tests: add more tags controller/model tests.

test/functional/tags_controller_test.rb

@@ -26,7 +26,7 @@ class TagsControllerTest < ActionController::TestCase
 
     context "index action" do
       setup do
-        @tag = FactoryGirl.create(:tag, :name => "aaa")
+        @tag = FactoryGirl.create(:tag, name: "aaa", post_count: 1)
       end
 
       should "render" do
@@ -42,6 +42,15 @@ class TagsControllerTest < ActionController::TestCase
       end
     end
 
+    context "autocomplete action" do
+      should "render" do
+        FactoryGirl.create(:tag, name: "touhou", post_count: 1)
+
+        get :autocomplete, { search: { name_matches: "t" }, format: :json }
+        assert_response :success
+      end
+    end
+
     context "show action" do
       setup do
         @tag = FactoryGirl.create(:tag)

test/unit/tag_test.rb

@@ -208,4 +208,14 @@ class TagTest < ActiveSupport::TestCase
       end
     end
   end
+
+  context "A tag with a negative post count" do
+    should "be fixed" do
+      tag = FactoryGirl.create(:tag, name: "touhou", post_count: -10)
+      post = FactoryGirl.create(:post, tag_string: "touhou")
+
+      Tag.clean_up_negative_post_counts!
+      assert_equal(1, tag.reload.post_count)
+    end
+  end
 end