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require 'spec_helper'
require 'set'
describe Immutable do
expectations = [
# [Ruby, Immutable]
[ { 'a' => 1,
'b' => [2, {'c' => 3}, 4],
'd' => ::Set.new([5, 6, 7]),
'e' => {'f' => 8, 'g' => 9},
'h' => Regexp.new('ijk') },
Immutable::Hash[
'a' => 1,
'b' => Immutable::Vector[2, Immutable::Hash['c' => 3], 4],
'd' => Immutable::Set[5, 6, 7],
'e' => Immutable::Hash['f' => 8, 'g' => 9],
'h' => Regexp.new('ijk') ] ],
[ {}, Immutable::Hash[] ],
[ {'a' => 1, 'b' => 2, 'c' => 3}, Immutable::Hash['a' => 1, 'b' => 2, 'c' => 3] ],
[ [], Immutable::Vector[] ],
[ [1, 2, 3], Immutable::Vector[1, 2, 3] ],
[ ::Set.new, Immutable::Set[] ],
[ ::Set.new([1, 2, 3]), Immutable::Set[1, 2, 3] ],
[ 42, 42 ],
[ STDOUT, STDOUT ],
# Struct conversion is one-way (from Ruby core Struct to Immutable::Hash), not back again!
[ Struct::Customer.new, Immutable::Hash[name: nil, address: nil], true ],
[ Struct::Customer.new('Dave', '123 Main'), Immutable::Hash[name: 'Dave', address: '123 Main'], true ]
]
describe '.from' do
expectations.each do |input, expected_result|
context "with #{input.inspect} as input" do
it "should return #{expected_result.inspect}" do
Immutable.from(input).should eql(expected_result)
end
end
end
context 'with mixed object' do
it 'should return Immutable data' do
input = {
'a' => 'b',
'c' => {'d' => 'e'},
'f' => Immutable::Vector['g', 'h', []],
'i' => Immutable::Hash['j' => {}, 'k' => Immutable::Set[[], {}]] }
expected_result = Immutable::Hash[
'a' => 'b',
'c' => Immutable::Hash['d' => 'e'],
'f' => Immutable::Vector['g', 'h', Immutable::EmptyVector],
'i' => Immutable::Hash['j' => Immutable::EmptyHash, 'k' => Immutable::Set[Immutable::EmptyVector, Immutable::EmptyHash]] ]
Immutable.from(input).should eql(expected_result)
end
end
end
describe '.to_ruby' do
expectations.each do |expected_result, input, one_way|
next if one_way
context "with #{input.inspect} as input" do
it "should return #{expected_result.inspect}" do
Immutable.to_ruby(input).should eql(expected_result)
end
end
end
context 'with Immutable::Deque[] as input' do
it 'should return []' do
Immutable.to_ruby(Immutable::Deque[]).should eql([])
end
end
context 'with Immutable::Deque[Immutable::Hash["a" => 1]] as input' do
it 'should return [{"a" => 1}]' do
Immutable.to_ruby(Immutable::Deque[Immutable::Hash['a' => 1]]).should eql([{'a' => 1}])
end
end
context 'with Immutable::SortedSet[] as input' do
it 'should return ::SortedSet.new' do
Immutable.to_ruby(Immutable::SortedSet[]).should == ::SortedSet.new
end
end
context 'with Immutable::SortedSet[1, 2, 3] as input' do
it 'should return ::SortedSet.new' do
Immutable.to_ruby(Immutable::SortedSet[1, 2, 3]).should == ::SortedSet.new([1, 2, 3])
end
end
context 'with mixed object' do
it 'should return Ruby data structures' do
input = Immutable::Hash[
'a' => 'b',
'c' => {'d' => 'e'},
'f' => Immutable::Vector['g', 'h'],
'i' => {'j' => Immutable::EmptyHash, 'k' => Set.new([Immutable::EmptyVector, Immutable::EmptyHash])}]
expected_result = {
'a' => 'b',
'c' => {'d' => 'e'},
'f' => ['g', 'h'],
'i' => {'j' => {}, 'k' => Set.new([[], {}])} }
Immutable.to_ruby(input).should eql(expected_result)
end
end
end
end
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