pythoningLearning
diff --git a/‎opc/oxml.py‎
Lines changed: 24 additions & 0 deletions b/‎opc/oxml.py‎
Lines changed: 24 additions & 0 deletions
diff --git a/‎tests/test_oxml.py‎
Lines changed: 9 additions & 1 deletion b/‎tests/test_oxml.py‎
Lines changed: 9 additions & 1 deletion
diff --git a/‎tests/unitdata.py‎
Lines changed: 23 additions & 0 deletions b/‎tests/unitdata.py‎
Lines changed: 23 additions & 0 deletions
@@ -88,6 +88,28 @@ def extension(self):
         return self.get('Extension')
 
 
+class CT_Override(OxmlBaseElement):
+    """
+    ``<Override>`` element, specifying the content type to be applied for a
+    part with the specified partname.
+    """
+    @property
+    def content_type(self):
+        """
+        String held in the ``ContentType`` attribute of this ``<Override>``
+        element.
+        """
+        return self.get('ContentType')
+
+    @property
+    def partname(self):
+        """
+        String held in the ``PartName`` attribute of this ``<Override>``
+        element.
+        """
+        return self.get('PartName')
+
+
 class CT_Relationship(OxmlBaseElement):
     """
     ``<Relationship>`` element, representing a single relationship from a
@@ -129,5 +151,7 @@ def target_mode(self):
 
 ct_namespace = element_class_lookup.get_namespace(nsmap['ct'])
 ct_namespace['Default'] = CT_Default
+ct_namespace['Override'] = CT_Override
+
 pr_namespace = element_class_lookup.get_namespace(nsmap['pr'])
 pr_namespace['Relationship'] = CT_Relationship
@@ -11,7 +11,7 @@
 
 from opc.constants import RELATIONSHIP_TARGET_MODE as RTM
 
-from .unitdata import a_Default, a_Relationship
+from .unitdata import a_Default, an_Override, a_Relationship
 
 
 class DescribeCT_Default(object):
@@ -22,6 +22,14 @@ def it_provides_read_access_to_xml_values(self):
         assert default.content_type == 'application/xml'
 
 
+class DescribeCT_Override(object):
+
+    def it_provides_read_access_to_xml_values(self):
+        override = an_Override().element
+        assert override.partname == '/part/name.xml'
+        assert override.content_type == 'app/vnd.type'
+
+
 class DescribeCT_Relationship(object):
 
     def it_provides_read_access_to_xml_values(self):
 
@@ -41,6 +41,24 @@ def xml(self):
         return tmpl % (self._namespace, self._extension, self._content_type)
 
 
+class CT_OverrideBuilder(BaseBuilder):
+    """
+    Test data builder for CT_Override (Override) XML element that appears in
+    `[Content_Types].xml`.
+    """
+    def __init__(self):
+        """Establish instance variables with default values"""
+        self._content_type = 'app/vnd.type'
+        self._namespace = ' xmlns="%s"' % NS.OPC_CONTENT_TYPES
+        self._partname = '/part/name.xml'
+
+    @property
+    def xml(self):
+        """Return Override element"""
+        tmpl = '<Override%s PartName="%s" ContentType="%s"/>\n'
+        return tmpl % (self._namespace, self._partname, self._content_type)
+
+
 class CT_RelationshipBuilder(BaseBuilder):
     """
     Test data builder for CT_Relationship (Relationship) XML element that
@@ -73,6 +91,11 @@ def a_Default():
     return CT_DefaultBuilder()
 
 
+def an_Override():
+    """Return a CT_OverrideBuilder instance"""
+    return CT_OverrideBuilder()
+
+
 def a_Relationship():
     """Return a CT_RelationshipBuilder instance"""
     return CT_RelationshipBuilder()