148 lines
3.9 KiB
Ruby
148 lines
3.9 KiB
Ruby
# frozen_string_literal: true
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require 'fast_spec_helper'
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RSpec.describe DeclarativeEnum do
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let(:enum_module) do
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Module.new do
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extend DeclarativeEnum
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key :my_enum
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name 'MyEnumName'
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description "Enum description"
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define do
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foo value: 0, description: 'description of foo'
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bar value: 1, description: 'description of bar'
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end
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end
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end
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let(:original_definition) do
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{
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foo: { description: 'description of foo', value: 0 },
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bar: { description: 'description of bar', value: 1 }
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}
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end
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describe '.key' do
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subject(:key) { enum_module.key(new_key) }
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context 'when the argument is set' do
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let(:new_key) { :new_enum_key }
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it 'changes the key' do
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expect { key }.to change { enum_module.key }.from(:my_enum).to(:new_enum_key)
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end
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end
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context 'when the argument is `nil`' do
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let(:new_key) { nil }
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it { is_expected.to eq(:my_enum) }
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end
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end
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describe '.name' do
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subject(:name) { enum_module.name(new_name) }
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context 'when the argument is set' do
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let(:new_name) { 'NewMyEnumName' }
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it 'changes the name' do
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expect { name }.to change { enum_module.name }.from('MyEnumName').to('NewMyEnumName')
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end
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end
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context 'when the argument is `nil`' do
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let(:new_name) { nil }
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it { is_expected.to eq('MyEnumName') }
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end
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end
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describe '.description' do
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subject(:description) { enum_module.description(new_description) }
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context 'when the argument is set' do
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let(:new_description) { 'New enum description' }
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it 'changes the description' do
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expect { description }.to change { enum_module.description }.from('Enum description').to('New enum description')
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end
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end
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context 'when the argument is `nil`' do
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let(:new_description) { nil }
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it { is_expected.to eq('Enum description') }
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end
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end
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describe '.define' do
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subject(:define) { enum_module.define(&block) }
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context 'when there is a block given' do
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context 'when the given block tries to register the same key' do
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let(:block) do
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proc do
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foo value: 2, description: 'description of foo'
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end
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end
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it 'raises a `KeyCollisionError`' do
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expect { define }.to raise_error(DeclarativeEnum::Builder::KeyCollisionError)
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end
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end
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context 'when the given block does not try to register the same key' do
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let(:expected_new_definition) { original_definition.merge(zoo: { description: 'description of zoo', value: 0 }) }
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let(:block) do
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proc do
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zoo value: 0, description: 'description of zoo'
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end
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end
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it 'appends the new definition' do
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expect { define }.to change { enum_module.definition }.from(original_definition).to(expected_new_definition)
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end
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end
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end
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context 'when there is no block given' do
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let(:block) { nil }
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it 'raises a LocalJumpError' do
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expect { define }.to raise_error(LocalJumpError)
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end
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end
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end
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describe '.definition' do
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subject { enum_module.definition }
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it { is_expected.to eq(original_definition) }
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end
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describe 'extending the enum module' do
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let(:extended_definition) { original_definition.merge(zoo: { value: 2, description: 'description of zoo' }) }
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let(:new_enum_module) do
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Module.new do
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extend DeclarativeEnum
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define do
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zoo value: 2, description: 'description of zoo'
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end
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end
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end
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subject(:prepend_new_enum_module) { enum_module.prepend(new_enum_module) }
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it 'extends the values of the base enum module' do
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expect { prepend_new_enum_module }.to change { enum_module.definition }.from(original_definition)
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.to(extended_definition)
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end
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end
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end
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