1 files changed, 48 insertions, 0 deletions
diff --git a/activerecord/test/cases/arel/nodes/named_function_test.rb b/activerecord/test/cases/arel/nodes/named_function_test.rb
new file mode 100644
index 0000000000..dbd7ae43be
--- /dev/null
+++ b/activerecord/test/cases/arel/nodes/named_function_test.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require_relative "../helper"
+
+module Arel
+  module Nodes
+    class TestNamedFunction < Arel::Test
+      def test_construct
+        function = NamedFunction.new "omg", "zomg"
+        assert_equal "omg", function.name
+        assert_equal "zomg", function.expressions
+      end
+
+      def test_function_alias
+        function = NamedFunction.new "omg", "zomg"
+        function = function.as("wth")
+        assert_equal "omg", function.name
+        assert_equal "zomg", function.expressions
+        assert_kind_of SqlLiteral, function.alias
+        assert_equal "wth", function.alias
+      end
+
+      def test_construct_with_alias
+        function = NamedFunction.new "omg", "zomg", "wth"
+        assert_equal "omg", function.name
+        assert_equal "zomg", function.expressions
+        assert_kind_of SqlLiteral, function.alias
+        assert_equal "wth", function.alias
+      end
+
+      def test_equality_with_same_ivars
+        array = [
+          NamedFunction.new("omg", "zomg", "wth"),
+          NamedFunction.new("omg", "zomg", "wth")
+        ]
+        assert_equal 1, array.uniq.size
+      end
+
+      def test_inequality_with_different_ivars
+        array = [
+          NamedFunction.new("omg", "zomg", "wth"),
+          NamedFunction.new("zomg", "zomg", "wth")
+        ]
+        assert_equal 2, array.uniq.size
+      end
+    end
+  end
+end