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# -*- coding: utf-8 -*-
require_relative 'helper'
describe(Delayer::Deferred) do
include TestUtils
before do
Delayer.default = Delayer.generate_class
end
it "defer with Deferred#next" do
succeed = failure = false
eval_all_events do
Delayer::Deferred::Deferred.new.next{
succeed = true
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert succeed, "Deferred did not executed."
end
it "defer with another Delayer" do
succeed = failure = false
delayer = Delayer.generate_class
eval_all_events(delayer) do
delayer.Deferred.new.next {
succeed = true
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert succeed, "Deferred did not executed."
end
it "error handling" do
succeed = failure = recover = false
uuid = SecureRandom.uuid
eval_all_events do
Delayer::Deferred::Deferred.new.next {
Delayer::Deferred.fail(uuid)
}.next {
succeed = true
}.trap { |value|
failure = value
}.next {
recover = true } end
refute succeed, "Raised exception but it was executed successed route."
assert_equal uuid, failure, "trap block takes incorrect value"
assert recover, "next block did not executed when after trap"
end
it "exception handling" do
succeed = failure = recover = false
eval_all_events do
Delayer::Deferred::Deferred.new.next {
raise 'error test'
}.next {
succeed = true
}.trap {
failure = true
}.next {
recover = true } end
refute succeed, "Raised exception but it was executed successed route."
assert failure, "trap block did not executed"
assert recover, "next block did not executed when after trap"
end
it "wait end of Deferredable if Deferredable block returns Deferredable" do
result = failure = false
delayer = Delayer.generate_class
uuid = SecureRandom.uuid
eval_all_events(delayer) do
delayer.Deferred.new.next{
delayer.Deferred.new.next{
uuid }
}.next{ |value|
result = value
}.trap{ |exception|
failure = exception }
end
assert_equal false, failure
assert_equal uuid, result
end
it "join Deferredable#next after end of previous Deferredable" do
succeed = failure = false
delayer = Delayer.generate_class
deferredable = eval_all_events(delayer) do
delayer.Deferred.new.next {
true
} end
eval_all_events(delayer) do
deferredable.next{ |value|
succeed = value
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert succeed, "Deferred did not executed."
end
it "assign twice" do
succeed = false
delayer = Delayer.generate_class
assert_raises(Delayer::Deferred::MultipleAssignmentError) do
eval_all_events(delayer) do
defer = delayer.Deferred.new.next {
succeed = 0
}
defer.next{ succeed = 1 }
defer.next{ succeed = 2 }
end
end
end
describe "Deferred.when" do
it "give 3 deferred" do
result = failure = false
delayer = Delayer.generate_class
eval_all_events(delayer) do
delayer.Deferred.when(
delayer.Deferred.new.next{ 1 },
delayer.Deferred.new.next{ 2 },
delayer.Deferred.new.next{ 3 }
).next{ |values|
result = values
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert_equal [1,2,3], result
end
it "default deferred" do
result = failure = false
eval_all_events do
Delayer::Deferred::Deferred.when(
Delayer::Deferred::Deferred.new.next{ 1 },
Delayer::Deferred::Deferred.new.next{ 2 },
Delayer::Deferred::Deferred.new.next{ 3 }
).next{ |values|
result = values
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert_equal [1,2,3], result
end
it "give that is not Deferredable" do
result = failure = false
delayer = Delayer.generate_class
assert_raises(TypeError) do
eval_all_events(delayer) do
delayer.Deferred.when(
delayer.Deferred.new.next{ 1 },
2,
delayer.Deferred.new.next{ 3 }
).next{ |values|
result = values
}.trap{ |exception|
failure = exception } end end
assert_equal false, failure
assert_equal false, result
end
it "execute trap block if failed" do
result = failure = false
delayer = Delayer.generate_class
eval_all_events(delayer) do
delayer.Deferred.when(
delayer.Deferred.new.next{ 1 },
delayer.Deferred.new.next{ raise },
delayer.Deferred.new.next{ 3 }
).next{ |values|
result = values
}.trap{ |exception|
failure = exception } end
assert_kind_of RuntimeError, failure
assert_equal false, result
end
it "no deferred given" do
result = failure = false
delayer = Delayer.generate_class
eval_all_events(delayer) do
delayer.Deferred.when().next{ |values|
result = values
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert_empty result
end
it "empty array given" do
result = failure = false
delayer = Delayer.generate_class
eval_all_events(delayer) do
delayer.Deferred.when([]).next{ |values|
result = values
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert_empty result
end
it "no deferred given for default delayer" do
result = failure = false
eval_all_events do
Delayer::Deferred::Deferred.when().next{ |values|
result = values
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert_empty result
end
it "no deferred given for delayer module" do
result = failure = false
eval_all_events do
Delayer::Deferred.when().next{ |values|
result = values
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert_empty result
end
end
describe "cancel" do
it "stops deferred chain" do
succeed = failure = false
delayer = Delayer.generate_class
eval_all_events(delayer) do
delayer.Deferred.new.next {
succeed = true
}.trap{ |exception|
failure = exception }.cancel end
assert_equal false, failure
assert_equal false, succeed, "Deferred executed."
