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|
require "spec"
require "../spec_helper"
describe "select" do
it "select many receivers" do
ch1 = Channel(Int32).new
ch2 = Channel(Int32).new
res = [] of Int32
spawn do
10.times do |i|
(i % 2 == 0) ? ch1.send(i) : ch2.send(i)
end
end
10.times do
select
when x = ch1.receive
res << x
when y = ch2.receive
res << y
end
end
res.should eq (0...10).to_a
end
it "select many senders" do
ch1 = Channel(Int32).new
ch2 = Channel(Int32).new
res = Array.new(10, 0)
f1 = spawn do
5.times { res[ch1.receive] = 1 }
end
f2 = spawn do
5.times { res[ch2.receive] = 1 }
end
10.times do |i|
select
when ch1.send(i)
when ch2.send(i)
end
end
until f1.dead? && f2.dead?
Fiber.yield
end
res.should eq Array.new(10, 1)
end
it "select many receivers, senders" do
ch1 = Channel(Int32).new
ch2 = Channel(Int32).new
res = [] of Int32
f = spawn do
10.times do |i|
select
when x = ch1.receive
res << x
when ch2.send(i)
end
end
end
10.times do |i|
select
when ch1.send(i)
when y = ch2.receive
res << y
end
end
wait_until_finished f
res.should eq (0...10).to_a
end
it "select should work with send which started before receive, fixed #3862" do
ch1 = Channel(Int32).new
ch2 = Channel(Int32).new
main = Fiber.current
spawn do
select
when ch1.send(1)
when ch2.receive
end
end
x = nil
spawn do
select
when a = ch1.receive
x = a
when b = ch2.receive
x = b
end
ensure
main.enqueue
end
sleep
x.should eq 1
end
it "select fiber has one chance to be enqueued into scheduler (1)" do
ch1 = Channel(Int32).new
ch2 = Channel(Int32).new
ch3 = Channel(Int32).new
x = nil
f = spawn do
select
when x = ch1.receive
when x = ch2.receive
end
end
spawn do
ch1.send 1
ch3.send 3
ch2.close
end
ch3.receive.should eq(3)
wait_until_finished f
x.should eq(1)
end
it "select fiber has one chance to be enqueued into scheduler (2)" do
ch1 = Channel(Int32).new
ch2 = Channel(Int32).new
ch3 = Channel(Int32).new
x = nil
f = spawn do
select
when ch1.send 1
x = 1
when ch2.send 2
x = 2
end
end
spawn do
ch1.receive
ch3.send 3
ch2.close
end
ch3.receive.should eq(3)
wait_until_finished f
x.should eq(1)
end
it "select same channel multiple times" do
ch = Channel(Int32).new
spawn do
ch.send(123)
end
select
when ch.send(456)
when x = ch.receive
end
x.should eq 123
end
it "prioritize by order when entering in a select" do
ch1 = Channel(Int32).new(5)
ch2 = Channel(Int32).new(5)
2.times { ch1.send 1 }
2.times { ch2.send 2 }
select
when x = ch1.receive
when x = ch2.receive
end
x.should eq 1
select
when x = ch2.receive
when x = ch1.receive
end
x.should eq 2
end
it "stress select with send/receive in multiple fibers" do
fibers = 4
msg_per_sender = 1000
ch = Array.new(fibers) { Array.new(fibers) { Channel(Int32).new } }
done = Channel({Int32, Int32}).new
fibers.times do |i|
spawn(name: "sender #{i}") do
channels = ch[i]
msg_per_sender.times do |i|
Channel.send_first(i, channels)
end
channels.map &.send(-1)
end
end
fibers.times do |i|
spawn(name: "receiver #{i}") do
channels = ch.map { |chs| chs[i] }
closed = 0
count = 0
sum = 0
loop do
x = Channel.receive_first(channels).not_nil!
if x == -1
closed += 1
break if closed == fibers
else
count += 1
sum += x
end
end
done.send({count, sum})
end
end
count = 0
sum = 0
fibers.times do
c, s = done.receive
count += c
sum += s
end
count.should eq(fibers * msg_per_sender)
sum.should eq(msg_per_sender * (msg_per_sender - 1) / 2 * fibers)
end
context "blocking raise-on-close single-channel" do
it "types and exec when" do
ch = Channel(String).new
spawn_and_check(->{ ch.send "foo" }) do |w|
select
when m = ch.receive
w.check
typeof(m).should eq(String)
m.should eq("foo")
end
end
end
{% if flag?(:win32) && flag?(:aarch64) %}
pending "raises if channel was closed"
{% else %}
it "raises if channel was closed" do
ch = Channel(String).new
spawn_and_check(->{ ch.close }) do |w|
begin
select
when m = ch.receive
end
rescue Channel::ClosedError
w.check
end
end
end
{% end %}
end
context "non-blocking raise-on-close single-channel" do
it "types and exec when if message was ready" do
ch = Channel(String).new
spawn_and_check(->{ ch.send "foo" }) do |w|
select
when m = ch.receive
w.check
typeof(m).should eq(String)
m.should eq("foo")
else
end
end
end
it "exec else if no message was ready" do
ch = Channel(String).new
spawn_and_check(->{ nil }) do |w|
select
when m = ch.receive
else
w.check
end
end
end
{% if flag?(:win32) && flag?(:aarch64) %}
pending "raises if channel was closed"
{% else %}
it "raises if channel was closed" do
ch = Channel(String).new
spawn_and_check(->{ ch.close }) do |w|
begin
select
when m = ch.receive
else
end
rescue Channel::ClosedError
w.check
end
end
end
{% end %}
end
context "blocking raise-on-close multi-channel" do
it "types and exec when (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.send "foo" }) do |w|
select
when m = ch.receive
w.check
typeof(m).should eq(String)
m.should eq("foo")
when m = ch2.receive
end
end
end
it "types and exec when (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.send true }) do |w|
select
when m = ch.receive
when m = ch2.receive
w.check
typeof(m).should eq(Bool)
m.should eq(true)
end
end
end
{% if flag?(:win32) && flag?(:aarch64) %}
pending "raises if channel was closed"
{% else %}
it "raises if channel was closed (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.close }) do |w|
begin
select
when m = ch.receive
when m = ch2.receive
end
rescue Channel::ClosedError
w.check
end
end
end
