[ruby/yarp] Revisit lex.rake, make lex:rubygems more useable

https://github.com/ruby/yarp/commit/4c76f4a0c0

test/yarp/desugar_visitor_test.rb

@@ -13,7 +13,7 @@ module YARP
       assert_desugars("(AndNode (LocalVariableReadNode) (LocalVariableWriteNode (CallNode)))", "foo &&= bar")
       assert_desugars("(AndNode (LocalVariableReadNode) (LocalVariableWriteNode (CallNode)))", "foo = 1; foo &&= bar")
     end
-  
+
     def test_or_write
       assert_desugars("(IfNode (DefinedNode (ClassVariableReadNode)) (StatementsNode (ClassVariableReadNode)) (ElseNode (StatementsNode (ClassVariableWriteNode (CallNode)))))", "@@foo ||= bar")
       assert_desugars("(IfNode (DefinedNode (ConstantPathNode (ConstantReadNode) (ConstantReadNode))) (StatementsNode (ConstantPathNode (ConstantReadNode) (ConstantReadNode))) (ElseNode (StatementsNode (ConstantPathWriteNode (ConstantPathNode (ConstantReadNode) (ConstantReadNode)) (CallNode)))))", "Foo::Bar ||= baz")
@@ -23,7 +23,7 @@ module YARP
       assert_desugars("(OrNode (LocalVariableReadNode) (LocalVariableWriteNode (CallNode)))", "foo ||= bar")
       assert_desugars("(OrNode (LocalVariableReadNode) (LocalVariableWriteNode (CallNode)))", "foo = 1; foo ||= bar")
     end
-  
+
     def test_operator_write
       assert_desugars("(ClassVariableWriteNode (CallNode (ClassVariableReadNode) (ArgumentsNode (CallNode))))", "@@foo += bar")
       assert_desugars("(ConstantPathWriteNode (ConstantPathNode (ConstantReadNode) (ConstantReadNode)) (CallNode (ConstantPathNode (ConstantReadNode) (ConstantReadNode)) (ArgumentsNode (CallNode))))", "Foo::Bar += baz")
@@ -33,7 +33,7 @@ module YARP
       assert_desugars("(LocalVariableWriteNode (CallNode (LocalVariableReadNode) (ArgumentsNode (CallNode))))", "foo += bar")
       assert_desugars("(LocalVariableWriteNode (CallNode (LocalVariableReadNode) (ArgumentsNode (CallNode))))", "foo = 1; foo += bar")
     end
-  
+
     private
 
     def ast_inspect(node)

test/yarp/fuzzer_test.rb

@@ -4,7 +4,7 @@ require_relative "test_helper"
 
 module YARP
   # These tests are simply to exercise snippets found by the fuzzer that caused invalid memory access.
-  class FuzzerTest < Test::Unit::TestCase
+  class FuzzerTest < TestCase
     def self.snippet(name, source)
       define_method(:"test_fuzzer_#{name}") { YARP.dump(source) }
     end

test/yarp/test_helper.rb

@@ -83,22 +83,5 @@ module YARP
         assert_equal expected, actual
       end
     end
-
-    def assert_valid_locations(value, parent: nil)
-      case value
-      when Array
-        value.each do |element|
-          assert_valid_locations(element, parent: value)
-        end
-      when Node
-        value.deconstruct_keys(nil).each_value do |field|
-          assert_valid_locations(field, parent: value)
-        end
-      when Location
-        assert_operator value.start_offset, :<=, value.end_offset, -> {
-          "start_offset > end_offset for #{value.inspect}, parent is #{parent.pretty_inspect}"
-        }
-      end
-    end
   end
 end