Add in a test that checks comparsion of Requirement with markers

pkg_resources/tests/test_resources.py

@@ -509,6 +509,28 @@ class TestParsing:
         with pytest.raises(ValueError):
             Requirement.parse("#")
 
+    def test_requirements_with_markers(self):
+        assert (
+            Requirement.parse("foobar;os_name=='a'")
+            ==
+            Requirement.parse("foobar;os_name=='a'")
+        )
+        assert (
+            Requirement.parse("name==1.1;python_version=='2.7'")
+            !=
+            Requirement.parse("name==1.1;python_version=='3.3'")
+        )
+        assert (
+            Requirement.parse("name==1.0;python_version=='2.7'")
+            !=
+            Requirement.parse("name==1.2;python_version=='2.7'")
+        )
+        assert (
+            Requirement.parse("name[foo]==1.0;python_version=='3.3'")
+            !=
+            Requirement.parse("name[foo,bar]==1.0;python_version=='3.3'")
+        )
+
     def test_local_version(self):
         req, = parse_requirements('foo==1.0.org1')