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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Experiment do
subject { build(:experiment) }
describe 'associations' do
it { is_expected.to have_many(:experiment_users) }
it { is_expected.to have_many(:users) }
it { is_expected.to have_many(:control_group_users) }
it { is_expected.to have_many(:experimental_group_users) }
describe 'control_group_users and experimental_group_users' do
let(:experiment) { create(:experiment) }
let(:control_group_user) { build(:user) }
let(:experimental_group_user) { build(:user) }
before do
experiment.control_group_users << control_group_user
experiment.experimental_group_users << experimental_group_user
end
describe 'control_group_users' do
subject { experiment.control_group_users }
it { is_expected.to contain_exactly(control_group_user) }
end
describe 'experimental_group_users' do
subject { experiment.experimental_group_users }
it { is_expected.to contain_exactly(experimental_group_user) }
end
end
end
describe 'validations' do
it { is_expected.to validate_presence_of(:name) }
it { is_expected.to validate_uniqueness_of(:name) }
it { is_expected.to validate_length_of(:name).is_at_most(255) }
end
describe '.add_user' do
let(:name) { :experiment_key }
let(:user) { build(:user) }
let!(:experiment) { create(:experiment, name: name) }
subject { described_class.add_user(name, :control, user) }
describe 'creating a new experiment record' do
context 'an experiment with the provided name already exists' do
it 'does not create a new experiment record' do
expect { subject }.not_to change(Experiment, :count)
end
end
context 'an experiment with the provided name does not exist yet' do
let(:experiment) { nil }
it 'creates a new experiment record' do
expect { subject }.to change(Experiment, :count).by(1)
end
end
end
describe 'creating a new experiment_user record' do
context 'an experiment_user record for this experiment already exists' do
before do
subject
end
it 'does not create a new experiment_user record' do
expect { subject }.not_to change(ExperimentUser, :count)
end
end
context 'an experiment_user record for this experiment does not exist yet' do
it 'creates a new experiment_user record' do
expect { subject }.to change(ExperimentUser, :count).by(1)
end
it 'assigns the correct group_type to the experiment_user' do
expect { subject }.to change { experiment.control_group_users.count }.by(1)
end
end
end
end
describe '#add_control_user' do
let(:experiment) { create(:experiment) }
let(:user) { build(:user) }
subject { experiment.add_control_user(user) }
it 'creates a new experiment_user record and assigns the correct group_type' do
expect { subject }.to change { experiment.control_group_users.count }.by(1)
end
end
describe '#add_experimental_user' do
let(:experiment) { create(:experiment) }
let(:user) { build(:user) }
subject { experiment.add_experimental_user(user) }
it 'creates a new experiment_user record and assigns the correct group_type' do
expect { subject }.to change { experiment.experimental_group_users.count }.by(1)
end
end
end
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