Add cli application

.github/workflows/lint.yml

@@ -19,6 +19,8 @@ jobs:
           python-version: "3.11"
       - name: Install test requirements
         run: pip install -r dev-requirements.txt
+      - name: Install tdd_workshop
+        run: pip install .
       - name: Check black
         run: black --check .
       - name: Check typing

setup.py

@@ -17,8 +17,11 @@
         "Programming Language :: Python :: 3.11",
         "Topic :: Learning :: Software Test",
     ],
+    entry_points={
+        "console_scripts": ["treasure-hunt=tdd_workshop.cli:main"],
+    },
     packages=find_packages(where="src", exclude=["tests"]),
     package_dir={"": "src"},
-    install_requires=[],
+    install_requires=["click"],
     test_suite="tests",
 )

src/tdd_workshop/cli.py

@@ -0,0 +1,9 @@
+import click
+from tdd_workshop.io import read_coordinates  # type: ignore
+
+
+@click.command()
+@click.argument("file_name", type=click.Path(exists=True))
+def main(file_name: str) -> None:
+    coordinates = read_coordinates(file_name)
+    print(f"Read file: {file_name}, coordinates: {coordinates}")

tests/unit/test_cli.py

@@ -0,0 +1,27 @@
+from click.testing import CliRunner
+
+from src.tdd_workshop.cli import main
+
+
+def test_that_cli_fails_when_file_is_missing():
+    runner = CliRunner()
+    result = runner.invoke(main, ["not_a_file"])
+    assert result.exit_code != 0
+    assert " Path 'not_a_file' does not exist" in result.output
+
+
+def test_that_cli_prints_coordinates(monkeypatch, tmp_path):
+    monkeypatch.chdir(tmp_path)
+    expected_coordinates_list = [
+        ("2.0", "1.9"),
+        ("2.5", "1.5"),
+        ("3.3", "7.3"),
+    ]
+    with open("test_input", "w", encoding="utf-8") as fout:
+        fout.write("\n".join(",".join(coords) for coords in expected_coordinates_list))
+    runner = CliRunner()
+    result = runner.invoke(main, ["test_input"])
+    assert result.exit_code == 0
+    assert (
+        "coordinates: [('2.0', '1.9'), ('2.5', '1.5'), ('3.3', '7.3')]" in result.output
+    )