1 files changed, 35 insertions, 0 deletions
diff --git a/activerecord/test/cases/arel/nodes/sum_test.rb b/activerecord/test/cases/arel/nodes/sum_test.rb
new file mode 100644
index 0000000000..5015964951
--- /dev/null
+++ b/activerecord/test/cases/arel/nodes/sum_test.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require_relative "../helper"
+
+class Arel::Nodes::SumTest < Arel::Spec
+  describe "as" do
+    it "should alias the sum" do
+      table = Arel::Table.new :users
+      table[:id].sum.as("foo").to_sql.must_be_like %{
+        SUM("users"."id") AS foo
+      }
+    end
+  end
+
+  describe "equality" do
+    it "is equal with equal ivars" do
+      array = [Arel::Nodes::Sum.new("foo"), Arel::Nodes::Sum.new("foo")]
+      assert_equal 1, array.uniq.size
+    end
+
+    it "is not equal with different ivars" do
+      array = [Arel::Nodes::Sum.new("foo"), Arel::Nodes::Sum.new("foo!")]
+      assert_equal 2, array.uniq.size
+    end
+  end
+
+  describe "order" do
+    it "should order the sum" do
+      table = Arel::Table.new :users
+      table[:id].sum.desc.to_sql.must_be_like %{
+        SUM("users"."id") DESC
+      }
+    end
+  end
+end