Upgrade rubocop

test/unit/parser_unit_test.rb

@@ -1,23 +1,25 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class ParserUnitTest < Minitest::Test
   include Liquid
 
   def test_consume
-    p = Parser.new("wat: 7")
+    p = Parser.new('wat: 7')
     assert_equal 'wat', p.consume(:id)
     assert_equal ':', p.consume(:colon)
     assert_equal '7', p.consume(:number)
   end
 
   def test_jump
-    p = Parser.new("wat: 7")
+    p = Parser.new('wat: 7')
     p.jump(2)
     assert_equal '7', p.consume(:number)
   end
 
   def test_consume?
-    p = Parser.new("wat: 7")
+    p = Parser.new('wat: 7')
     assert_equal 'wat', p.consume?(:id)
     assert_equal false, p.consume?(:dot)
     assert_equal ':', p.consume(:colon)
@@ -25,7 +27,7 @@ class ParserUnitTest < Minitest::Test
   end
 
   def test_id?
-    p = Parser.new("wat 6 Peter Hegemon")
+    p = Parser.new('wat 6 Peter Hegemon')
     assert_equal 'wat', p.id?('wat')
     assert_equal false, p.id?('endgame')
     assert_equal '6', p.consume(:number)
@@ -34,7 +36,7 @@ class ParserUnitTest < Minitest::Test
   end
 
   def test_look
-    p = Parser.new("wat 6 Peter Hegemon")
+    p = Parser.new('wat 6 Peter Hegemon')
     assert_equal true, p.look(:id)
     assert_equal 'wat', p.consume(:id)
     assert_equal false, p.look(:comparison)
@@ -44,7 +46,7 @@ class ParserUnitTest < Minitest::Test
   end
 
   def test_expressions
-    p = Parser.new("hi.there hi?[5].there? hi.there.bob")
+    p = Parser.new('hi.there hi?[5].there? hi.there.bob')
     assert_equal 'hi.there', p.expression
     assert_equal 'hi?[5].there?', p.expression
     assert_equal 'hi.there.bob', p.expression
@@ -57,7 +59,7 @@ class ParserUnitTest < Minitest::Test
   end
 
   def test_ranges
-    p = Parser.new("(5..7) (1.5..9.6) (young..old) (hi[5].wat..old)")
+    p = Parser.new('(5..7) (1.5..9.6) (young..old) (hi[5].wat..old)')
     assert_equal '(5..7)', p.expression
     assert_equal '(1.5..9.6)', p.expression
     assert_equal '(young..old)', p.expression
@@ -65,7 +67,7 @@ class ParserUnitTest < Minitest::Test
   end
 
   def test_arguments
-    p = Parser.new("filter: hi.there[5], keyarg: 7")
+    p = Parser.new('filter: hi.there[5], keyarg: 7')
     assert_equal 'filter', p.consume(:id)
     assert_equal ':', p.consume(:colon)
     assert_equal 'hi.there[5]', p.argument
@@ -75,7 +77,7 @@ class ParserUnitTest < Minitest::Test
 
   def test_invalid_expression
     assert_raises(SyntaxError) do
-      p = Parser.new("==")
+      p = Parser.new('==')
       p.expression
     end
   end