1 files changed, 112 insertions, 0 deletions
diff --git a/actionpack/test/journey/route/definition/parser_test.rb b/actionpack/test/journey/route/definition/parser_test.rb
new file mode 100644
index 0000000000..39693198b8
--- /dev/null
+++ b/actionpack/test/journey/route/definition/parser_test.rb
@@ -0,0 +1,112 @@
+# frozen_string_literal: true
+
+require "abstract_unit"
+
+module ActionDispatch
+  module Journey
+    module Definition
+      class TestParser < ActiveSupport::TestCase
+        def setup
+          @parser = Parser.new
+        end
+
+        def test_slash
+          assert_equal :SLASH, @parser.parse("/").type
+          assert_round_trip "/"
+        end
+
+        def test_segment
+          assert_round_trip "/foo"
+        end
+
+        def test_segments
+          assert_round_trip "/foo/bar"
+        end
+
+        def test_segment_symbol
+          assert_round_trip "/foo/:id"
+        end
+
+        def test_symbol
+          assert_round_trip "/:foo"
+        end
+
+        def test_group
+          assert_round_trip "(/:foo)"
+        end
+
+        def test_groups
+          assert_round_trip "(/:foo)(/:bar)"
+        end
+
+        def test_nested_groups
+          assert_round_trip "(/:foo(/:bar))"
+        end
+
+        def test_dot_symbol
+          assert_round_trip(".:format")
+        end
+
+        def test_dot_literal
+          assert_round_trip(".xml")
+        end
+
+        def test_segment_dot
+          assert_round_trip("/foo.:bar")
+        end
+
+        def test_segment_group_dot
+          assert_round_trip("/foo(.:bar)")
+        end
+
+        def test_segment_group
+          assert_round_trip("/foo(/:action)")
+        end
+
+        def test_segment_groups
+          assert_round_trip("/foo(/:action)(/:bar)")
+        end
+
+        def test_segment_nested_groups
+          assert_round_trip("/foo(/:action(/:bar))")
+        end
+
+        def test_group_followed_by_path
+          assert_round_trip("/foo(/:action)/:bar")
+        end
+
+        def test_star
+          assert_round_trip("*foo")
+          assert_round_trip("/*foo")
+          assert_round_trip("/bar/*foo")
+          assert_round_trip("/bar/(*foo)")
+        end
+
+        def test_or
+          assert_round_trip("a|b")
+          assert_round_trip("a|b|c")
+          assert_round_trip("(a|b)|c")
+          assert_round_trip("a|(b|c)")
+          assert_round_trip("*a|(b|c)")
+          assert_round_trip("*a|:b|c")
+        end
+
+        def test_arbitrary
+          assert_round_trip("/bar/*foo#")
+        end
+
+        def test_literal_dot_paren
+          assert_round_trip "/sprockets.js(.:format)"
+        end
+
+        def test_groups_with_dot
+          assert_round_trip "/(:locale)(.:format)"
+        end
+
+        def assert_round_trip(str)
+          assert_equal str, @parser.parse(str).to_s
+        end
+      end
+    end
+  end
+end