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Contents
require 'spec_helper'
describe Computation do
it 'should trigger again when a dependent changes' do
a = ReactiveHash.new
values = []
-> { values << a[0] }.watch!
expect(values).to eq([nil])
a[0] = 'one'
Computation.flush!
expect(values).to eq([nil, 'one'])
a[0] = 'two'
Computation.flush!
expect(values).to eq([nil, 'one', 'two'])
end
it 'should not trigger after the computation is stopped' do
a = ReactiveHash.new
values = []
computation = -> { values << a[0] }.watch!
expect(values).to eq([nil])
a[0] = 'one'
Computation.flush!
expect(values).to eq([nil, 'one'])
computation.stop
a[0] = 'two'
Computation.flush!
expect(values).to eq([nil, 'one'])
end
it 'should support nested watches' do
a = ReactiveHash.new
values = []
-> do
values << a[0]
-> do
values << a[1]
end.watch!
end.watch!
expect(values).to eq([nil,nil])
a[1] = 'inner'
Computation.flush!
expect(values).to eq([nil,nil,'inner'])
a[0] = 'outer'
Computation.flush!
expect(values).to eq([nil,nil,'inner','outer','inner'])
end
end
Version data entries
14 entries across 14 versions & 1 rubygems