Updated script that can be controled by Nodejs web app

lib/python3.13/site-packages/pandas/tests/series/methods/test_diff.py

@@ -0,0 +1,88 @@
+import numpy as np
+import pytest
+
+from pandas import (
+    Series,
+    TimedeltaIndex,
+    date_range,
+)
+import pandas._testing as tm
+
+
+class TestSeriesDiff:
+    def test_diff_np(self):
+        # TODO(__array_function__): could make np.diff return a Series
+        #  matching ser.diff()
+
+        ser = Series(np.arange(5))
+
+        res = np.diff(ser)
+        expected = np.array([1, 1, 1, 1])
+        tm.assert_numpy_array_equal(res, expected)
+
+    def test_diff_int(self):
+        # int dtype
+        a = 10000000000000000
+        b = a + 1
+        ser = Series([a, b])
+
+        result = ser.diff()
+        assert result[1] == 1
+
+    def test_diff_tz(self):
+        # Combined datetime diff, normal diff and boolean diff test
+        ts = Series(
+            np.arange(10, dtype=np.float64),
+            index=date_range("2020-01-01", periods=10),
+            name="ts",
+        )
+        ts.diff()
+
+        # neg n
+        result = ts.diff(-1)
+        expected = ts - ts.shift(-1)
+        tm.assert_series_equal(result, expected)
+
+        # 0
+        result = ts.diff(0)
+        expected = ts - ts
+        tm.assert_series_equal(result, expected)
+
+    def test_diff_dt64(self):
+        # datetime diff (GH#3100)
+        ser = Series(date_range("20130102", periods=5))
+        result = ser.diff()
+        expected = ser - ser.shift(1)
+        tm.assert_series_equal(result, expected)
+
+        # timedelta diff
+        result = result - result.shift(1)  # previous result
+        expected = expected.diff()  # previously expected
+        tm.assert_series_equal(result, expected)
+
+    def test_diff_dt64tz(self):
+        # with tz
+        ser = Series(
+            date_range("2000-01-01 09:00:00", periods=5, tz="US/Eastern"), name="foo"
+        )
+        result = ser.diff()
+        expected = Series(TimedeltaIndex(["NaT"] + ["1 days"] * 4), name="foo")
+        tm.assert_series_equal(result, expected)
+
+    @pytest.mark.parametrize(
+        "input,output,diff",
+        [([False, True, True, False, False], [np.nan, True, False, True, False], 1)],
+    )
+    def test_diff_bool(self, input, output, diff):
+        # boolean series (test for fixing #17294)
+        ser = Series(input)
+        result = ser.diff()
+        expected = Series(output)
+        tm.assert_series_equal(result, expected)
+
+    def test_diff_object_dtype(self):
+        # object series
+        ser = Series([False, True, 5.0, np.nan, True, False])
+        result = ser.diff()
+        expected = ser - ser.shift(1)
+        tm.assert_series_equal(result, expected)