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require 'flipper/feature'
RSpec.describe Flipper do
let(:adapter) { Flipper::Adapters::Memory.new }
let(:flipper) { described_class.new(adapter) }
let(:feature) { flipper[:search] }
let(:admin_group) { flipper.group(:admins) }
let(:dev_group) { flipper.group(:devs) }
let(:admin_thing) do
double 'Non Flipper Thing', flipper_id: 1, admin?: true, dev?: false
end
let(:dev_thing) do
double 'Non Flipper Thing', flipper_id: 10, admin?: false, dev?: true
end
let(:admin_truthy_thing) do
double 'Non Flipper Thing', flipper_id: 1, admin?: 'true-ish', dev?: false
end
let(:admin_falsey_thing) do
double 'Non Flipper Thing', flipper_id: 1, admin?: nil, dev?: false
end
let(:pitt) { Flipper::Actor.new(1) }
let(:clooney) { Flipper::Actor.new(10) }
let(:five_percent_of_actors) { flipper.actors(5) }
let(:five_percent_of_time) { flipper.time(5) }
before do
described_class.register(:admins, &:admin?)
described_class.register(:devs, &:dev?)
end
describe '#enable' do
context 'with no arguments' do
before do
@result = feature.enable
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'enables feature for all' do
expect(feature.enabled?).to eq(true)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with a group' do
before do
@result = feature.enable(admin_group)
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'enables feature for non flipper thing in group' do
expect(feature.enabled?(admin_thing)).to eq(true)
end
it 'does not enable feature for non flipper thing in other group' do
expect(feature.enabled?(dev_thing)).to eq(false)
end
it 'enables feature for flipper actor in group' do
expect(feature.enabled?(flipper.actor(admin_thing))).to eq(true)
end
it 'does not enable for flipper actor not in group' do
expect(feature.enabled?(flipper.actor(dev_thing))).to eq(false)
end
it 'does not enable feature for all' do
expect(feature.enabled?).to eq(false)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with an actor' do
before do
@result = feature.enable(pitt)
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'enables feature for actor' do
expect(feature.enabled?(pitt)).to eq(true)
end
it 'does not enable feature for other actors' do
expect(feature.enabled?(clooney)).to eq(false)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with a percentage of actors' do
before do
@result = feature.enable(five_percent_of_actors)
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'enables feature for actor within percentage' do
enabled = (1..100).select do |i|
thing = Flipper::Actor.new(i)
feature.enabled?(thing)
end.size
expect(enabled).to be_within(2).of(5)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with a float percentage of actors' do
before do
@result = feature.enable_percentage_of_actors 5.1
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'enables feature for actor within percentage' do
enabled = (1..100).select do |i|
thing = Flipper::Actor.new(i)
feature.enabled?(thing)
end.size
expect(enabled).to be_within(2).of(5)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with a percentage of time' do
before do
@gate = feature.gate(:percentage_of_time)
@result = feature.enable(five_percent_of_time)
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'enables feature for time within percentage' do
allow(@gate).to receive_messages(rand: 0.04)
expect(feature.enabled?).to eq(true)
end
it 'does not enable feature for time not within percentage' do
allow(@gate).to receive_messages(rand: 0.10)
expect(feature.enabled?).to eq(false)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with argument that has no gate' do
it 'raises error' do
thing = Object.new
expect do
feature.enable(thing)
end.to raise_error(Flipper::GateNotFound, "Could not find gate for #{thing.inspect}")
end
end
end
describe '#disable' do
context 'with no arguments' do
before do
# ensures that time gate is stubbed with result that would be true for pitt
@gate = feature.gate(:percentage_of_time)
allow(@gate).to receive_messages(rand: 0.04)
feature.enable admin_group
feature.enable pitt
feature.enable five_percent_of_actors
feature.enable five_percent_of_time
@result = feature.disable
end
it 'returns true' do
expect(@result).to be(true)
end
it 'disables feature' do
expect(feature.enabled?).to eq(false)
end
it 'disables for individual actor' do
expect(feature.enabled?(pitt)).to eq(false)
end
it 'disables actor in group' do
expect(feature.enabled?(admin_thing)).to eq(false)
end
it 'disables actor in percentage of actors' do
enabled = (1..100).select do |i|
thing = Flipper::Actor.new(i)
feature.enabled?(thing)
end.size
expect(enabled).to be(0)
end
it 'disables percentage of time' do
expect(feature.enabled?(pitt)).to eq(false)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with a group' do
before do
feature.enable dev_group
feature.enable admin_group
@result = feature.disable(admin_group)
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'disables the feature for non flipper thing in the group' do
expect(feature.enabled?(admin_thing)).to eq(false)
end
it 'does not disable feature for non flipper thing in other groups' do
expect(feature.enabled?(dev_thing)).to eq(true)
end
it 'disables feature for flipper actor in group' do
expect(feature.enabled?(flipper.actor(admin_thing))).to eq(false)
end
it 'does not disable feature for flipper actor in other groups' do
expect(feature.enabled?(flipper.actor(dev_thing))).to eq(true)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with an actor' do
before do
feature.enable pitt
feature.enable clooney
@result = feature.disable(pitt)
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'disables feature for actor' do
expect(feature.enabled?(pitt)).to eq(false)
end
it 'does not disable feature for other actors' do
