derived_column_high_association():
+    rng = random.Random(7)
+    a = [rng.choice(["red", "green", "blue"]) for _ in range(600)]
+    # b derivada de a (mapeo deterministico) -> alta asociacion.
+    mapping = {"red": "hot", "green": "cool", "blue": "cool"}
+    b = [mapping[x] for x in a]
+    v = cramers_v(a, b)
+    assert v > 0.5