1 files changed, 75 insertions, 0 deletions
diff --git a/activerecord/test/cases/arel/nodes/sql_literal_test.rb b/activerecord/test/cases/arel/nodes/sql_literal_test.rb
new file mode 100644
index 0000000000..3b95fed1f4
--- /dev/null
+++ b/activerecord/test/cases/arel/nodes/sql_literal_test.rb
@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+require_relative "../helper"
+require "yaml"
+
+module Arel
+  module Nodes
+    class SqlLiteralTest < Arel::Spec
+      before do
+        @visitor = Visitors::ToSql.new Table.engine.connection
+      end
+
+      def compile(node)
+        @visitor.accept(node, Collectors::SQLString.new).value
+      end
+
+      describe "sql" do
+        it "makes a sql literal node" do
+          sql = Arel.sql "foo"
+          sql.must_be_kind_of Arel::Nodes::SqlLiteral
+        end
+      end
+
+      describe "count" do
+        it "makes a count node" do
+          node = SqlLiteral.new("*").count
+          compile(node).must_be_like %{ COUNT(*) }
+        end
+
+        it "makes a distinct node" do
+          node = SqlLiteral.new("*").count true
+          compile(node).must_be_like %{ COUNT(DISTINCT *) }
+        end
+      end
+
+      describe "equality" do
+        it "makes an equality node" do
+          node = SqlLiteral.new("foo").eq(1)
+          compile(node).must_be_like %{ foo = 1 }
+        end
+
+        it "is equal with equal contents" do
+          array = [SqlLiteral.new("foo"), SqlLiteral.new("foo")]
+          assert_equal 1, array.uniq.size
+        end
+
+        it "is not equal with different contents" do
+          array = [SqlLiteral.new("foo"), SqlLiteral.new("bar")]
+          assert_equal 2, array.uniq.size
+        end
+      end
+
+      describe 'grouped "or" equality' do
+        it "makes a grouping node with an or node" do
+          node = SqlLiteral.new("foo").eq_any([1, 2])
+          compile(node).must_be_like %{ (foo = 1 OR foo = 2) }
+        end
+      end
+
+      describe 'grouped "and" equality' do
+        it "makes a grouping node with an and node" do
+          node = SqlLiteral.new("foo").eq_all([1, 2])
+          compile(node).must_be_like %{ (foo = 1 AND foo = 2) }
+        end
+      end
+
+      describe "serialization" do
+        it "serializes into YAML" do
+          yaml_literal = SqlLiteral.new("foo").to_yaml
+          assert_equal("foo", YAML.load(yaml_literal))
+        end
+      end
+    end
+  end
+end