makes sure tagging_count is decreased when hidden a taggable

spec/models/tag_spec.rb

@@ -0,0 +1,31 @@
+require 'rails_helper'
+
+describe Tag do
+
+  it "decreases tag_count when a debate is hidden" do
+    debate = create(:debate)
+    tag = create(:tag)
+    tagging = create(:tagging, tag: tag, taggable: debate)
+
+    expect(tag.taggings_count).to eq(1)
+
+    debate.update(hidden_at: Time.now)
+
+    tag.reload
+    expect(tag.taggings_count).to eq(0)
+  end
+
+  it "decreases tag_count when a proposal is hidden" do
+    proposal = create(:proposal)
+    tag = create(:tag)
+    tagging = create(:tagging, tag: tag, taggable: proposal)
+
+    expect(tag.taggings_count).to eq(1)
+
+    proposal.update(hidden_at: Time.now)
+
+    tag.reload
+    expect(tag.taggings_count).to eq(0)
+  end
+
+end