1 files changed, 47 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..30f6dac595
--- /dev/null
+++ b/activerecord/test/cases/arel/nodes/named_function_test.rb
@@ -0,0 +1,47 @@
+# 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