pythoningLearning
diff --git a/‎opc/phys_pkg.py‎
Lines changed: 7 additions & 0 deletions b/‎opc/phys_pkg.py‎
Lines changed: 7 additions & 0 deletions
diff --git a/‎tests/test_phys_pkg.py‎
Lines changed: 6 additions & 0 deletions b/‎tests/test_phys_pkg.py‎
Lines changed: 6 additions & 0 deletions
@@ -32,6 +32,13 @@ def __init__(self, pkg_file):
         super(ZipPkgReader, self).__init__()
         self._zipf = ZipFile(pkg_file, 'r')
 
+    def blob_for(self, pack_uri):
+        """
+        Return blob corresponding to *pack_uri*. Raises |ValueError| if no
+        matching member is present in zip archive.
+        """
+        return self._zipf.read(pack_uri.membername)
+
     def close(self):
         """
         Close the zip archive, releasing any resources it is using.
 
@@ -67,6 +67,12 @@ def it_can_be_closed(self, ZipFile_):
         # verify -----------------------
         zipf.close.assert_called_once_with()
 
+    def it_can_retrieve_the_blob_for_a_pack_uri(self, phys_reader):
+        pack_uri = PackURI('/ppt/presentation.xml')
+        blob = phys_reader.blob_for(pack_uri)
+        sha1 = hashlib.sha1(blob).hexdigest()
+        assert sha1 == 'efa7bee0ac72464903a67a6744c1169035d52a54'
+
     def it_has_the_content_types_xml(self, phys_reader):
         sha1 = hashlib.sha1(phys_reader.content_types_xml).hexdigest()
         assert sha1 == '9604a4fb3bf9626f5ad59a4e82029b3a501f106a'