diff --git a/spec/integration/author_spec.rb b/spec/integration/author_spec.rb
index 624755159..7f4789870 100644
--- a/spec/integration/author_spec.rb
+++ b/spec/integration/author_spec.rb
@@ -10,4 +10,36 @@ describe GitStats::GitData::Activity do
     tg.commits.map(&:hash).should =~ %w(b3b4f81 d60b5ec ab47ef8 2c11f5e c87ecf9 b621a5d 4e7d0e9 45677ee)
     jd.commits.map(&:hash).should =~ %w(fd66657 81e8bef)
   end
+
+  context 'activity' do
+    it 'should count commits by hour' do
+      tg.activity.by_hour.should == {10 => 4, 12 => 2, 13 => 1, 17 => 1}
+      jd.activity.by_hour.should == {12 => 1, 15 => 1}
+    end
+
+    it 'should count commits by day of week' do
+      tg.activity.by_wday.should == {0 => 2, 5 => 5, 6 => 1}
+      jd.activity.by_wday.should == {0 => 1, 3 => 1}
+    end
+
+    it 'should count commits by day of week and hour' do
+      tg.activity.by_wday_hour.should == {0 => {12 => 1, 13 => 1}, 5 => {10 => 4, 17 => 1}, 6 => {12 => 1}}
+      jd.activity.by_wday_hour.should == {0 => {12 => 1}, 3 => {15 => 1}}
+    end
+
+    it 'should count commits by month' do
+      tg.activity.by_month.should == {10 => 8}
+      jd.activity.by_month.should == {10 => 2}
+    end
+
+    it 'should count commits by year' do
+      tg.activity.by_year.should == {2012 => 8}
+      jd.activity.by_year.should == {2012 => 2}
+    end
+
+    it 'should count commits by year and month' do
+      tg.activity.by_year_month.should == {2012 => {10 => 8}}
+      jd.activity.by_year_month.should == {2012 => {10 => 2}}
+    end
+  end
 end
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