require_relative '../../spec_helper' describe "Thread#backtrace" do it "returns the current backtrace of a thread" do t = Thread.new do begin sleep rescue end end Thread.pass while t.status && t.status != 'sleep' backtrace = t.backtrace backtrace.should be_kind_of(Array) backtrace.first.should =~ /`sleep'/ t.raise 'finish the thread' t.join end it "returns nil for dead thread" do t = Thread.new {} t.join t.backtrace.should == nil end it "returns an array (which may be empty) immediately after the thread is created" do t = Thread.new { sleep } backtrace = t.backtrace t.kill t.join backtrace.should be_kind_of(Array) end end