Add page test

tests/test_page.py

@@ -0,0 +1,20 @@
+from fbchat._page import Page
+
+
+def test_page_from_graphql():
+    data = {
+        "id": "123456",
+        "name": "Some school",
+        "profile_picture": {"uri": "https://scontent-arn2-1.xx.fbcdn.net/v/..."},
+        "url": "https://www.facebook.com/some-school/",
+        "category_type": "SCHOOL",
+        "city": None,
+    }
+    assert Page(
+        uid="123456",
+        photo="https://scontent-arn2-1.xx.fbcdn.net/v/...",
+        name="Some school",
+        url="https://www.facebook.com/some-school/",
+        city=None,
+        category="SCHOOL",
+    ) == Page._from_graphql(data)