it "raises if channel was closed (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.close }) do |w|
begin
select
when m = ch.receive
when m = ch2.receive
end
rescue Channel::ClosedError
w.check
end
end
end
{% end %}
end
context "non-blocking raise-on-close multi-channel" do
it "types and exec when (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.send "foo" }) do |w|
select
when m = ch.receive
w.check
typeof(m).should eq(String)
m.should eq("foo")
when m = ch2.receive
else
end
end
end
it "types and exec when (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.send true }) do |w|
select
when m = ch.receive
when m = ch2.receive
w.check
typeof(m).should eq(Bool)
m.should eq(true)
else
end
end
end
it "exec else if no message was ready" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ nil }) do |w|
select
when m = ch.receive
when m = ch2.receive
else
w.check
end
end
end
{% if flag?(:win32) && flag?(:aarch64) %}
pending "raises if channel was closed"
{% else %}
it "raises if channel was closed (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.close }) do |w|
begin
select
when m = ch.receive
when m = ch2.receive
else
end
rescue Channel::ClosedError
w.check
end
end
end
it "raises if channel was closed (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.close }) do |w|
begin
select
when m = ch.receive
when m = ch2.receive
else
end
rescue Channel::ClosedError
w.check
end
end
end
{% end %}
end
context "blocking nil-on-close single-channel" do
it "types and exec when" do
ch = Channel(String).new
spawn_and_check(->{ ch.send "foo" }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should eq("foo")
end
end
end
it "types and exec when with nil if channel was closed" do
ch = Channel(String).new
spawn_and_check(->{ ch.close }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should be_nil
end
end
end
end
context "blocking nil-on-close multi-channel" do
it "types and exec when (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.send "foo" }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should eq("foo")
when m = ch2.receive?
end
end
end
it "types and exec when (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.send true }) do |w|
select
when m = ch.receive?
when m = ch2.receive?
w.check
typeof(m).should eq(Bool?)
m.should eq(true)
end
end
end
it "types and exec when with nil if channel was closed (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.close }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should be_nil
when m = ch2.receive?
end
end
end
it "types and exec when with nil if channel was closed (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.close }) do |w|
select
when m = ch.receive?
when m = ch2.receive?
w.check
typeof(m).should eq(Bool?)
m.should be_nil
end
end
end
it "types and exec when with nil if channel is closed while waiting (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.close }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should be_nil
when m = ch2.receive?
end
end
end
it "types and exec when with nil if channel is closed while waiting (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.close }) do |w|
select
when m = ch.receive?
when m = ch2.receive?
w.check
typeof(m).should eq(Bool?)
m.should be_nil
end
end
end
end
context "non-blocking nil-on-close single-channel" do
it "types and exec when" do
ch = Channel(String).new
spawn_and_check(->{ ch.send "foo" }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should eq("foo")
else
end
end
end
it "exec else if no message was ready" do
ch = Channel(String).new
spawn_and_check(->{ nil }) do |w|
select
when m = ch.receive?
else
w.check
end
end
end
it "types and exec when with nil if channel was closed" do
ch = Channel(String).new
spawn_and_check(->{ ch.close }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should be_nil
else
end
end
end
end
context "non-blocking nil-on-close multi-channel" do
it "types and exec when (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.send "foo" }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should eq("foo")
when m = ch2.receive?
else
end
end
end
it "types and exec when (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.send true }) do |w|
select
when m = ch.receive?
when m = ch2.receive?
w.check
typeof(m).should eq(Bool?)
m.should eq(true)
else
end
end
end
it "types and exec when with nil if channel was closed (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.close }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should be_nil
when m = ch2.receive?
else
end
end
end
it "types and exec when with nil if channel was closed (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.close }) do |w|
select
when m = ch.receive?
when m = ch2.receive?
w.check
typeof(m).should eq(Bool?)
m.should be_nil
else
end
end
end
it "types and exec when with nil if channel is closed while waiting (1)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch.close }) do |w|
select
when m = ch.receive?
w.check
typeof(m).should eq(String?)
m.should be_nil
when m = ch2.receive?
else
end
end
end
it "types and exec when with nil if channel is closed while waiting (2)" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ ch2.close }) do |w|
select
when m = ch.receive?
when m = ch2.receive?
w.check
typeof(m).should eq(Bool?)
m.should be_nil
else
end
end
end
it "exec else if no message was ready" do
ch = Channel(String).new
ch2 = Channel(Bool).new
spawn_and_check(->{ nil }) do |w|
select
when m = ch.receive?
when m = ch2.receive?
else
w.check
end
end
end
end
end
|