expect(feature.enabled?(clooney)).to eq(true)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with a percentage of actors' do
before do
@result = feature.disable(flipper.actors(0))
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'disables feature' do
enabled = (1..100).select do |i|
thing = Flipper::Actor.new(i)
feature.enabled?(thing)
end.size
expect(enabled).to be(0)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with a percentage of time' do
before do
@gate = feature.gate(:percentage_of_time)
@result = feature.disable(flipper.time(0))
end
it 'returns true' do
expect(@result).to eq(true)
end
it 'disables feature for time within percentage' do
allow(@gate).to receive_messages(rand: 0.04)
expect(feature.enabled?).to eq(false)
end
it 'disables feature for time not within percentage' do
allow(@gate).to receive_messages(rand: 0.10)
expect(feature.enabled?).to eq(false)
end
it 'adds feature to set of features' do
expect(flipper.features.map(&:name)).to include(:search)
end
end
context 'with argument that has no gate' do
it 'raises error' do
thing = Object.new
expect do
feature.disable(thing)
end.to raise_error(Flipper::GateNotFound, "Could not find gate for #{thing.inspect}")
end
end
end
describe '#enabled?' do
context 'with no arguments' do
it 'defaults to false' do
expect(feature.enabled?).to eq(false)
end
end
context 'with no arguments, but boolean enabled' do
before do
feature.enable
end
it 'returns true' do
expect(feature.enabled?).to eq(true)
end
end
context 'for actor in enabled group' do
before do
feature.enable admin_group
end
it 'returns true' do
expect(feature.enabled?(flipper.actor(admin_thing))).to eq(true)
expect(feature.enabled?(admin_thing)).to eq(true)
end
it 'returns true for truthy block values' do
expect(feature.enabled?(flipper.actor(admin_truthy_thing))).to eq(true)
end
end
context 'for actor in disabled group' do
it 'returns false' do
expect(feature.enabled?(flipper.actor(dev_thing))).to eq(false)
expect(feature.enabled?(dev_thing)).to eq(false)
end
it 'returns false for falsey block values' do
expect(feature.enabled?(flipper.actor(admin_falsey_thing))).to eq(false)
end
end
context 'for enabled actor' do
before do
feature.enable pitt
end
it 'returns true' do
expect(feature.enabled?(pitt)).to eq(true)
end
end
context 'for not enabled actor' do
it 'returns false' do
expect(feature.enabled?(clooney)).to eq(false)
end
it 'returns true if boolean enabled' do
feature.enable
expect(feature.enabled?(clooney)).to eq(true)
end
end
context 'for enabled percentage of time' do
before do
# ensure percentage of time returns percentage that makes five percent
# of time true
@gate = feature.gate(:percentage_of_time)
allow(@gate).to receive_messages(rand: 0.04)
feature.enable five_percent_of_time
end
it 'returns true' do
expect(feature.enabled?).to eq(true)
expect(feature.enabled?(nil)).to eq(true)
expect(feature.enabled?(pitt)).to eq(true)
expect(feature.enabled?(admin_thing)).to eq(true)
end
end
context 'for enabled float percentage of time' do
before do
# ensure percentage of time returns percentage that makes 4.1 percent
# of time true
@gate = feature.gate(:percentage_of_time)
allow(@gate).to receive_messages(rand: 0.04)
feature.enable_percentage_of_time 4.1
end
it 'returns true' do
expect(feature.enabled?).to eq(true)
expect(feature.enabled?(nil)).to eq(true)
expect(feature.enabled?(pitt)).to eq(true)
expect(feature.enabled?(admin_thing)).to eq(true)
end
end
context 'for NOT enabled integer percentage of time' do
before do
# ensure percentage of time returns percentage that makes enabled? false
@gate = feature.gate(:percentage_of_time)
allow(@gate).to receive_messages(rand: 0.10)
feature.enable five_percent_of_time
end
it 'returns false' do
expect(feature.enabled?).to eq(false)
expect(feature.enabled?(nil)).to eq(false)
expect(feature.enabled?(pitt)).to eq(false)
expect(feature.enabled?(admin_thing)).to eq(false)
end
it 'returns true if boolean enabled' do
feature.enable
expect(feature.enabled?).to eq(true)
expect(feature.enabled?(nil)).to eq(true)
expect(feature.enabled?(pitt)).to eq(true)
expect(feature.enabled?(admin_thing)).to eq(true)
end
end
context 'for NOT enabled float percentage of time' do
before do
# ensure percentage of time returns percentage that makes enabled? false
@gate = feature.gate(:percentage_of_time)
allow(@gate).to receive_messages(rand: 0.10)
feature.enable_percentage_of_time 9.9
end
it 'returns false' do
expect(feature.enabled?).to eq(false)
expect(feature.enabled?(nil)).to eq(false)
expect(feature.enabled?(pitt)).to eq(false)
expect(feature.enabled?(admin_thing)).to eq(false)
end
it 'returns true if boolean enabled' do
feature.enable
expect(feature.enabled?).to eq(true)
expect(feature.enabled?(nil)).to eq(true)
expect(feature.enabled?(pitt)).to eq(true)
expect(feature.enabled?(admin_thing)).to eq(true)
end
end
context 'for a non flipper thing' do
before do
feature.enable admin_group
end
it 'returns true if in enabled group' do
expect(feature.enabled?(admin_thing)).to eq(true)
end
it 'returns false if not in enabled group' do
expect(feature.enabled?(dev_thing)).to eq(false)
end
it 'returns true if boolean enabled' do
feature.enable
expect(feature.enabled?(admin_thing)).to eq(true)
expect(feature.enabled?(dev_thing)).to eq(true)
end
end
end
context 'enabling multiple groups, disabling everything, then enabling one group' do
before do
feature.enable(admin_group)
feature.enable(dev_group)
feature.disable
feature.enable(admin_group)
end
it 'enables feature for object in enabled group' do
expect(feature.enabled?(admin_thing)).to eq(true)
end
it 'does not enable feature for object in not enabled group' do
expect(feature.enabled?(dev_thing)).to eq(false)
end
end
end
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