1 files changed, 126 insertions, 0 deletions
diff --git a/setuptools/tests/test_build_meta.py b/setuptools/tests/test_build_meta.py
new file mode 100644
index 0000000..659c1a6
--- /dev/null
+++ b/setuptools/tests/test_build_meta.py
@@ -0,0 +1,126 @@
+import os
+
+import pytest
+
+from .files import build_files
+from .textwrap import DALS
+
+
+futures = pytest.importorskip('concurrent.futures')
+importlib = pytest.importorskip('importlib')
+
+
+class BuildBackendBase(object):
+    def __init__(self, cwd=None, env={}, backend_name='setuptools.build_meta'):
+        self.cwd = cwd
+        self.env = env
+        self.backend_name = backend_name
+
+
+class BuildBackend(BuildBackendBase):
+    """PEP 517 Build Backend"""
+    def __init__(self, *args, **kwargs):
+        super(BuildBackend, self).__init__(*args, **kwargs)
+        self.pool = futures.ProcessPoolExecutor()
+
+    def __getattr__(self, name):
+        """Handles aribrary function invocations on the build backend."""
+        def method(*args, **kw):
+            root = os.path.abspath(self.cwd)
+            caller = BuildBackendCaller(root, self.env, self.backend_name)
+            return self.pool.submit(caller, name, *args, **kw).result()
+
+        return method
+
+
+class BuildBackendCaller(BuildBackendBase):
+    def __call__(self, name, *args, **kw):
+        """Handles aribrary function invocations on the build backend."""
+        os.chdir(self.cwd)
+        os.environ.update(self.env)
+        mod = importlib.import_module(self.backend_name)
+        return getattr(mod, name)(*args, **kw)
+
+
+defns = [{
+            'setup.py': DALS("""
+                __import__('setuptools').setup(
+                    name='foo',
+                    py_modules=['hello'],
+                    setup_requires=['six'],
+                )
+                """),
+            'hello.py': DALS("""
+                def run():
+                    print('hello')
+                """),
+        },
+        {
+            'setup.py': DALS("""
+                assert __name__ == '__main__'
+                __import__('setuptools').setup(
+                    name='foo',
+                    py_modules=['hello'],
+                    setup_requires=['six'],
+                )
+                """),
+            'hello.py': DALS("""
+                def run():
+                    print('hello')
+                """),
+        },
+        {
+            'setup.py': DALS("""
+                variable = True
+                def function():
+                    return variable
+                assert variable
+                __import__('setuptools').setup(
+                    name='foo',
+                    py_modules=['hello'],
+                    setup_requires=['six'],
+                )
+                """),
+            'hello.py': DALS("""
+                def run():
+                    print('hello')
+                """),
+        }]
+
+
+@pytest.fixture(params=defns)
+def build_backend(tmpdir, request):
+    build_files(request.param, prefix=str(tmpdir))
+    with tmpdir.as_cwd():
+        yield BuildBackend(cwd='.')
+
+
+def test_get_requires_for_build_wheel(build_backend):
+    actual = build_backend.get_requires_for_build_wheel()
+    expected = ['six', 'setuptools', 'wheel']
+    assert sorted(actual) == sorted(expected)
+
+
+def test_build_wheel(build_backend):
+    dist_dir = os.path.abspath('pip-wheel')
+    os.makedirs(dist_dir)
+    wheel_name = build_backend.build_wheel(dist_dir)
+
+    assert os.path.isfile(os.path.join(dist_dir, wheel_name))
+
+
+def test_build_sdist(build_backend):
+    dist_dir = os.path.abspath('pip-sdist')
+    os.makedirs(dist_dir)
+    sdist_name = build_backend.build_sdist(dist_dir)
+
+    assert os.path.isfile(os.path.join(dist_dir, sdist_name))
+
+
+def test_prepare_metadata_for_build_wheel(build_backend):
+    dist_dir = os.path.abspath('pip-dist-info')
+    os.makedirs(dist_dir)
+
+    dist_info = build_backend.prepare_metadata_for_build_wheel(dist_dir)
+
+    assert os.path.isfile(os.path.join(dist_dir, dist_info, 'METADATA'))