adds test for page impersonation

tests/unit/test_utils.py

@@ -0,0 +1,21 @@
+import pytest
+
+from personalisation.utils import impersonate_other_page
+
+class Page(object):
+    def __init__(self, path, depth, url_path, title):
+        self.path = path
+        self.depth = depth
+        self.url_path = url_path
+        self.title = title
+
+    def __eq__(self, other):
+        return self.__dict__ == other.__dict__
+
+def test_impersonate_other_page():
+    page = Page(path="/", depth=0, url_path="/", title="Hoi")
+    other_page = Page(path="/other", depth=1, url_path="/other", title="Doei")
+
+    impersonate_other_page(page, other_page)
+
+    assert page == other_page