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base_spec.rb
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base_spec.rb
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# coding: utf-8
require 'spec_helper'
InteractionWithFilter = Class.new(TestInteraction) do
float :thing
end
AddInteraction = Class.new(TestInteraction) do
float :x, :y
def execute
x + y
end
end
InterruptInteraction = Class.new(TestInteraction) do
model :x, :y,
class: Object,
default: nil
def execute
compose(AddInteraction, inputs)
end
end
describe ActiveInteraction::Base do
include_context 'interactions'
subject(:interaction) { described_class.new(inputs) }
describe '.new(inputs = {})' do
it 'does not allow :_interaction_* as an option' do
key = :"_interaction_#{SecureRandom.hex}"
inputs.merge!(key => nil)
expect do
interaction
end.to raise_error ActiveInteraction::InvalidValueError
end
it 'does not allow "_interaction_*" as an option' do
key = "_interaction_#{SecureRandom.hex}"
inputs.merge!(key => nil)
expect do
interaction
end.to raise_error ActiveInteraction::InvalidValueError
end
context 'with invalid inputs' do
let(:inputs) { nil }
it 'raises an error' do
expect { interaction }.to raise_error ArgumentError
end
end
context 'with an attribute' do
let(:described_class) do
Class.new(TestInteraction) do
attr_reader :thing
validates :thing, presence: true
end
end
let(:thing) { SecureRandom.hex }
context 'failing validations' do
before { inputs.merge!(thing: nil) }
it 'returns an invalid outcome' do
expect(interaction).to be_invalid
end
end
context 'passing validations' do
before { inputs.merge!(thing: thing) }
it 'returns a valid outcome' do
expect(interaction).to be_valid
end
it 'sets the attribute' do
expect(interaction.thing).to eq thing
end
end
end
describe 'with a filter' do
let(:described_class) { InteractionWithFilter }
context 'failing validations' do
before { inputs.merge!(thing: thing) }
context 'with an invalid value' do
let(:thing) { 'a' }
it 'sets the attribute to the filtered value' do
expect(interaction.thing).to equal thing
end
end
context 'without a value' do
let(:thing) { nil }
it 'sets the attribute to the filtered value' do
expect(interaction.thing).to equal thing
end
end
end
context 'passing validations' do
before { inputs.merge!(thing: 1) }
it 'sets the attribute to the filtered value' do
expect(interaction.thing).to eql 1.0
end
end
end
end
describe '.desc' do
let(:desc) { SecureRandom.hex }
it 'returns nil' do
expect(described_class.desc).to be_nil
end
it 'returns the description' do
expect(described_class.desc(desc)).to eq desc
end
it 'saves the description' do
described_class.desc(desc)
expect(described_class.desc).to eq desc
end
end
describe '.method_missing(filter_type, *args, &block)' do
it 'raises an error for an invalid filter type' do
expect do
Class.new(TestInteraction) do
not_a_valid_filter_type :thing
end
end.to raise_error NoMethodError
end
it do
expect do
Class.new(TestInteraction) do
float :_interaction_thing
end
end.to raise_error ActiveInteraction::InvalidFilterError
end
context 'with a filter' do
let(:described_class) { InteractionWithFilter }
it 'adds an attr_reader' do
expect(interaction).to respond_to :thing
end
it 'adds an attr_writer' do
expect(interaction).to respond_to :thing=
end
end
context 'with multiple filters' do
let(:described_class) do
Class.new(TestInteraction) do
float :thing1, :thing2
end
end
%w(thing1 thing2).each do |thing|
it "adds an attr_reader for #{thing}" do
expect(interaction).to respond_to thing
end
it "adds an attr_writer for #{thing}" do
expect(interaction).to respond_to "#{thing}="
end
end
end
end
context 'with a filter' do
let(:described_class) { InteractionWithFilter }
let(:thing) { rand }
describe '.run(inputs = {})' do
it "returns an instance of #{described_class}" do
expect(outcome).to be_a described_class
end
context 'setting the result' do
let(:described_class) do
Class.new(TestInteraction) do
boolean :attribute
validate do
@_interaction_result = SecureRandom.hex
errors.add(:attribute, SecureRandom.hex)
end
end
end
it 'sets the result to nil' do
expect(outcome).to be_invalid
expect(result).to be_nil
end
end
context 'failing validations' do
it 'returns an invalid outcome' do
expect(outcome).to_not be_valid
end
it 'sets the result to nil' do
expect(result).to be_nil
end
end
context 'passing validations' do
before { inputs.merge!(thing: thing) }
context 'failing runtime validations' do
