* string.c (sym_find): Add Symbol.find(str), which returns whether given

  string is defined as symbol or not. [Feature #7854]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45175 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_symbol.rb b/test/ruby/test_symbol.rb
index 7f261b68bb..70358ea1bc 100644
--- a/test/ruby/test_symbol.rb
+++ b/test/ruby/test_symbol.rb
@@ -1,4 +1,5 @@
 require 'test/unit'
+require_relative 'envutil'
 
 class TestSymbol < Test::Unit::TestCase
   # [ruby-core:3573]
@@ -206,4 +207,18 @@ class TestSymbol < Test::Unit::TestCase
     assert_equal(true, "foo#{Time.now.to_i}".to_sym.frozen?)
     assert_equal(true, :foo.to_sym.frozen?)
   end
+
+  def test_sym_find
+    assert_separately(%w[--disable=gems], <<-"end;")
+      assert_equal :intern, Symbol.find("intern")
+      assert_raise(TypeError){ Symbol.find(true) }
+
+      str = "__noexistent__"
+      assert_equal nil, Symbol.find(str)
+      assert_equal nil, Symbol.find(str)
+      sym = str.intern
+      assert_equal str, sym.to_s
+      assert_equal sym, Symbol.find(str)
+    end;
+  end
 end