Add one more line of coverage...

opine/tests/functional.py

@@ -17,17 +17,18 @@
 
 class FunctionalTest(unittest.TestCase):
     def _run_and_get_output(
-        self, args: List[str], extra_files: Optional[Dict[str, str]] = None
+        self, args: List[str], extra_files: Optional[Dict[str, Optional[str]]] = None
     ) -> Tuple[Result, Dict[str, str]]:
         with tempfile.TemporaryDirectory() as d:
             td_path = Path(d)
-            self.files: Dict[str, str] = {}
+            self.files: Dict[str, Optional[str]] = {}
             self.files.update(SAMPLE_ENV)
             if extra_files:
                 self.files.update(extra_files)
 
             for filename, contents in self.files.items():
-                (td_path / filename).write_text(contents)
+                if contents is not None:
+                    (td_path / filename).write_text(contents)
 
             runner = CliRunner()
             result = runner.invoke(main, args + [d])
@@ -70,6 +71,12 @@ def test_smoke_exception_verbose(self) -> None:
         self.assertIn("ParserSyntaxError: Syntax Error", result.output)
         self.assertIn("Traceback (most recent call last)", result.output)
 
+    def test_smoke_skip(self) -> None:
+        result, files = self._run_and_get_output(["-v"], {"setup.py": "pass"})
+        self.assertEqual(2, result.exit_code)
+        self.assertEqual(self.files, files)
+        self.assertIn("Could not find setup() call in setup.py", result.output)
+
     def test_smoke_write(self) -> None:
         result, files = self._run_and_get_output(["-a"])
         self.assertEqual(0, result.exit_code)
@@ -100,3 +107,8 @@ def test_smoke_write(self) -> None:
 """,
             files["setup.cfg"],
         )
+
+    def test_smoke_noop(self) -> None:
+        result, files = self._run_and_get_output(
+            ["-a"], extra_files={"coverage.ini": None}
+        )

setup.cfg

@@ -23,6 +23,7 @@ install_requires =
   imperfect>=0.2.0
   moreorless>=0.3.0
   tomlkit>=0.5.0
+  setuptools >= 38.3.0
 
 [options.entry_points]
 console_scripts =
@@ -54,22 +55,34 @@ use_parentheses = True
 ignore_missing_imports = True
 
 [tox:tox]
-envlist = py38-minimal, py38, py39, py310, py311, py312
+envlist = py38-minimal, py38, py39, py310, py311, py312, coverage
 
 [testenv]
-deps = -rrequirements-dev.txt
-whitelist_externals = make
+deps =
+    -rrequirements-dev.txt
+allowlist_externals = make
 commands =
     make test
 setenv =
-    py3*: COVERAGE_FILE={envdir}/.coverage
+    py{38,39,310,311,312}: COVERAGE_FILE={toxworkdir}/.coverage.{envname}
+usedevelop = True
+depends =
+  coverage: py{38,39,310,311,312}
 
 [testenv:py38-minimal]
 deps =
 changedir = /
 commands =
     python -m opine.tests
 
+[testenv:coverage]
+setenv = COVERAGE_FILE={toxworkdir}/.coverage
+skip_install = True
+deps = coverage
+commands =
+    coverage combine
+    coverage report -m
+
 [flake8]
 ignore = E203, E231, E266, E302, E501, W503
 max-line-length = 88