spec/ruby/core/thread/alive_spec.rb


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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.alive?.should == true
  end

  it "describes a running thread" do
    ThreadSpecs.status_of_running_thread.alive?.should == true
  end

  it "describes a sleeping thread" do
    ThreadSpecs.status_of_sleeping_thread.alive?.should == true
  end

  it "describes a blocked thread" do
    ThreadSpecs.status_of_blocked_thread.alive?.should == true
  end

  it "describes a completed thread" do
    ThreadSpecs.status_of_completed_thread.alive?.should == false
  end

  it "describes a killed thread" do
    ThreadSpecs.status_of_killed_thread.alive?.should == false
  end

  it "describes a thread with an uncaught exception" do
    ThreadSpecs.status_of_thread_with_uncaught_exception.alive?.should == false
  end

  it "describes a dying running thread" do
    ThreadSpecs.status_of_dying_running_thread.alive?.should == true
  end

  it "describes a dying sleeping thread" do
    ThreadSpecs.status_of_dying_sleeping_thread.alive?.should == true
  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.alive?.should == true
    exit = true
    t.join
  end
end