I am done

rl/Lib/site-packages/setuptools/tests/test_build.py

@@ -0,0 +1,33 @@
+from setuptools import Command
+from setuptools.command.build import build
+from setuptools.dist import Distribution
+
+
+def test_distribution_gives_setuptools_build_obj(tmpdir_cwd):
+    """
+    Check that the setuptools Distribution uses the
+    setuptools specific build object.
+    """
+
+    dist = Distribution(
+        dict(
+            script_name='setup.py',
+            script_args=['build'],
+            packages=[],
+            package_data={'': ['path/*']},
+        )
+    )
+    assert isinstance(dist.get_command_obj("build"), build)
+
+
+class Subcommand(Command):
+    """Dummy command to be used in tests"""
+
+    def initialize_options(self):
+        pass
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        raise NotImplementedError("just to check if the command runs")