add spec to detect new array methods

Author: Nicolas Laurent

spec/tags/truffle/synchronized_array_tags.txt

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+slow:Truffle::SynchronizedArray redefines all Array and Enumerable methods

spec/truffle/synchronized_array_spec.rb

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+# truffleruby_primitives: true
+
+# Copyright (c) 2020 Oracle and/or its affiliates. All rights reserved. This
+# code is released under a tri EPL/GPL/LGPL license. You can use it,
+# redistribute it and/or modify it under the terms of the:
+#
+# Eclipse Public License version 2.0, or
+# GNU General Public License version 2, or
+# GNU Lesser General Public License version 2.1.
+
+require_relative '../ruby/spec_helper'
+
+describe "Truffle::SynchronizedArray" do
+  it "redefines all Array and Enumerable methods" do
+    expected_methods = ruby_exe("puts Array.public_instance_methods(false) + Enumerable.public_instance_methods(false)")
+    expected_methods = expected_methods.lines(chomp: true).map { |line| line.to_sym }.uniq!.sort!
+    synchronized_methods = Truffle::SynchronizedArray.public_instance_methods(false).sort!
+
+    if synchronized_methods == expected_methods
+      synchronized_methods.should == synchronized_methods
+    else
+      # if the fast check fails, do a slower check to determine why
+      expected_methods.each do |m|
+        synchronized_methods.should include(m)
+      end
+      synchronized_methods.each do |m|
+        expected_methods.should include(m)
+      end
+    end
+  end
+end