init

tests/test_money.py

@@ -0,0 +1,77 @@
+import pytest
+
+from common_cents.money import (
+    format_cents,
+    format_cents_input,
+    parse_cents_csv,
+    parse_dollars,
+)
+
+
+@pytest.mark.parametrize(
+    "raw, expected",
+    [
+        ("1", 100),
+        ("1.5", 150),
+        ("1.50", 150),
+        ("$1,234.56", 123456),
+        (".50", 50),
+        ("5.", 500),
+        ("5.999", 599),  # truncate, not round (string-based)
+        ("1.005", 100),
+        ("-5.00", -500),
+        ("-.50", -50),
+        ("", None),
+        ("   ", None),
+        ("abc", None),
+        ("$", None),
+        ("-", None),
+        ("-$5", None),
+    ],
+)
+def test_parse_dollars(raw, expected):
+    assert parse_dollars(raw) == expected
+
+
+@pytest.mark.parametrize(
+    "raw, expected",
+    [
+        ("100", 100),
+        ("14,901", 14901),
+        (" 50 ", 50),
+    ],
+)
+def test_parse_cents_csv(raw, expected):
+    assert parse_cents_csv(raw) == expected
+
+
+def test_parse_cents_csv_invalid():
+    with pytest.raises(ValueError):
+        parse_cents_csv("abc")
+
+
+@pytest.mark.parametrize(
+    "cents, expected",
+    [
+        (0, "$0.00"),
+        (100, "$1.00"),
+        (1234, "$12.34"),
+        (123456, "$1,234.56"),
+        (-500, "-$5.00"),
+        (-12345, "-$123.45"),
+    ],
+)
+def test_format_cents(cents, expected):
+    assert format_cents(cents) == expected
+
+
+@pytest.mark.parametrize(
+    "cents, expected",
+    [
+        (100, "1.00"),
+        (1234, "12.34"),
+        (5, "0.05"),
+    ],
+)
+def test_format_cents_input(cents, expected):
+    assert format_cents_input(cents) == expected