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require 'spec_helper'
require 'support/module_context'
def invoke(method)
if subject == object
subject.public_send(method)
else
subject.public_send(method, object)
end
end
shared_examples 'stringify_keys!' do
it 'converts keys to strings' do
object[:abc] = 'abc'
object[123] = '123'
invoke :stringify_keys!
expect((object.keys & %w[abc 123]).size).to eq 2
end
it 'converts nested instances of the same class' do
object[:ab] = dummy_class.new
object[:ab][:cd] = dummy_class.new
object[:ab][:cd][:ef] = 'abcdef'
invoke :stringify_keys!
expect(object).to eq('ab' => { 'cd' => { 'ef' => 'abcdef' } })
end
it 'converts nested hashes' do
object[:ab] = { cd: { ef: 'abcdef' } }
invoke :stringify_keys!
expect(object).to eq('ab' => { 'cd' => { 'ef' => 'abcdef' } })
end
it 'converts nested arrays' do
object[:ab] = []
object[:ab] << dummy_class.new
object[:ab] << dummy_class.new
object[:ab][0][:cd] = 'abcd'
object[:ab][1][:ef] = 'abef'
invoke :stringify_keys!
expect(object).to eq('ab' => [{ 'cd' => 'abcd' }, { 'ef' => 'abef' }])
end
end
shared_examples 'stringify_keys' do
it 'converts keys to strings' do
object[:abc] = 'def'
copy = invoke :stringify_keys
expect(copy['abc']).to eq 'def'
end
it 'does not alter the original' do
object[:abc] = 'def'
copy = invoke :stringify_keys
expect(object.keys).to eq [:abc]
expect(copy.keys).to eq %w[abc]
end
end
describe Hashie::Extensions::StringifyKeys do
include_context 'included hash module'
let(:object) { subject }
describe '#stringify_keys!' do
include_examples 'stringify_keys!'
it 'returns itself' do
expect(subject.stringify_keys!).to eq subject
end
end
context 'class methods' do
subject { described_class }
let(:object) { {} }
describe '.stringify_keys' do
include_examples 'stringify_keys'
end
describe '.stringify_keys!' do
include_examples 'stringify_keys!'
end
end
context 'singleton methods' do
subject { Hash }
let(:object) { subject.new.merge(a: 1, b: { c: 2 }).extend(Hashie::Extensions::StringifyKeys) }
let(:expected_hash) { { 'a' => 1, 'b' => { 'c' => 2 } } }
describe '.stringify_keys' do
it 'does not raise error' do
expect { object.stringify_keys } .not_to raise_error
end
it 'produces expected stringified hash' do
expect(object.stringify_keys).to eq(expected_hash)
end
end
describe '.stringify_keys!' do
it 'does not raise error' do
expect { object.stringify_keys! } .not_to raise_error
end
it 'produces expected stringified hash' do
expect(object.stringify_keys!).to eq(expected_hash)
end
end
end
end
describe Hashie do
let!(:dummy_class) do
klass = Class.new(::Hash)
klass.send :include, Hashie::Extensions::StringifyKeys
klass
end
subject { described_class }
let(:object) { {} }
describe '.stringify_keys' do
include_examples 'stringify_keys'
end
describe '.stringify_keys!' do
include_examples 'stringify_keys!'
end
end
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