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require 'spec_helper'
describe Virtus::Attribute::Collection, '#coerce' do
subject { object.coerce(input) }
context 'when input is an array' do
context 'when member type is a primitive' do
fake(:coercer) { Virtus::Attribute::Coercer }
fake(:member_type) { Virtus::Attribute }
let(:member_primitive) { Integer }
let(:input) { ['1', '2'] }
let(:object) {
described_class.build(Array[member_primitive], :coercer => coercer, :member_type => member_type)
}
it 'uses coercer to coerce members' do
mock(coercer).call(input) { input }
mock(member_type).finalize { member_type }
mock(member_type).coerce('1') { 1 }
mock(member_type).coerce('2') { 2 }
expect(subject).to eq([1, 2])
expect(member_type).to have_received.coerce('1')
expect(member_type).to have_received.coerce('2')
end
end
context 'when member type is an EV' do
let(:member_primitive) { Struct.new(:id) }
let(:input) { [1, 2] }
let(:object) { described_class.build(Array[member_primitive]) }
it 'coerces members' do
expect(subject).to eq([member_primitive.new(1), member_primitive.new(2)])
end
end
context 'when member type is a hash with key/value coercion' do
let(:member_primitive) { Hash[String => Integer] }
let(:member_attribute) { Virtus::Attribute.build(member_primitive) }
let(:input) { [{:one => '1'}, {:two => '2'}] }
let(:output) { [member_attribute.coerce(input.first), member_attribute.coerce(input.last)] }
let(:object) { described_class.build(Array[member_primitive]) }
it 'coerces members' do
expect(subject).to eq(output)
end
end
end
context 'when input is nil' do
let(:input) { nil }
fake(:coercer) { Virtus::Attribute::Coercer }
fake(:member_type) { Virtus::Attribute }
let(:member_primitive) { Integer }
let(:object) {
described_class.build(
Array[member_primitive], coercer: coercer, member_type: member_type
)
}
it 'returns nil' do
mock(coercer).call(input) { input }
expect(subject).to be(input)
end
end
end
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