tests: improve integration coverage for pep517

This change adds coverage for the following.
- pip wheel build
- pep517 compliance checks
- pep517 builds for sdists and wheels
- pip install with --no-binary :all:

tests/conftest.py

@@ -3,6 +3,7 @@
 import pytest
 
 from poetry.core.utils._compat import Path
+from tests.utils import tempfile
 
 
 def pytest_addoption(parser):
@@ -32,23 +33,39 @@ def get(name):  # type: (str) -> Path
     return get
 
 
-@pytest.fixture
-def common_fixtures_directory():  # type: () -> Path
-    return Path(__file__).parent / "fixtures"
+@pytest.fixture(scope="session")
+def project_source_root():  # type: () -> Path
+    return Path(__file__).parent.parent
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
+def project_source_test_root():  # type: () -> Path
+    return Path(__file__).parent
+
+
+@pytest.fixture(scope="session")
+def common_fixtures_directory(project_source_test_root):  # type: (Path) -> Path
+    return project_source_test_root / "fixtures"
+
+
+@pytest.fixture(scope="session")
 def common_project(common_fixtures_directory):  # type: (Path) -> Callable[[str], Path]
     return get_project_from_dir(common_fixtures_directory)
 
 
-@pytest.fixture
-def masonry_fixtures_directory():  # type: () -> Path
-    return Path(__file__).parent / "masonry" / "builders" / "fixtures"
+@pytest.fixture(scope="session")
+def masonry_fixtures_directory(project_source_test_root):  # type: (Path) -> Path
+    return project_source_test_root / "masonry" / "builders" / "fixtures"
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 def masonry_project(
     masonry_fixtures_directory,
 ):  # type: (Path) -> Callable[[str], Path]
     return get_project_from_dir(masonry_fixtures_directory)
+
+
+@pytest.fixture
+def temporary_directory():  # type: () -> Path
+    with tempfile.TemporaryDirectory(prefix="poetry-core") as tmp:
+        yield Path(tmp)

tests/integration/test_pep517.py

@@ -1,6 +1,13 @@
+import sys
+
+from pathlib import Path
+
 import pytest
 
+from pep517.build import build
 from pep517.check import check
+from poetry.core.utils._compat import PY35
+from tests.utils import subprocess_run
 from tests.utils import temporary_project_directory
 
 
@@ -15,6 +22,60 @@
         ("masonry_project", "disable_setup_py"),
     ],
 )
-def test_pep517_check(request, getter, project):
+def test_pep517_check_poetry_managed(request, getter, project):
     with temporary_project_directory(request.getfixturevalue(getter)(project)) as path:
         assert check(path)
+
+
+def test_pep517_check(project_source_root):
+    assert check(str(project_source_root))
+
+
+def test_pep517_build_sdist(temporary_directory, project_source_root):
+    build(
+        source_dir=str(project_source_root), dist="sdist", dest=str(temporary_directory)
+    )
+    distributions = list(temporary_directory.glob("poetry-core-*.tar.gz"))
+    assert len(distributions) == 1
+
+
+def test_pep517_build_wheel(temporary_directory, project_source_root):
+    build(
+        source_dir=str(project_source_root), dist="wheel", dest=str(temporary_directory)
+    )
+    distributions = list(temporary_directory.glob("poetry_core-*-none-any.whl"))
+    assert len(distributions) == 1
+
+
+def test_pip_wheel_build(temporary_directory, project_source_root):
+    tmp = str(temporary_directory)
+    pip = subprocess_run(
+        "pip", "wheel", "--use-pep517", "-w", tmp, str(project_source_root)
+    )
+    assert "Successfully built poetry-core" in pip.stdout
+
+    assert pip.returncode == 0
+
+    wheels = list(Path(tmp).glob("poetry_core-*-none-any.whl"))
+    assert len(wheels) == 1
+
+
+@pytest.mark.skipif(not PY35, reason="This test uses the python built-in venv module.")
+def test_pip_install_no_binary(temporary_directory, project_source_root):
+    venv_dir = temporary_directory / ".venv"
+    venv_python = venv_dir / "bin" / "python"
+
+    subprocess_run(sys.executable, "-m", "venv", str(venv_dir))
+    subprocess_run(str(venv_python), "-m", "pip", "install", "--upgrade", "pip")
+    subprocess_run(
+        str(venv_python),
+        "-m",
+        "pip",
+        "install",
+        "--no-binary",
+        ":all:",
+        str(project_source_root),
+    )
+
+    pip_show = subprocess_run(str(venv_python), "-m", "pip", "show", "poetry-core")
+    assert "Name: poetry-core" in pip_show.stdout

tests/utils.py

@@ -1,4 +1,5 @@
 import shutil
+import subprocess
 
 from contextlib import contextmanager
 from typing import Any
@@ -50,3 +51,14 @@ def temporary_project_directory(
         data.update(toml_patch or __toml_build_backend_patch__)
         toml.write(data)
         yield str(dst)
+
+
+def subprocess_run(*args, **kwargs):  # type: (str, Any) -> subprocess.CompletedProcess
+    """
+    Helper method to run a subprocess. Asserts for success.
+    """
+    result = subprocess.run(
+        args, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, **kwargs
+    )
+    assert result.returncode == 0
+    return result