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require 'em_test_helper'
class TestNextTick < Test::Unit::TestCase
def test_tick_arg
pr = proc {EM.stop}
EM.run {
EM.next_tick pr
}
assert true
end
def test_tick_block
EM.run {
EM.next_tick {EM.stop}
}
assert true
end
# This illustrates the solution to a long-standing problem.
# It's now possible to correctly nest calls to EM#run.
# See the source code commentary for EM#run for more info.
#
def test_run_run
EM.run {
EM.run {
EM.next_tick {EM.stop}
}
}
end
def test_pre_run_queue
x = false
EM.next_tick { EM.stop; x = true }
EM.run { EM.add_timer(0.01) { EM.stop } }
assert x
end
def test_cleanup_after_stop
x = true
EM.run{
EM.next_tick{
EM.stop
EM.next_tick{ x=false }
}
}
EM.run{
EM.next_tick{ EM.stop }
}
assert x
end
# We now support an additional parameter for EM#run.
# You can pass two procs to EM#run now. The first is executed as the normal
# run block. The second (if given) is scheduled for execution after the
# reactor loop completes.
# The reason for supporting this is subtle. There has always been an expectation
# that EM#run doesn't return until after the reactor loop ends. But now it's
# possible to nest calls to EM#run, which means that a nested call WILL
# RETURN. In order to write code that will run correctly either way, it's
# recommended to put any code which must execute after the reactor completes
# in the second parameter.
#
def test_run_run_2
a = proc {EM.stop}
b = proc {assert true}
EM.run a, b
end
# This illustrates that EM#run returns when it's called nested.
# This isn't a feature, rather it's something to be wary of when writing code
# that must run correctly even if EM#run is called while a reactor is already
# running.
def test_run_run_3
a = []
EM.run {
EM.run proc {EM.stop}, proc {a << 2}
a << 1
}
assert_equal( [1,2], a )
end
def test_schedule_on_reactor_thread
x = false
EM.run do
EM.schedule { x = true }
EM.stop
end
assert x
end
def test_schedule_from_thread
x = false
EM.run do
Thread.new { EM.schedule { x = true } }.join
assert !x
EM.next_tick { EM.stop }
end
assert x
end
end
|
