Revert "* lib/yaml.rb: Remove Psych::EngineManager [Bug #8344]"

zzak is not the maintainer of yaml.
This reverts commit r46097.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46102 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 47 insertions, 0 deletions

diff --git a/test/psych/test_engine_manager.rb b/test/psych/test_engine_manager.rb
new file mode 100644
index 0000000000..33a67432eb
--- /dev/null
+++ b/test/psych/test_engine_manager.rb
@@ -0,0 +1,47 @@
+require_relative 'helper'
+require 'yaml'
+
+module Psych
+ class TestEngineManager < TestCase
+   def test_bad_engine
+     assert_raises(ArgumentError) do
+       YAML::ENGINE.yamler = 'foooo'
+     end
+   end
+
+   def test_set_psych
+     YAML::ENGINE.yamler = 'psych'
+     assert_equal Psych, YAML
+     assert_equal 'psych', YAML::ENGINE.yamler
+   end
+
+   A = Struct.new(:name)
+
+   def test_dump_types
+     YAML::ENGINE.yamler = 'psych'
+
+     assert_to_yaml ::Object.new
+     assert_to_yaml Time.now
+     assert_to_yaml Date.today
+     assert_to_yaml('a' => 'b')
+     assert_to_yaml A.new('foo')
+     assert_to_yaml %w{a b}
+     assert_to_yaml Exception.new('foo')
+     assert_to_yaml "hello!"
+     assert_to_yaml :fooo
+     assert_to_yaml(1..10)
+     assert_to_yaml(/hello!~/)
+     assert_to_yaml 1
+     assert_to_yaml 1.2
+     assert_to_yaml Rational(1, 2)
+     assert_to_yaml Complex(1, 2)
+     assert_to_yaml true
+     assert_to_yaml false
+     assert_to_yaml nil
+   end
+
+   def assert_to_yaml obj
+     assert obj.to_yaml, "#{obj.class} to_yaml works"
+   end
+ end
+end