add test for set_sql.

spec/audited/audit_spec.rb

@@ -357,7 +357,8 @@ class Models::ActiveRecord::CustomUserSubclass < Models::ActiveRecord::CustomUse
 
   describe "as_audit_application" do
     it "should set audit_application string" do
-      Audited::Audit.as_audit_application("test-app") do
+      Audited::Audit.as_audit_application("test-app")
+      Audited::Audit.as_user(user) do
         company = Models::ActiveRecord::Company.create name: "The auditors"
         company.name = "The Auditors, Inc"
         company.save
@@ -368,4 +369,20 @@ class Models::ActiveRecord::CustomUserSubclass < Models::ActiveRecord::CustomUse
       end
     end
   end
+
+  describe "set_sql" do
+    it 'should set sql query' do
+      Audited.sql_log_enabled = true
+      Audited::Audit.as_user(user) do
+        company = Models::ActiveRecord::Company.create name: "The auditors"
+        company.name = "The Auditors, Inc"
+        company.save
+
+        company.audits.each do |audit|
+          expect(audit.sql).not_to be_nil
+        end
+      end
+      Audited.sql_log_enabled = false
+    end
+  end
 end