1 files changed, 78 insertions, 12 deletions
diff --git a/spec/ruby/core/kernel/sleep_spec.rb b/spec/ruby/core/kernel/sleep_spec.rb
index 489f4f8410..61d8cc2380 100644
--- a/spec/ruby/core/kernel/sleep_spec.rb
+++ b/spec/ruby/core/kernel/sleep_spec.rb
@@ -1,34 +1,40 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
+require_relative '../fiber/fixtures/scheduler'
 
 describe "Kernel#sleep" do
   it "is a private method" do
-    Kernel.should have_private_instance_method(:sleep)
+    Kernel.private_instance_methods(false).should.include?(:sleep)
+  end
+
+  it "returns an Integer" do
+    sleep(0.001).should.is_a?(Integer)
   end
 
   it "accepts a Float" do
-    sleep(0.1).should be_close(0, 2)
+    sleep(0.001).should >= 0
   end
 
-  it "accepts a Fixnum" do
-    sleep(0).should be_close(0, 2)
+  it "accepts an Integer" do
+    sleep(0).should >= 0
   end
 
   it "accepts a Rational" do
-    sleep(Rational(1, 9)).should be_close(0, 2)
+    sleep(Rational(1, 999)).should >= 0
   end
 
-  it "raises an ArgumentError when passed a negative duration" do
-    lambda { sleep(-0.1) }.should raise_error(ArgumentError)
-    lambda { sleep(-1) }.should raise_error(ArgumentError)
+  it "accepts any Object that responds to divmod" do
+    o = Object.new
+    def o.divmod(*); [0, 0.001]; end
+    sleep(o).should >= 0
   end
 
-  it "raises a TypeError when passed nil" do
-    lambda { sleep(nil)   }.should raise_error(TypeError)
+  it "raises an ArgumentError when passed a negative duration" do
+    -> { sleep(-0.1) }.should.raise(ArgumentError)
+    -> { sleep(-1) }.should.raise(ArgumentError)
   end
 
   it "raises a TypeError when passed a String" do
-    lambda { sleep('2')   }.should raise_error(TypeError)
+    -> { sleep('2')   }.should.raise(TypeError)
   end
 
   it "pauses execution indefinitely if not given a duration" do
@@ -45,6 +51,66 @@ describe "Kernel#sleep" do
     t.wakeup
     t.value.should == 5
   end
+
+  it "sleeps with nanosecond precision" do
+    start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
+    100.times do
+      sleep(0.0001)
+    end
+    end_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
+
+    actual_duration = end_time - start_time
+    actual_duration.should > 0.01 # 100 * 0.0001 => 0.01
+  end
+
+  it "accepts a nil duration" do
+    running = false
+    t = Thread.new do
+      running = true
+      sleep(nil)
+      5
+    end
+
+    Thread.pass until running
+    Thread.pass while t.status and t.status != "sleep"
+
+    t.wakeup
+    t.value.should == 5
+  end
+
+  context "Kernel.sleep with Fiber scheduler" do
+    before :each do
+      Fiber.set_scheduler(FiberSpecs::LoggingScheduler.new)
+    end
+
+    after :each do
+      Fiber.set_scheduler(nil)
+    end
+
+    it "calls the scheduler without arguments when no duration is given" do
+      sleeper = Fiber.new(blocking: false) do
+        sleep
+      end
+      sleeper.resume
+      Fiber.scheduler.events.should == [{ event: :kernel_sleep, fiber: sleeper, args: [] }]
+    end
+
+    it "calls the scheduler with the given duration" do
+      sleeper = Fiber.new(blocking: false) do
+        sleep(0.01)
+      end
+      sleeper.resume
+      Fiber.scheduler.events.should == [{ event: :kernel_sleep, fiber: sleeper, args: [0.01] }]
+    end
+
+    it "does not call the scheduler if the fiber is blocking" do
+      sleeper = Fiber.new(blocking: true) do
+        sleep(0.01)
+      end
+      sleeper.resume
+      Fiber.scheduler.events.should == []
+    end
+  end
 end
 
 describe "Kernel.sleep" do