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Contents
require 'promise'
describe 'Promise#rescue' do
it 'calls the block when the promise has already been rejected' do
x = 42
Promise.error(23).rescue { |v| x = v }
x.should == 23
end
it 'calls the block when the promise is rejected' do
a = Promise.new
x = 42
a.rescue { |v| x = v }
a.reject(23)
x.should == 23
end
it 'does not call then blocks when the promise is rejected' do
x = 42
y = 23
Promise.error(23).then { y = 42 }.rescue { |v| x = v }
x.should == 23
y.should == 23
end
it 'does not call subsequent rescue blocks' do
x = 42
Promise.error(23).rescue { |v| x = v }.rescue { x = 42 }
x.should == 23
end
it 'can be called multiple times on the same promise' do
p = Promise.error(2)
x = 1
p.then { x += 1 }
p.rescue { x += 3 }
p.rescue { x += 3 }
x.should == 7
end
it 'raises with rescue! if a promise has already been chained' do
p = Promise.new
p.then! {}
proc { p.rescue! {} }.should raise_error(ArgumentError)
end
end
Version data entries
49 entries across 49 versions & 1 rubygems