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# frozen_string_literal: true
require 'spec_helper'
describe StubFeatureFlags do
before do
# reset stub introduced by `stub_feature_flags`
allow(Feature).to receive(:enabled?).and_call_original
end
context 'if not stubbed' do
it 'features are disabled by default' do
expect(Feature.enabled?(:test_feature)).to eq(false)
end
end
describe '#stub_feature_flags' do
using RSpec::Parameterized::TableSyntax
let(:feature_name) { :test_feature }
context 'when checking global state' do
where(:feature_actors, :expected_result) do
false | false
true | true
:A | false
%i[A] | false
%i[A B] | false
end
with_them do
before do
stub_feature_flags(feature_name => feature_actors)
end
it { expect(Feature.enabled?(feature_name)).to eq(expected_result) }
it { expect(Feature.disabled?(feature_name)).not_to eq(expected_result) }
context 'default_enabled does not impact feature state' do
it { expect(Feature.enabled?(feature_name, default_enabled: true)).to eq(expected_result) }
it { expect(Feature.disabled?(feature_name, default_enabled: true)).not_to eq(expected_result) }
end
end
end
context 'when checking scoped state' do
where(:feature_actors, :tested_actor, :expected_result) do
false | nil | false
true | nil | true
false | :A | false
true | :A | true
:A | nil | false
:A | :A | true
:A | :B | false
%i[A] | nil | false
%i[A] | :A | true
%i[A] | :B | false
%i[A B] | nil | false
%i[A B] | :A | true
%i[A B] | :B | true
end
with_them do
before do
stub_feature_flags(feature_name => feature_actors)
end
it { expect(Feature.enabled?(feature_name, tested_actor)).to eq(expected_result) }
it { expect(Feature.disabled?(feature_name, tested_actor)).not_to eq(expected_result) }
context 'default_enabled does not impact feature state' do
it { expect(Feature.enabled?(feature_name, tested_actor, default_enabled: true)).to eq(expected_result) }
it { expect(Feature.disabled?(feature_name, tested_actor, default_enabled: true)).not_to eq(expected_result) }
end
end
end
context 'type handling' do
context 'raises error' do
where(:feature_actors) do
['string', 1, 1.0, OpenStruct.new]
end
with_them do
subject { stub_feature_flags(feature_name => feature_actors) }
it { expect { subject }.to raise_error(ArgumentError, /accepts only/) }
end
end
context 'does not raise error' do
where(:feature_actors) do
[true, false, nil, :symbol, double, User.new]
end
with_them do
subject { stub_feature_flags(feature_name => feature_actors) }
it { expect { subject }.not_to raise_error }
end
end
end
it 'subsquent run changes state' do
# enable FF only on A
stub_feature_flags(test_feature: %i[A])
expect(Feature.enabled?(:test_feature)).to eq(false)
expect(Feature.enabled?(:test_feature, :A)).to eq(true)
expect(Feature.enabled?(:test_feature, :B)).to eq(false)
# enable FF only on B
stub_feature_flags(test_feature: %i[B])
expect(Feature.enabled?(:test_feature)).to eq(false)
expect(Feature.enabled?(:test_feature, :A)).to eq(false)
expect(Feature.enabled?(:test_feature, :B)).to eq(true)
# enable FF on all
stub_feature_flags(test_feature: true)
expect(Feature.enabled?(:test_feature)).to eq(true)
expect(Feature.enabled?(:test_feature, :A)).to eq(true)
expect(Feature.enabled?(:test_feature, :B)).to eq(true)
# disable FF on all
stub_feature_flags(test_feature: false)
expect(Feature.enabled?(:test_feature)).to eq(false)
expect(Feature.enabled?(:test_feature, :A)).to eq(false)
expect(Feature.enabled?(:test_feature, :B)).to eq(false)
end
end
end
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