end
end
describe 'recursive delayer' do
it 'Deferred#next call in Deferred.next' do
delayer = Delayer.generate_class
buf = []
erra = errb = errc = nil
eval_all_events(delayer) do
delayer.Deferred.next{
buf << 'begin A'
delayer.run
buf << 'end A'
}.trap{|err|
erra = err
}
delayer.Deferred.next{
buf << 'begin B'
delayer.run
buf << 'end B'
}.trap{|err|
errb = err
}
delayer.Deferred.next{
buf << 'begin C'
delayer.run
buf << 'end C'
}.trap{|err|
errc = err
}
end
refute erra
refute errb
refute errc
assert_includes buf, 'begin A'
assert_includes buf, 'end A'
assert_includes buf, 'begin B'
assert_includes buf, 'end B'
assert_includes buf, 'begin C'
assert_includes buf, 'end C'
end
end
describe "Deferredable#system" do
it "command successed" do
succeed = failure = false
delayer = Delayer.generate_class
eval_all_events(delayer) do
delayer.Deferred.system("/bin/sh", "-c", "exit 0").next{ |value|
succeed = value
}.trap{ |exception|
failure = exception } end
assert_equal false, failure
assert succeed, "next block called"
end
it "command failed" do
succeed = failure = false
delayer = Delayer.generate_class
eval_all_events(delayer) do
delayer.Deferred.system("/bin/sh", "-c", "exit 1").next{ |value|
succeed = value
}.trap{ |exception|
failure = exception } end
refute succeed, "next block did not called"
assert_instance_of Delayer::Deferred::ForeignCommandAborted, failure
assert failure.process.exited?, "command exited"
assert_equal 1, failure.process.exitstatus, "command exit status is 1"
end
end
describe 'Deferredable#+@' do
it 'stops +@ deferred chain, then it returns result after receiver completed' do
delayer = Delayer.generate_class
log = Array.new
eval_all_events(delayer) do
delayer.Deferred.new.next{
log << :a1
b = delayer.Deferred.new.next{
log << :b1 << +delayer.Deferred.new.next{
log << :c1 << +delayer.Deferred.new.next{
log << :d1
:d2
}
:c2
}
:b2
}
log << :a2 << +b << :a3
}
end
assert_equal [:a1, :a2, :b1, :c1, :d1, :d2, :c2, :b2, :a3], log, 'incorrect call order'
end
it 'fails receiver of +@, then fails callee Deferred' do
delayer = Delayer.generate_class
log = Array.new
eval_all_events(delayer) do
delayer.Deferred.new.next{
log << :a1
b = delayer.Deferred.new.next{
log << :b1
delayer.Deferred.fail(:be)
:b2
}
log << :a2 << +b << :a3
}.trap do |err|
log << :ae << err
end
end
assert_equal [:a1, :a2, :b1, :ae, :be], log, 'incorrect call order'
end
end
end
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