Sha256: 53a6282ad528c3df55de111075e472ea9a7183cae95fb9040062b5f530e89cf6
Contents?: true
Size: 912 Bytes
Versions: 15
Compression:
Stored size: 912 Bytes
Contents
require 'promise'
describe 'Promise#trace' do
it 'calls the block with all the previous results' do
x = 42
Promise.value(1).then { 2 }.then { 3 }.trace {|a, b, c|
x = a + b + c
}
x.should == 6
end
it 'calls the then after the trace' do
x = 42
Promise.value(1).then { 2 }.then { 3 }.trace {|a, b, c|
a + b + c
}.then { |v| x = v }
x.should == 6
end
it 'includes the first value' do
x = 42
Promise.value(1).trace { |a| x = a }
x.should == 1
end
it 'works after a when' do
x = 42
Promise.value(1).then {
Promise.when Promise.value(2), Promise.value(3)
}.trace {|a, b|
x = a + b[0] + b[1]
}
x.should == 6
end
it 'raises an exception when the promise has already been chained' do
p = Promise.value(2)
p.then {}
proc {
p.trace {}
}.should raise_error(ArgumentError)
end
end
Version data entries
15 entries across 15 versions & 2 rubygems