spec: skip Process wait specs on MJIT

until [Bug #14867] is fixed. I want to start running CI with MJIT
enabled before fixing the problem.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63731 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/mspec/lib/mspec/guards/feature.rb

@@ -39,3 +39,9 @@ end
 def with_feature(*features, &block)
   FeatureGuard.new(*features).run_if(:with_feature, &block)
 end
+
+MSpecEnv.class_eval do
+  def without_feature(*features, &block)
+    FeatureGuard.new(*features).run_unless(:without_feature, &block)
+  end
+end

spec/ruby/core/process/wait2_spec.rb

@@ -14,6 +14,7 @@ describe "Process.wait2" do
     end
   end
 
+  without_feature :mjit do # [Bug #14867]
     platform_is_not :windows do
       it "returns the pid and status of child process" do
         pidf = Process.fork { Process.exit! 99 }
@@ -29,4 +30,5 @@ describe "Process.wait2" do
       lambda { Process.wait2 }.should raise_error(Errno::ECHILD)
       lambda { Process.wait2 }.should raise_error(StandardError)
     end
+  end
 end

spec/ruby/core/process/wait_spec.rb

@@ -12,6 +12,7 @@ describe "Process.wait" do
     end
   end
 
+  without_feature :mjit do # [Bug #14867]
     it "raises an Errno::ECHILD if there are no child processes" do
       lambda { Process.wait }.should raise_error(Errno::ECHILD)
     end
@@ -87,4 +88,5 @@ describe "Process.wait" do
         lambda { Process.kill(0, pid) }.should raise_error(Errno::ESRCH)
       end
     end
+  end
 end

spec/ruby/core/process/waitall_spec.rb

@@ -8,6 +8,7 @@ describe "Process.waitall" do
     end
   end
 
+  without_feature :mjit do # [Bug #14867]
     it "returns an empty array when there are no children" do
       Process.waitall.should == []
     end
@@ -45,4 +46,5 @@ describe "Process.waitall" do
         }
       end
     end
+  end
 end

spec/ruby/default.mspec

@@ -49,4 +49,5 @@ class MSpecScript
   MSpec.enable_feature :fiber_library
   MSpec.enable_feature :fork if respond_to?(:fork, true)
   MSpec.enable_feature :encoding
+  MSpec.enable_feature :mjit if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
 end