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describe Unparser::Anima do
let(:object) { described_class.new(:foo) }
describe '#attributes_hash' do
let(:value) { double('Value') }
let(:instance) { double(foo: value) }
subject { object.attributes_hash(instance) }
it { should eql(foo: value) }
end
describe '#remove' do
let(:object) { described_class.new(:foo, :bar) }
context 'with single attribute' do
subject { object.remove(:bar) }
it { should eql(described_class.new(:foo)) }
end
context 'with multiple attributes' do
subject { object.remove(:foo, :bar) }
it { should eql(described_class.new) }
end
context 'with inexisting attribute' do
subject { object.remove(:baz) }
it { should eql(object) }
end
end
describe '#add' do
context 'with single attribute' do
subject { object.add(:bar) }
it { should eql(described_class.new(:foo, :bar)) }
end
context 'with multiple attributes' do
subject { object.add(:bar, :baz) }
it { should eql(described_class.new(:foo, :bar, :baz)) }
end
context 'with duplicate attribute ' do
subject { object.add(:foo) }
it { should eql(object) }
end
end
describe '#attributes' do
subject { object.attributes }
it { should eql([Unparser::Anima::Attribute.new(:foo)]) }
it { should be_frozen }
end
describe '#included' do
let(:target) do
object = self.object
Class.new do
include object
end
end
let(:value) { double('Value') }
let(:instance) { target.new(foo: value) }
let(:instance_b) { target.new(foo: value) }
let(:instance_c) { target.new(foo: double('Bar')) }
context 'on instance' do
subject { instance }
it { should eql(instance_b) }
it { should_not eql(instance_c) }
it 'returns expected value' do
expect(instance.foo).to be(value)
end
end
context 'on singleton' do
subject { target }
it 'should define attribute hash reader' do
expect(instance.to_h).to eql(foo: value)
end
specify { expect(subject.anima).to be(object) }
end
end
describe '#initialize_instance' do
let(:object) { Unparser::Anima.new(:foo, :bar) }
let(:target) { Object.new }
let(:foo) { double('Foo') }
let(:bar) { double('Bar') }
subject { object.initialize_instance(target, attribute_hash) }
context 'when all keys are present in attribute hash' do
let(:attribute_hash) { { foo: foo, bar: bar } }
it 'should initialize target instance variables' do
subject
expect(
target
.instance_variables
.map(&:to_sym)
.to_set
).to eql(%i[@foo @bar].to_set)
expect(target.instance_variable_get(:@foo)).to be(foo)
expect(target.instance_variable_get(:@bar)).to be(bar)
end
it_should_behave_like 'a command method'
end
context 'when an extra key is present in attribute hash' do
let(:attribute_hash) { { foo: foo, bar: bar, baz: double('Baz') } }
it 'should raise error' do
expect { subject }.to raise_error(
Unparser::Anima::Error,
Unparser::Anima::Error.new(target.class, [], [:baz]).message
)
end
context 'and the extra key is falsy' do
let(:attribute_hash) { { foo: foo, bar: bar, nil => double('Baz') } }
it 'should raise error' do
expect { subject }.to raise_error(
Unparser::Anima::Error,
Unparser::Anima::Error.new(target.class, [], [nil]).message
)
end
end
end
context 'when a key is missing in attribute hash' do
let(:attribute_hash) { { bar: bar } }
it 'should raise error' do
expect { subject }.to raise_error(
Unparser::Anima::Error.new(target.class, [:foo], []).message
)
end
end
end
describe 'using super in initialize' do
subject { klass.new }
let(:klass) do
Class.new do
include Unparser::Anima.new(:foo)
def initialize(attributes = { foo: :bar })
super
end
end
end
specify { expect(subject.foo).to eql(:bar) }
end
describe '#to_h on an anima infected instance' do
subject { instance.to_h }
let(:instance) { klass.new(params) }
let(:params) { Hash[foo: :bar] }
let(:klass) do
Class.new do
include Unparser::Anima.new(:foo)
end
end
it { should eql(params) }
end
describe '#with' do
subject { object.with(attributes) }
let(:klass) do
Class.new do
include Unparser::Anima.new(:foo, :bar)
end
end
let(:object) { klass.new(foo: 1, bar: 2) }
context 'with empty attributes' do
let(:attributes) { {} }
it { should eql(object) }
end
context 'with updated attribute' do
let(:attributes) { { foo: 3 } }
it { should eql(klass.new(foo: 3, bar: 2)) }
end
end
end
|
