168 lines
5.7 KiB
Ruby
168 lines
5.7 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Experiment do
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subject { build(:experiment) }
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describe 'associations' do
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it { is_expected.to have_many(:experiment_users) }
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end
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describe 'validations' do
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it { is_expected.to validate_presence_of(:name) }
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it { is_expected.to validate_uniqueness_of(:name) }
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it { is_expected.to validate_length_of(:name).is_at_most(255) }
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end
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describe '.add_user' do
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let_it_be(:experiment_name) { :experiment_key }
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let_it_be(:user) { 'a user' }
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let_it_be(:group) { 'a group' }
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subject(:add_user) { described_class.add_user(experiment_name, group, user) }
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context 'when an experiment with the provided name does not exist' do
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it 'creates a new experiment record' do
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allow_next_instance_of(described_class) do |experiment|
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allow(experiment).to receive(:record_user_and_group).with(user, group)
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end
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expect { add_user }.to change(described_class, :count).by(1)
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end
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it 'forwards the user and group_type to the instance' do
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expect_next_instance_of(described_class) do |experiment|
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expect(experiment).to receive(:record_user_and_group).with(user, group)
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end
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add_user
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end
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end
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context 'when an experiment with the provided name already exists' do
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let_it_be(:experiment) { create(:experiment, name: experiment_name) }
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it 'does not create a new experiment record' do
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allow_next_found_instance_of(described_class) do |experiment|
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allow(experiment).to receive(:record_user_and_group).with(user, group)
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end
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expect { add_user }.not_to change(described_class, :count)
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end
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it 'forwards the user and group_type to the instance' do
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expect_next_found_instance_of(described_class) do |experiment|
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expect(experiment).to receive(:record_user_and_group).with(user, group)
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end
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add_user
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end
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end
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end
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describe '.record_conversion_event' do
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let_it_be(:user) { build(:user) }
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let(:experiment_key) { :test_experiment }
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subject(:record_conversion_event) { described_class.record_conversion_event(experiment_key, user) }
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context 'when no matching experiment exists' do
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it 'creates the experiment and uses it' do
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expect_next_instance_of(described_class) do |experiment|
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expect(experiment).to receive(:record_conversion_event_for_user)
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end
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expect { record_conversion_event }.to change { described_class.count }.by(1)
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end
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context 'but we are unable to successfully create one' do
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let(:experiment_key) { nil }
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it 'raises a RecordInvalid error' do
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expect { record_conversion_event }.to raise_error(ActiveRecord::RecordInvalid)
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end
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end
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end
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context 'when a matching experiment already exists' do
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before do
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create(:experiment, name: experiment_key)
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end
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it 'sends record_conversion_event_for_user to the experiment instance' do
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expect_next_found_instance_of(described_class) do |experiment|
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expect(experiment).to receive(:record_conversion_event_for_user).with(user)
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end
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record_conversion_event
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end
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end
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end
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describe '#record_conversion_event_for_user' do
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let_it_be(:user) { create(:user) }
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let_it_be(:experiment) { create(:experiment) }
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subject(:record_conversion_event_for_user) { experiment.record_conversion_event_for_user(user) }
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context 'when no existing experiment_user record exists for the given user' do
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it 'does not update or create an experiment_user record' do
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expect { record_conversion_event_for_user }.not_to change { ExperimentUser.all.to_a }
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end
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end
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context 'when an existing experiment_user exists for the given user' do
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context 'but it has already been converted' do
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let!(:experiment_user) { create(:experiment_user, experiment: experiment, user: user, converted_at: 2.days.ago) }
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it 'does not update the converted_at value' do
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expect { record_conversion_event_for_user }.not_to change { experiment_user.converted_at }
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end
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end
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context 'and it has not yet been converted' do
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let(:experiment_user) { create(:experiment_user, experiment: experiment, user: user) }
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it 'updates the converted_at value' do
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expect { record_conversion_event_for_user }.to change { experiment_user.reload.converted_at }
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end
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end
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end
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end
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describe '#record_user_and_group' do
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let_it_be(:experiment) { create(:experiment) }
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let_it_be(:user) { create(:user) }
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let(:group) { :control }
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subject(:record_user_and_group) { experiment.record_user_and_group(user, group) }
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context 'when an experiment_user does not yet exist for the given user' do
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it 'creates a new experiment_user record' do
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expect { record_user_and_group }.to change(ExperimentUser, :count).by(1)
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end
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it 'assigns the correct group_type to the experiment_user' do
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record_user_and_group
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expect(ExperimentUser.last.group_type).to eq('control')
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end
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end
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context 'when an experiment_user already exists for the given user' do
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before do
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# Create an existing experiment_user for this experiment and the :control group
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experiment.record_user_and_group(user, :control)
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end
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it 'does not create a new experiment_user record' do
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expect { record_user_and_group }.not_to change(ExperimentUser, :count)
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end
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context 'but the group_type has changed' do
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let(:group) { :experimental }
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it 'updates the existing experiment_user record' do
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expect { record_user_and_group }.to change { ExperimentUser.last.group_type }
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end
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end
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end
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end
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end
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