test_gem_specification.rb: skip meaningless tests

* test/rubygems/test_gem_specification.rb (have_syck): skip tests
  which are meaningless if syck is never possible.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36921 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index c0dfd4bafe..1fc9769146 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -117,6 +117,7 @@ end
   end
 
   def test_self_from_yaml_syck_date_bug
+    return unless have_syck     # No meanings if no syck
     # This is equivalent to (and totally valid) psych 1.0 output and
     # causes parse errors on syck.
     yaml = @a1.to_yaml
@@ -131,6 +132,7 @@ end
   end
 
   def test_self_from_yaml_syck_default_key_bug
+    return unless have_syck     # No meanings if no syck
     # This is equivalent to (and totally valid) psych 1.0 output and
     # causes parse errors on syck.
     yaml = <<-YAML
@@ -1729,4 +1731,16 @@ end
   ensure
     $VERBOSE = old_verbose
   end
+
+  def have_syck
+    unless defined?(@@have_syck)
+      begin
+        old_verbose, $VERBOSE = $VERBOSE, nil
+        @@have_syck = with_syck {YAML::ENGINE.syck?}
+      ensure
+        $VERBOSE = old_verbose
+      end
+    end
+    @@have_syck
+  end
 end