Make non mri specific specs pass under RBX

lib/mutant/isolation.rb

@@ -18,9 +18,16 @@ module Mutant
     def self.call(&block)
       reader, writer = IO.pipe.each(&:binmode)
 
-      pid = fork do
-        reader.close
-        writer.write(Marshal.dump(block.call))
+      pid = fork
+
+      if pid.nil?
+        begin
+          reader.close
+          writer.write(Marshal.dump(block.call))
+          Kernel.exit!(0)
+        ensure
+          Kernel.exit!(1)
+        end
       end
 
       writer.close
@@ -40,7 +47,7 @@ module Mutant
     def self.read_result(reader, pid)
       begin
         data = Marshal.load(reader.read)
-      rescue ArgumentError
+      rescue ArgumentError, TypeError
         raise Error, 'Childprocess wrote un-unmarshallable data'
       end
 

lib/mutant/subject/method/instance.rb

@@ -32,7 +32,7 @@ module Mutant
         #
         def prepare
           expected_warnings =
-            if name.equal?(:initialize)
+            if RUBY_ENGINE.eql?('ruby') && name.equal?(:initialize)
               ["#{__FILE__}:#{__LINE__ + 5}: warning: undefining `initialize' may cause serious problems\n"]
             else
               []

spec/integration/mutant/corpus_spec.rb

@@ -10,7 +10,7 @@ describe 'Mutant on ruby corpus' do
   TMP = ROOT.join('tmp').freeze
 
   before do
-    pending 'Corpus test is deactivated on 1.9.3' if RUBY_VERSION.eql?('1.9.3')
+    skip 'Corpus test is deactivated on 1.9.3' if RUBY_VERSION.eql?('1.9.3')
   end
 
   MUTEX = Mutex.new

spec/unit/mutant/isolation_spec.rb

@@ -28,7 +28,7 @@ describe Mutant::Isolation do
       let(:block) do
         lambda do
           redirect_stderr
-          $stderr # not mashallable, nothing written to pipe and raised exceptions in child
+          $stderr # not mashallable, nothing written to pipe and raises exception in child
         end
       end
 
@@ -37,14 +37,13 @@ describe Mutant::Isolation do
       end
     end
 
-    context 'when block does return marshallable data, but process exits with nonzero exitstatus' do
+    context 'when block causes the child to exit nonzero' do
       let(:block) do
         lambda do
-          redirect_stderr
-          at_exit do
-            raise
+          method = Kernel.method(:exit!)
+          Kernel.define_singleton_method(:exit!) do |_status|
+            method.call(1)
           end
-          :foo
         end
       end
 

spec/unit/mutant/matcher/chain_spec.rb

@@ -11,16 +11,12 @@ describe Mutant::Matcher::Chain do
 
     let(:matchers) { [matcher_a, matcher_b] }
 
-    let(:matcher_a) { double('Matcher A') }
-    let(:matcher_b) { double('Matcher B') }
+    let(:matcher_a) { [subject_a] }
+    let(:matcher_b) { [subject_b] }
 
     let(:subject_a) { double('Subject A') }
     let(:subject_b) { double('Subject B') }
 
-    before do
-      matcher_a.stub(:each).and_yield(subject_a).and_return(matcher_a)
-      matcher_b.stub(:each).and_yield(subject_b).and_return(matcher_b)
-    end
 
     # it_should_behave_like 'an #each method'
     context 'with no block' do
@@ -28,12 +24,8 @@ describe Mutant::Matcher::Chain do
 
       it { should be_instance_of(to_enum.class) }
 
-      if defined?(RUBY_ENGINE) && RUBY_ENGINE == 'rbx'
-        pending 'FIX RBX rspec? BUG HERE'
-      else
-        it 'yields the expected values' do
-          expect(subject.to_a).to eql(object.to_a)
-        end
+      it 'yields the expected values' do
+        expect(subject.to_a).to eql(object.to_a)
       end
     end
 

spec/unit/mutant/matcher/namespace_spec.rb

@@ -34,7 +34,7 @@ describe Mutant::Matcher::Namespace do
       it { should be_instance_of(to_enum.class) }
 
       if defined?(RUBY_ENGINE) && RUBY_ENGINE == 'rbx'
-        pending 'FIX RBX rspec? BUG HERE'
+        skip 'FIX RBX rspec? BUG HERE'
       else
         it 'yields the expected values' do
           expect(subject.to_a).to eql(object.to_a)

spec/unit/mutant/warning_filter_spec.rb

@@ -1,6 +1,12 @@
 require 'spec_helper'
 
 describe Mutant::WarningFilter do
+  before do
+    if RUBY_ENGINE.eql?('rbx')
+      skip 'Disabled because expected warnings are from MRI'
+    end
+  end
+
   let(:object) { described_class.new(target) }
 
   let(:target) do