1 files changed, 58 insertions, 0 deletions
diff --git a/spec/ruby/core/thread/alive_spec.rb b/spec/ruby/core/thread/alive_spec.rb
new file mode 100644
index 0000000000..c2f5f5371d
--- /dev/null
+++ b/spec/ruby/core/thread/alive_spec.rb
@@ -0,0 +1,58 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Thread#alive?" do
+  it "can check it's own status" do
+    ThreadSpecs.status_of_current_thread.should.alive?
+  end
+
+  it "describes a running thread" do
+    ThreadSpecs.status_of_running_thread.should.alive?
+  end
+
+  it "describes a sleeping thread" do
+    ThreadSpecs.status_of_sleeping_thread.should.alive?
+  end
+
+  it "describes a blocked thread" do
+    ThreadSpecs.status_of_blocked_thread.should.alive?
+  end
+
+  it "describes a completed thread" do
+    ThreadSpecs.status_of_completed_thread.should_not.alive?
+  end
+
+  it "describes a killed thread" do
+    ThreadSpecs.status_of_killed_thread.should_not.alive?
+  end
+
+  it "describes a thread with an uncaught exception" do
+    ThreadSpecs.status_of_thread_with_uncaught_exception.should_not.alive?
+  end
+
+  it "describes a dying running thread" do
+    ThreadSpecs.status_of_dying_running_thread.should.alive?
+  end
+
+  it "describes a dying sleeping thread" do
+    ThreadSpecs.status_of_dying_sleeping_thread.should.alive?
+  end
+
+  it "returns true for a killed but still running thread" do
+    exit = false
+    t = Thread.new do
+      begin
+        sleep
+      ensure
+        Thread.pass until exit
+      end
+    end
+
+    ThreadSpecs.spin_until_sleeping(t)
+
+    t.kill
+    t.should.alive?
+    exit = true
+    t.join
+  end
+end