fixed 2.7 unicode issue in lark tests

dragonfly/parsing/grammar.lark

@@ -4,7 +4,7 @@
 ?alternative: sequence ("|" sequence)*
 ?sequence: single*
 
-?single: WORD                -> literal
+?single: WORD+               -> literal
       | "<" WORD ">"         -> reference
       | "[" alternative "]"  -> optional
       | "(" alternative ")"

dragonfly/test/test_lark_parser.py

@@ -8,7 +8,7 @@
 
 # ===========================================================================
 
-extras = {"an_extra": Alternative([Literal("1"), Literal("2")])}
+extras = {"an_extra": Alternative([Literal(u"1"), Literal(u"2")])}
 
 
 def check_parse_tree(spec, expected):
@@ -19,29 +19,29 @@ def check_parse_tree(spec, expected):
 
 class TestLarkParser(unittest.TestCase):
     def test_literal(self):
-        check_parse_tree("test   ", Literal("test"))
+        check_parse_tree("test   ", Literal(u"test"))
 
     def test_parens(self):
-        check_parse_tree("(test )   ", Literal("test"))
+        check_parse_tree("(test )   ", Literal(u"test"))
 
     def test_punctuation(self):
-        check_parse_tree(",", Literal(","))
-        check_parse_tree("test's   ", Literal("test's"))
-        check_parse_tree("cul-de-sac   ", Literal("cul-de-sac"))
+        check_parse_tree(",", Literal(u","))
+        check_parse_tree("test's   ", Literal(u"test's"))
+        check_parse_tree("cul-de-sac   ", Literal(u"cul-de-sac"))
 
     def test_sequence(self):
         check_parse_tree(
             " test <an_extra> [op]",
-            Sequence([Literal("test"), extras["an_extra"], Optional(Literal("op"))]),
+            Sequence([Literal(u"test"), extras["an_extra"], Optional(Literal(u"op"))]),
         )
 
     def test_alternative_no_parens(self):
         check_parse_tree(
             " test |[op] <an_extra>",
             Alternative(
                 [
-                    Literal("test"),
-                    Sequence([Optional(Literal("op")), extras["an_extra"]]),
+                    Literal(u"test"),
+                    Sequence([Optional(Literal(u"op")), extras["an_extra"]]),
                 ]
             ),
         )
@@ -51,17 +51,17 @@ def test_alternative_parens(self):
             "( test |[op] <an_extra>)",
             Alternative(
                 [
-                    Literal("test"),
-                    Sequence([Optional(Literal("op")), extras["an_extra"]]),
+                    Literal(u"test"),
+                    Sequence([Optional(Literal(u"op")), extras["an_extra"]]),
                 ]
             ),
         )
 
     def test_optional_alternative(self):
-        check_parse_tree("[test|test's]", Optional(Alternative([Literal("test"), Literal("test's")])))
+        check_parse_tree("[test|test's]", Optional(Alternative([Literal(u"test"), Literal(u"test's")])))
 
     def test_digit_in_word(self):
-        check_parse_tree("F2", Literal("F2"))
+        check_parse_tree("F2", Literal(u"F2"))
 
     def test_unicode(self):
         check_parse_tree(u"touché", Literal(u"touché"))