Add a sitemap.txt for popular public repos

and reference it from the robots.txt

test/test_repomodel.py

@@ -0,0 +1,37 @@
+import unittest
+from datetime import timedelta
+
+from app import app
+from initdb import setup_database_for_testing, finished_database_for_testing
+from data import model
+
+
+PUBLIC_USERNAME = 'public'
+PUBLIC_REPONAME = 'publicrepo'
+
+
+class TestRepoModel(unittest.TestCase):
+  def setUp(self):
+    setup_database_for_testing(self)
+
+    self.app = app.test_client()
+    self.ctx = app.test_request_context()
+    self.ctx.__enter__()
+
+  def tearDown(self):
+    finished_database_for_testing(self)
+    self.ctx.__exit__(True, None, None)
+
+  def test_popular_repo_list(self):
+    # Our repository action count table should have 1 event for the only public
+    # repo.
+    onlypublic = model.repository.list_popular_public_repos(0, timedelta(weeks=1))
+    self.assertEquals(len(onlypublic), 1)
+    self.assertEquals(onlypublic[0], (PUBLIC_USERNAME, PUBLIC_REPONAME))
+
+    self.assertEquals(len(model.repository.list_popular_public_repos(1, timedelta(weeks=1))), 1)
+    self.assertEquals(len(model.repository.list_popular_public_repos(50, timedelta(weeks=1))), 0)
+
+
+if __name__ == '__main__':
+  unittest.main()