Add test for tag cloud query

test/unit/tag_cloud_query_test.rb

@@ -0,0 +1,31 @@
+require File.expand_path(File.dirname(__FILE__) + '/../test_helper')
+
+class TagCloudQueryTest < ActiveSupport::TestCase
+
+  fixtures :tags, :taggings, :users
+
+  def user
+    @user ||= User.find 1
+  end
+
+  def test_get_all_tags
+    tags = Stats::TagCloudQuery.new(user).result
+    assert_equal 2, tags.size
+    tags.sort_by! {|t| t.id}
+    tag = tags.first
+    assert_equal 3, tag.count
+    assert_equal "foo", tag.name
+
+    tag = tags.last
+    assert_equal 1, tag.count
+    assert_equal "bar", tag.name
+  end
+
+  def test_get_subset_of_tags
+    tags = Stats::TagCloudQuery.new(user, 1.week.ago).result
+
+    assert_equal 1, tags.size
+    assert_equal 2, tags.first.count
+    assert_equal "foo", tags.first.name
+  end
+end