Dateien und Ordner mit pathlib

from pathlib import Path


def count_by_suffix(folder: Path) -> dict[str, int]:
    counts: dict[str, int] = {}
    # Look at every file in folder and count its suffix.
    return counts


if __name__ == "__main__":
    print(count_by_suffix(Path(".")))

from pathlib import Path

from main import count_by_suffix


def make(folder, names):
    root = Path(folder)
    root.mkdir(exist_ok=True)
    for name in names:
        (root / name).write_text("x", encoding="utf-8")
    return root


def test_counts():
    """Zwei .txt-Dateien, eine .csv und eine Datei ohne Endung"""
    root = make("t_counts", ["a.txt", "b.txt", "c.csv", "README"])
    got = count_by_suffix(root)
    assert got == {".txt": 2, ".csv": 1, "": 1}, f"count_by_suffix gab {got!r} zurück"


def test_skips_folders():
    """Unterordner und die Dateien darin werden nicht gezählt"""
    root = make("t_folders", ["a.txt"])
    (root / "sub").mkdir(exist_ok=True)
    (root / "sub" / "b.txt").write_text("x", encoding="utf-8")
    got = count_by_suffix(root)
    assert got == {".txt": 1}, f"mit a.txt und sub/b.txt gab count_by_suffix {got!r} zurück, erwartet {{'.txt': 1}}"


def test_empty():
    """Ein leerer Ordner ergibt ein leeres dict"""
    root = make("t_empty", [])
    got = count_by_suffix(root)
    assert got == {}, f"für einen leeren Ordner gab count_by_suffix {got!r} zurück"

from pathlib import Path


def save_report(base: Path, year: int, title: str, text: str) -> Path:
    path = base / str(year) / (title + ".md")
    path.write_text(text, encoding="utf-8")
    return path


def report_titles(base: Path, year: int) -> list[str]:
    return []


if __name__ == "__main__":
    save_report(Path("reports"), 2026, "september", "All good.")
    print(report_titles(Path("reports"), 2026))

from pathlib import Path

from main import report_titles, save_report


def test_saves_file():
    """save_report legt die Ordner an und schreibt den Text"""
    path = save_report(Path("t_save") / "reports", 2026, "may", "Sales up.")
    assert path == Path("t_save/reports/2026/may.md"), f"save_report gab {path!r} zurück"
    text = path.read_text(encoding="utf-8")
    assert text == "Sales up.", f"die Datei enthält {text!r}, erwartet 'Sales up.'"


def test_save_twice():
    """Ein zweiter Bericht im selben Jahr lässt sich speichern"""
    base = Path("t_twice")
    save_report(base, 2025, "one", "1")
    save_report(base, 2025, "two", "2")
    got = (base / "2025" / "two.md").read_text(encoding="utf-8")
    assert got == "2", f"der zweite Bericht enthält {got!r}, erwartet '2'"


def test_titles_sorted():
    """report_titles listet nur .md-Dateien, sortiert und ohne .md"""
    base = Path("t_titles")
    for title in ["march", "april", "june"]:
        save_report(base, 2024, title, "x")
    (base / "2024" / "notes.txt").write_text("x", encoding="utf-8")
    got = report_titles(base, 2024)
    assert got == ["april", "june", "march"], f"report_titles gab {got!r} zurück"


def test_missing_year():
    """Ein Jahr ohne Ordner ergibt []"""
    got = report_titles(Path("t_missing"), 1999)
    assert got == [], f"für einen fehlenden Ordner gab report_titles {got!r} zurück"