1 files changed, 45 insertions, 0 deletions
diff --git a/spec/engines/sql/unit/relations/having_spec.rb b/spec/engines/sql/unit/relations/having_spec.rb
new file mode 100644
index 0000000000..fe6f3cc520
--- /dev/null
+++ b/spec/engines/sql/unit/relations/having_spec.rb
@@ -0,0 +1,45 @@
+require 'spec_helper'
+
+module Arel
+  describe Having do
+    before do
+      @relation = Table.new(:developers)
+    end
+
+    describe '#to_sql' do
+      describe 'when given a predicate' do
+        it "manufactures sql with where clause conditions" do
+          sql = @relation.group(@relation[:department]).having("MIN(salary) > 1000").to_sql
+
+          adapter_is :mysql do
+            sql.should be_like(%Q{
+              SELECT `developers`.`id`, `developers`.`name`, `developers`.`salary`, `developers`.`department`, `developers`.`created_at`
+              FROM `developers`
+              GROUP BY `developers`.`department`
+              HAVING MIN(salary) > 1000
+            })
+          end
+
+          adapter_is :oracle do
+            sql.should be_like(%Q{
+              SELECT "DEVELOPERS"."ID", "DEVELOPERS"."NAME", "DEVELOPERS"."SALARY", "DEVELOPERS"."DEPARTMENT", "DEVELOPERS"."CREATED_AT"
+              FROM "DEVELOPERS"
+              GROUP BY "DEVELOPERS"."DEPARTMENT"
+              HAVING MIN(salary) > 1000
+            })
+          end
+
+          adapter_is_not :mysql, :oracle do
+            sql.should be_like(%Q{
+              SELECT "developers"."id", "developers"."name", "developers"."salary", "developers"."department", "developers"."created_at"
+              FROM "developers"
+              GROUP BY "developers"."department"
+              HAVING MIN(salary) > 1000
+            })
+          end
+        end
+      end
+    end
+  end
+end
+