add linting and testing with nox

.flake8

@@ -3,7 +3,7 @@ select = ANN,B,B9,BLK,C,D,DAR,E,F,I,S,W
 ignore = E203,E501,W503
 max-line-length = 120
 max-complexity = 10
-application-import-names = hypermodern_python,tests
+application-import-names = cf2tf,tests
 import-order-style = google
 docstring-convention = google
 per-file-ignores = tests/*:S101

mypy.ini

@@ -0,0 +1,7 @@
+[mypy]
+
+[mypy-nox.*]
+ignore_missing_imports = True
+
+[mypy-click_log.*]
+ignore_missing_imports = True

noxfile.py

@@ -0,0 +1,90 @@
+"""Nox sessions."""
+
+import nox
+import sys
+from pathlib import Path
+
+from textwrap import dedent
+
+try:
+    from nox_poetry import Session
+    from nox_poetry import session
+except ImportError:
+    message = f"""\
+    Nox failed to import the 'nox-poetry' package.
+    Please install it using the following command:
+    {sys.executable} -m pip install nox-poetry"""
+    raise SystemExit(dedent(message)) from None
+
+
+python_versions = ["3.10", "3.9", "3.8", "3.7"]
+
+nox.options.sessions = (
+    # "pre-commit",
+    # "safety",
+    # "mypy",
+    "black",
+    "lint",
+    "mypy",
+    "tests",
+    # "typeguard",
+    # "xdoctest",
+    # "docs-build",
+)
+
+locations = "src", "tests", "noxfile.py"
+
+
+@session(python=python_versions[1])
+def black(session):
+    args = session.posargs or locations
+    session.install("black")
+    session.run("black", *args)
+
+
+@session(python=python_versions[1])
+def lint(session):
+    args = session.posargs or locations
+    session.install("flake8")
+    session.run("flake8", *args)
+
+
+@session(python=python_versions[1])
+def mypy(session: Session) -> None:
+    """Type-check using mypy."""
+    args = session.posargs or [
+        "--install-types",
+        "--non-interactive",
+        "src",
+        "tests",
+    ]
+    session.install(".")
+    session.install("mypy", "pytest")
+    session.run("mypy", *args)
+    if not session.posargs:
+        session.run("mypy", f"--python-executable={sys.executable}", "noxfile.py")
+
+
+@session(python=python_versions)
+def tests(session: Session) -> None:
+    """Run the test suite."""
+    session.install(".")
+    session.install("coverage[toml]", "pytest", "pygments")
+    try:
+        session.run("coverage", "run", "--parallel", "-m", "pytest", *session.posargs)
+    finally:
+        if session.interactive:
+            session.notify("coverage", posargs=[])
+
+
+@session(python=python_versions[1])
+def coverage(session: Session) -> None:
+    """Produce the coverage report."""
+    args = session.posargs or ["report"]
+
+    session.install("coverage[toml]")
+
+    if not session.posargs and any(Path().glob(".coverage.*")):
+        session.run("coverage", "combine")
+
+    session.run("coverage", *args)