Sha256: 9cfa9bb14b5ac159cdc900eef339b1eb69c91886da60d459d8e2bb78e40a5a3a
Contents?: true
Size: 895 Bytes
Versions: 49
Compression:
Stored size: 895 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 with trace! if a promise has already been chained' do
p = Promise.new
p.then! {}
proc { p.trace! {} }.should raise_error(ArgumentError)
end
end
Version data entries
49 entries across 49 versions & 1 rubygems