Add test asserting that install_requires parameters cannot be unordered. Ref #458.

setuptools/tests/test_egg_info.py

@@ -244,20 +244,6 @@ class TestEggInfo(object):
         pytz
         ''',
 
-        '''
-        install_requires_set_deterministic
-
-        install_requires={{"fake-factory==0.5.2", "pytz"}}
-
-        [options]
-        install_requires =
-            fake-factory==0.5.2
-            pytz
-
-        fake-factory==0.5.2
-        pytz
-        ''',
-
         '''
         install_requires_with_marker
 
@@ -407,6 +393,17 @@ class TestEggInfo(object):
         assert install_requires.lstrip() == expected_requires
         assert glob.glob(os.path.join(env.paths['lib'], 'barbazquux*')) == []
 
+    def test_install_requires_unordered_disallowed(self, tmpdir_cwd, env):
+        """
+        Packages that pass unordered install_requires sequences
+        should be rejected as they produce non-deterministic
+        builds. See #458.
+        """
+        req = 'install_requires={"fake-factory==0.5.2", "pytz"}'
+        self._setup_script_with_requires(req)
+        with pytest.raises(AssertionError):
+            self._run_install_command(tmpdir_cwd, env)
+
     def test_extras_require_with_invalid_marker(self, tmpdir_cwd, env):
         tmpl = 'extras_require={{":{marker}": ["barbazquux"]}},'
         req = tmpl.format(marker=self.invalid_marker)