--- a/ckanext/dga_stats/tests/test_stats_lib.py
+++ b/ckanext/dga_stats/tests/test_stats_lib.py
@@ -1,1 +1,139 @@
+import datetime
+from nose.tools import assert_equal
 
+from ckan.lib.create_test_data import CreateTestData
+from ckan import model
+
+from ckanext.dga_stats.stats import Stats, RevisionStats
+from ckanext.dga_stats.tests import StatsFixture
+
+class TestStatsPlugin(StatsFixture):
+    @classmethod
+    def setup_class(cls):
+        super(TestStatsPlugin, cls).setup_class()
+
+        CreateTestData.create_arbitrary([
+            {'name':'test1', 'groups':['grp1'], 'tags':['tag1']},
+            {'name':'test2', 'groups':['grp1', 'grp2'], 'tags':['tag1']},
+            {'name':'test3', 'groups':['grp1', 'grp2'], 'tags':['tag1', 'tag2']},
+            {'name':'test4'},
+            ],
+            extra_user_names=['bob'],
+            admins=['bob'],
+            )
+        # hack revision timestamps to be this date
+        week1 = datetime.datetime(2011, 1, 5)
+        for rev in model.Session.query(model.Revision):
+            rev.timestamp = week1 + datetime.timedelta(seconds=1)
+
+        # week 2
+        rev = model.repo.new_revision() 
+        rev.author = 'bob'
+        rev.timestamp = datetime.datetime(2011, 1, 12)
+        model.Package.by_name(u'test2').delete()
+        model.repo.commit_and_remove()
+
+        # week 3
+        rev = model.repo.new_revision() 
+        rev.author = 'sandra'
+        rev.timestamp = datetime.datetime(2011, 1, 19)
+        model.Package.by_name(u'test3').title = 'Test 3'
+        model.repo.commit_and_remove()
+        rev = model.repo.new_revision() 
+        rev.author = 'sandra'
+        rev.timestamp = datetime.datetime(2011, 1, 20)
+        model.Package.by_name(u'test4').title = 'Test 4'
+        model.repo.commit_and_remove()
+
+        # week 4
+        rev = model.repo.new_revision() 
+        rev.author = 'bob'
+        rev.timestamp = datetime.datetime(2011, 1, 26)
+        model.Package.by_name(u'test3').notes = 'Test 3 notes'
+        model.repo.commit_and_remove()
+
+    @classmethod
+    def teardown_class(cls):
+        CreateTestData.delete()
+        
+    def test_top_rated_packages(self):
+        pkgs = Stats.top_rated_packages()
+        assert pkgs == []
+
+    def test_most_edited_packages(self):
+        pkgs = Stats.most_edited_packages()
+        pkgs = [(pkg.name, count) for pkg, count in pkgs]
+        assert_equal(pkgs[0], ('test3', 3))
+        assert_equal(pkgs[1][1], 2) 
+        assert_equal(pkgs[2][1], 2) 
+        assert_equal(pkgs[3], ('test1', 1)) 
+
+    def test_largest_groups(self):
+        grps = Stats.largest_groups()
+        grps = [(grp.name, count) for grp, count in grps]
+        assert_equal(grps, [('grp1', 3),
+                            ('grp2', 2)])
+
+    def test_top_tags(self):
+        tags = Stats.top_tags()
+        tags = [(tag.name, count) for tag, count in tags]
+        assert_equal(tags, [('tag1', 3),
+                            ('tag2', 1)])
+
+    def test_top_package_owners(self):
+        owners = Stats.top_package_owners()
+        owners = [(owner.name, count) for owner, count in owners]
+        assert_equal(owners, [('bob', 4)])
+
+    def test_new_packages_by_week(self):
+        new_packages_by_week = RevisionStats.get_by_week('new_packages')
+        def get_results(week_number):
+            date, ids, num, cumulative = new_packages_by_week[week_number]
+            return (date, set([model.Session.query(model.Package).get(id).name for id in ids]), num, cumulative)
+        assert_equal(get_results(0),
+                     ('2011-01-03', set((u'test1', u'test2', u'test3', u'test4')), 4, 4))
+        assert_equal(get_results(1),
+                     ('2011-01-10', set([]), 0, 4))
+        assert_equal(get_results(2),
+                     ('2011-01-17', set([]), 0, 4))
+        assert_equal(get_results(3),
+                     ('2011-01-24', set([]), 0, 4))
+        
+    def test_deleted_packages_by_week(self):
+        deleted_packages_by_week = RevisionStats.get_by_week('deleted_packages')
+        def get_results(week_number):
+            date, ids, num, cumulative = deleted_packages_by_week[week_number]
+            return (date, [model.Session.query(model.Package).get(id).name for id in ids], num, cumulative)
+        assert_equal(get_results(0),
+                     ('2011-01-10', [u'test2'], 1, 1))
+        assert_equal(get_results(1),
+                     ('2011-01-17', [], 0, 1))
+        assert_equal(get_results(2),
+                     ('2011-01-24', [], 0, 1))
+        assert_equal(get_results(3),
+                     ('2011-01-31', [], 0, 1))
+
+    def test_revisions_by_week(self):
+        revisions_by_week = RevisionStats.get_by_week('package_revisions')
+        def get_results(week_number):
+            date, ids, num, cumulative = revisions_by_week[week_number]
+            return (date, num, cumulative)
+        num_setup_revs = revisions_by_week[0][2]
+        assert 6 > num_setup_revs > 2, num_setup_revs
+        assert_equal(get_results(0),
+                     ('2011-01-03', num_setup_revs, num_setup_revs))
+        assert_equal(get_results(1),
+                     ('2011-01-10', 1, num_setup_revs+1))
+        assert_equal(get_results(2),
+                     ('2011-01-17', 2, num_setup_revs+3))
+        assert_equal(get_results(3),
+                     ('2011-01-24', 1, num_setup_revs+4))
+
+    def test_num_packages_by_week(self):
+        num_packages_by_week = RevisionStats.get_num_packages_by_week()
+        # e.g. [('2011-05-30', 3, 3)]
+        assert_equal(num_packages_by_week[0], ('2011-01-03', 4, 4))
+        assert_equal(num_packages_by_week[1], ('2011-01-10', -1, 3))
+        assert_equal(num_packages_by_week[2], ('2011-01-17', 0, 3))
+        assert_equal(num_packages_by_week[3], ('2011-01-24', 0, 3))
+