Implement 2024 day 4

2024/tests/samples/04.1.txt

@@ -0,0 +1,5 @@
+..X...
+.SAMX.
+.A..A.
+XMAS.S
+.X....

2024/tests/samples/04.2.txt

@@ -0,0 +1,10 @@
+MMMSXXMASM
+MSAMXMSMSA
+AMXSXMAAMM
+MSAMASMSMX
+XMASAMXAMM
+XXAMMXXAMA
+SMSMSASXSS
+SAXAMASAAA
+MAMMMXMMMM
+MXMXAXMASX

2024/tests/test_day4.py

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+import os
+
+import pytest
+
+from aoc.days.day4 import DayRunner
+
+
+def get_data(which: int) -> str:
+    sample = os.path.dirname(__file__) + f"/samples/04.{which}.txt"
+    with open(sample, mode="rt", encoding="utf-8") as f:
+        return f.read()
+
+
+@pytest.mark.parametrize(
+    "input,answer",
+    [
+        (get_data(1), 4),
+        (get_data(2), 18),
+    ],
+)
+def test_sample_part1(input: str, answer: int) -> None:
+    assert DayRunner.part1(input) == answer
+
+
+def test_sample_part2() -> None:
+    assert DayRunner.part2(get_data(2)) == 9