Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/core/fiber/new_spec.rb

@@ -0,0 +1,41 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+with_feature :fiber do
+  describe "Fiber.new" do
+    it "creates a fiber from the given block" do
+      fiber = Fiber.new {}
+      fiber.resume
+      fiber.should be_an_instance_of(Fiber)
+    end
+
+    it "creates a fiber from a subclass" do
+      class MyFiber < Fiber
+      end
+      fiber = MyFiber.new {}
+      fiber.resume
+      fiber.should be_an_instance_of(MyFiber)
+    end
+
+    it "raises an ArgumentError if called without a block" do
+      lambda { Fiber.new }.should raise_error(ArgumentError)
+    end
+
+    it "does not invoke the block" do
+      invoked = false
+      fiber = Fiber.new { invoked = true }
+      invoked.should be_false
+      fiber.resume
+    end
+
+    it "closes over lexical environments" do
+      o = Object.new
+      def o.f
+        a = 1
+        f = Fiber.new { a = 2 }
+        f.resume
+        a
+      end
+      o.f.should == 2
+    end
+  end
+end

spec/ruby/core/fiber/resume_spec.rb

@@ -0,0 +1,54 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../../../shared/fiber/resume', __FILE__)
+
+with_feature :fiber do
+  describe "Fiber#resume" do
+    it_behaves_like :fiber_resume, :resume
+  end
+
+  describe "Fiber#resume" do
+    it "returns control to the calling Fiber if called from one" do
+      fiber1 = Fiber.new { :fiber1 }
+      fiber2 = Fiber.new { fiber1.resume; :fiber2 }
+      fiber2.resume.should == :fiber2
+    end
+
+    with_feature :fork do
+      # Redmine #595
+      it "executes the ensure clause" do
+        rd, wr = IO.pipe
+
+        pid = Kernel::fork do
+          rd.close
+          f = Fiber.new do
+            begin
+              Fiber.yield
+            ensure
+              wr.write "executed"
+            end
+          end
+
+          # The apparent issue is that when Fiber.yield executes, control
+          # "leaves" the "ensure block" and so the ensure clause should run. But
+          # control really does NOT leave the ensure block when Fiber.yield
+          # executes. It merely pauses there. To require ensure to run when a
+          # Fiber is suspended then makes ensure-in-a-Fiber-context different
+          # than ensure-in-a-Thread-context and this would be very confusing.
+          f.resume
+
+          # When we execute the second #resume call, the ensure block DOES exit,
+          # the ensure clause runs. This is Ruby behavior as of 2.3.1.
+          f.resume
+
+          exit 0
+        end
+
+        wr.close
+        Process.waitpid pid
+
+        rd.read.should == "executed"
+        rd.close
+      end
+    end
+  end
+end

spec/ruby/core/fiber/yield_spec.rb

@@ -0,0 +1,51 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+with_feature :fiber do
+  describe "Fiber.yield" do
+    it "passes control to the Fiber's caller" do
+      step = 0
+      fiber = Fiber.new { step = 1; Fiber.yield; step = 2; Fiber.yield; step = 3 }
+      fiber.resume
+      step.should == 1
+      fiber.resume
+      step.should == 2
+    end
+
+    it "returns its arguments to the caller" do
+      fiber = Fiber.new { true; Fiber.yield :glark; true }
+      fiber.resume.should == :glark
+      fiber.resume
+    end
+
+    it "returns nil to the caller if given no arguments" do
+      fiber = Fiber.new { true; Fiber.yield; true }
+      fiber.resume.should be_nil
+      fiber.resume
+    end
+
+    it "returns to the Fiber the value of the #resume call that invoked it" do
+      fiber = Fiber.new { Fiber.yield.should == :caller }
+      fiber.resume
+      fiber.resume :caller
+    end
+
+    it "does not propagate or reraise a rescued exception" do
+      fiber = Fiber.new do
+        begin
+          raise "an error in a Fiber"
+        rescue
+          Fiber.yield :first
+        end
+
+        :second
+      end
+
+      fiber.resume.should == :first
+      fiber.resume.should == :second
+    end
+
+    it "raises a FiberError if called from the root Fiber" do
+      lambda{ Fiber.yield }.should raise_error(FiberError)
+    end
+  end
+end