Add test to check subpackage is included in build

Author: sverhoeven

tests/test_project.py

@@ -2,6 +2,8 @@
 import subprocess
 import shlex
 
+import pytest
+
 
 def test_project_folder(cookies):
     project = cookies.bake()
@@ -20,17 +22,32 @@ def run(command: str, dirpath: os.PathLike) -> subprocess.CompletedProcess:
                           encoding="utf-8")
 
 
-def test_pytest(cookies):
+@pytest.fixture
+def baked_withdevdeps(cookies):
     result = cookies.bake()
     env_output = run('python3 -m venv env', result.project)
     assert env_output.returncode == 0
     latest_pip_output = run('env/bin/pip3 install --upgrade pip setuptools', result.project)
     assert latest_pip_output.returncode == 0
     pip_output = run('env/bin/pip3 install --editable .[dev]', result.project)
     assert pip_output.returncode == 0
+    return result.project
+
 
-    pytest_output = run('env/bin/pytest', result.project)
+def test_pytest(baked_withdevdeps):
+    project_dir = baked_withdevdeps
+    pytest_output = run('env/bin/pytest', project_dir)
     assert pytest_output.returncode == 0
-    assert '== 3 passed in' in  pytest_output.stdout
-    assert (result.project / 'coverage.xml').exists()
-    assert (result.project / 'htmlcov/index.html').exists()
+    assert '== 3 passed in' in pytest_output.stdout
+    assert (project_dir / 'coverage.xml').exists()
+    assert (project_dir / 'htmlcov/index.html').exists()
+
+
+def test_subpackage(baked_withdevdeps):
+    project_dir = baked_withdevdeps
+    subpackage = (project_dir / 'my_python_package' / 'mysub')
+    subpackage.mkdir()
+    (subpackage / '__init__.py').write_text('FOO = "bar"', encoding="utf-8")
+    build_output = run('python3 setup.py build', project_dir)
+    assert build_output.returncode == 0
+    assert (project_dir / 'build' / 'lib' / 'my_python_package' / 'mysub' / '__init__.py').exists()