before do
@execute = described_class.instance_method(:execute)
described_class.send(:define_method, :execute) do
errors.add(:thing, 'error')
errors.add_sym(:thing, :error, 'error')
end
end
after do
silence_warnings do
described_class.send(:define_method, :execute, @execute)
end
end
it 'returns an invalid outcome' do
expect(outcome).to be_invalid
end
it 'sets the result to nil' do
expect(result).to be_nil
end
it 'has errors' do
expect(outcome.errors.messages[:thing]).to eq %w(error error)
end
it 'has symbolic errors' do
expect(outcome.errors.symbolic[:thing]).to eq [:error]
end
end
it 'returns a valid outcome' do
expect(outcome).to be_valid
end
it 'sets the result' do
expect(result[:thing]).to eq thing
end
it 'calls ActiveRecord::Base.transaction' do
allow(ActiveRecord::Base).to receive(:transaction)
outcome
expect(ActiveRecord::Base).to have_received(:transaction)
.with(no_args)
end
end
end
describe '.run!(inputs = {})' do
subject(:result) { described_class.run!(inputs) }
context 'failing validations' do
it 'raises an error' do
expect do
result
end.to raise_error ActiveInteraction::InvalidInteractionError
end
end
context 'passing validations' do
before { inputs.merge!(thing: thing) }
it 'returns the result' do
expect(result[:thing]).to eq thing
end
end
end
end
describe '#inputs' do
let(:described_class) { InteractionWithFilter }
let(:other_val) { SecureRandom.hex }
let(:inputs) { { thing: 1, other: other_val } }
it 'casts filtered inputs' do
expect(interaction.inputs[:thing]).to eql 1.0
end
it 'strips non-filtered inputs' do
expect(interaction.inputs).to_not have_key(:other)
end
end
describe '#compose' do
let(:described_class) { InterruptInteraction }
let(:x) { rand }
let(:y) { rand }
context 'with valid composition' do
before do
inputs.merge!(x: x, y: y)
end
it 'is valid' do
expect(outcome).to be_valid
end
it 'returns the sum' do
expect(result).to eq x + y
end
end
context 'with invalid composition' do
it 'is invalid' do
expect(outcome).to be_invalid
end
it 'has the correct errors' do
expect(outcome.errors[:base])
.to match_array ['X is required', 'Y is required']
end
end
end
describe '#execute' do
it 'raises an error' do
expect { interaction.execute }.to raise_error NotImplementedError
end
end
context 'inheritance' do
let(:described_class) { InteractionWithFilter }
def filters(klass)
klass.filters.keys
end
it 'includes the filters from the superclass' do
expect(filters(Class.new(described_class))).to include :thing
end
it 'does not mutate the filters on the superclass' do
Class.new(described_class) { float :other_thing }
expect(filters(described_class)).to_not include :other_thing
end
end
context 'predicates' do
let(:described_class) { InteractionWithFilter }
it 'responds to the predicate' do
expect(interaction.respond_to?(:thing?)).to be_true
end
context 'without a value' do
it 'returns false' do
expect(interaction.thing?).to be_false
end
end
context 'with a value' do
let(:thing) { rand }
before do
inputs.merge!(thing: thing)
end
it 'returns true' do
expect(interaction.thing?).to be_true
end
end
end
describe '.import_filters' do
shared_context 'import_filters context' do
let(:klass) { AddInteraction }
let(:only) { nil }
let(:except) { nil }
let(:described_class) do
interaction = klass
options = {}
options[:only] = only unless only.nil?
options[:except] = except unless except.nil?
Class.new(TestInteraction) { import_filters interaction, options }
end
end
shared_examples 'import_filters examples' do
include_context 'import_filters context'
it 'imports the filters' do
expect(described_class.filters).to eq klass.filters
.select { |k, _| only.nil? ? true : [*only].include?(k) }
.reject { |k, _| except.nil? ? false : [*except].include?(k) }
end
it 'does not modify the source' do
filters = klass.filters.dup
described_class
expect(klass.filters).to eq filters
end
end
context 'with :only' do
context 'as an Array' do
include_examples 'import_filters examples'
let(:only) { [:x] }
end
context 'as an Symbol' do
include_examples 'import_filters examples'
let(:only) { :x }
end
end
context 'with :except' do
context 'as an Array' do
include_examples 'import_filters examples'
let(:except) { [:x] }
end
context 'as an Symbol' do
include_examples 'import_filters examples'
let(:except) { :x }
end
end
context 'with :only & :except' do
include_examples 'import_filters examples'
let(:only) { [:x] }
let(:except) { [:x] }
end
end
end