Adding day 02 (probably will rewrite in a bit)

inputs/day02-example1.txt

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+forward 5
+down 5
+forward 8
+up 3
+down 8
+forward 2

puzzles/day02.py

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+"""
+Advent of Code 2021 - Day 02
+
+Run with:
+    python puzzles/day02.py inputs/day02.txt
+"""
+
+import pathlib
+import sys
+from typing import List, Tuple
+
+def part1(inputs: List[int], horizontal: int=0, depth: int=0) -> int:
+    for line in inputs:
+        step = line.split()
+        if step[0] == "forward":
+            horizontal += int(step[1])
+        elif step[0] == "up":
+            depth -= int(step[1])
+        elif step[0] == "down":
+            depth += int(step[1])
+    return horizontal * depth
+
+
+def part2(inputs: List[int], horizontal: int=0, depth: int=0, aim: int=0) -> int:
+    for line in inputs:
+        step = line.split()
+        if step[0] == "forward":
+            horizontal += int(step[1])
+            depth += aim * int(step[1])
+        elif step[0] == "up":
+            aim -= int(step[1])
+        elif step[0] == "down":
+            aim += int(step[1])
+    return horizontal * depth
+
+
+def parse(inputs: str) -> List[List[str]]:
+    """Parse the input string"""
+    return inputs.split("\n")
+
+
+def solve(path: str) -> Tuple[int, int]:
+    """Solve the puzzle"""
+    puzzle_input = parse(pathlib.Path(path).read_text().strip())
+    part1_result = part1(puzzle_input)
+    part2_result = part2(puzzle_input)
+
+    return part1_result, part2_result
+
+
+def main() -> None:
+    for path in sys.argv[1:]:
+        print(f"Input File: {path}")
+
+        part1_result, part2_result = solve(path)
+
+        print(f"Part 1 Result: {part1_result}")
+        print(f"Part 2 Result: {part2_result}")
+
+if __name__ == "__main__":
+    main()

puzzles/test_day02.py

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+import pathlib
+import pytest
+import day02 as aoc
+
+INPUTS_DIR = f"{pathlib.Path(__file__).parent.parent}/inputs"
+
+@pytest.fixture
+def example_data():
+    input_path = f"{INPUTS_DIR}/day02-example1.txt"
+    return aoc.parse(pathlib.Path(input_path).read_text().strip())
+
+
+@pytest.fixture
+def day02_data():
+    input_path = f"{INPUTS_DIR}/day02.txt"
+    return aoc.parse(pathlib.Path(input_path).read_text().strip())
+
+
+def test_example1(example_data):
+    assert aoc.part1(example_data) == 150
+
+
+def test_example2(example_data):
+    assert aoc.part2(example_data) == 900
+
+
+def test_part1(day02_data):
+    assert aoc.part1(day02_data) == 1670340
+
+
+def test_part2(day02_data):
+    assert aoc.part2(day02_data) == 1954293920