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|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Feature::Definition do
let(:attributes) do
{ name: 'feature_flag',
type: 'development',
default_enabled: true }
end
let(:path) { File.join('development', 'feature_flag.yml') }
let(:definition) { described_class.new(path, attributes) }
let(:yaml_content) { attributes.deep_stringify_keys.to_yaml }
describe '#key' do
subject { definition.key }
it 'returns a symbol from name' do
is_expected.to eq(:feature_flag)
end
end
describe '#validate!' do
using RSpec::Parameterized::TableSyntax
where(:param, :value, :result) do
:name | nil | /Feature flag is missing name/
:path | nil | /Feature flag 'feature_flag' is missing path/
:type | nil | /Feature flag 'feature_flag' is missing type/
:type | 'invalid' | /Feature flag 'feature_flag' type 'invalid' is invalid/
:path | 'development/invalid.yml' | /Feature flag 'feature_flag' has an invalid path/
:path | 'invalid/feature_flag.yml' | /Feature flag 'feature_flag' has an invalid type/
:default_enabled | nil | /Feature flag 'feature_flag' is missing default_enabled/
end
with_them do
let(:params) { attributes.merge(path: path) }
before do
params[param] = value
end
it do
expect do
described_class.new(
params[:path], params.except(:path)
).validate!
end.to raise_error(result)
end
end
end
describe '#valid_usage!' do
context 'validates type' do
it 'raises exception for invalid type' do
expect { definition.valid_usage!(type_in_code: :invalid, default_enabled_in_code: false) }
.to raise_error(/The `type:` of `feature_flag` is not equal to config/)
end
end
context 'validates default enabled' do
it 'raises exception for different value' do
expect { definition.valid_usage!(type_in_code: :development, default_enabled_in_code: false) }
.to raise_error(/The `default_enabled:` of `feature_flag` is not equal to config/)
end
end
end
describe '.paths' do
it 'returns at least one path' do
expect(described_class.paths).not_to be_empty
end
end
describe '.load_from_file' do
it 'properly loads a definition from file' do
expect(File).to receive(:read).with(path) { yaml_content }
expect(described_class.send(:load_from_file, path).attributes)
.to eq(definition.attributes)
end
context 'for missing file' do
let(:path) { 'missing/feature-flag/file.yml' }
it 'raises exception' do
expect do
described_class.send(:load_from_file, path)
end.to raise_error(/Invalid definition for/)
end
end
context 'for invalid definition' do
it 'raises exception' do
expect(File).to receive(:read).with(path) { '{}' }
expect do
described_class.send(:load_from_file, path)
end.to raise_error(/Feature flag is missing name/)
end
end
end
describe '.load_all!' do
let(:store1) { Dir.mktmpdir('path1') }
let(:store2) { Dir.mktmpdir('path2') }
before do
allow(described_class).to receive(:paths).and_return(
[
File.join(store1, '**', '*.yml'),
File.join(store2, '**', '*.yml')
]
)
end
it "when there's no feature flags a list of definitions is empty" do
expect(described_class.load_all!).to be_empty
end
it "when there's a single feature flag it properly loads them" do
write_feature_flag(store1, path, yaml_content)
expect(described_class.load_all!).to be_one
end
it "when the same feature flag is stored multiple times raises exception" do
write_feature_flag(store1, path, yaml_content)
write_feature_flag(store2, path, yaml_content)
expect { described_class.load_all! }
.to raise_error(/Feature flag 'feature_flag' is already defined/)
end
it "when one of the YAMLs is invalid it does raise exception" do
write_feature_flag(store1, path, '{}')
expect { described_class.load_all! }
.to raise_error(/Feature flag is missing name/)
end
after do
FileUtils.rm_rf(store1)
FileUtils.rm_rf(store2)
end
def write_feature_flag(store, path, content)
path = File.join(store, path)
dir = File.dirname(path)
FileUtils.mkdir_p(dir)
File.write(path, content)
end
end
describe '.valid_usage!' do
before do
allow(described_class).to receive(:definitions) do
{ definition.key => definition }
end
end
context 'when a known feature flag is used' do
it 'validates it usage' do
expect(definition).to receive(:valid_usage!)
described_class.valid_usage!(:feature_flag, type: :development, default_enabled: false)
end
end
context 'when an unknown feature flag is used' do
context 'for a type that is required to have all feature flags registered' do
before do
stub_const('Feature::Shared::TYPES', {
development: { optional: false }
})
end
it 'raises exception' do
expect do
described_class.valid_usage!(:unknown_feature_flag, type: :development, default_enabled: false)
end.to raise_error(/Missing feature definition for `unknown_feature_flag`/)
end
end
context 'for a type that is optional' do
before do
stub_const('Feature::Shared::TYPES', {
development: { optional: true }
})
end
it 'does not raise exception' do
expect do
described_class.valid_usage!(:unknown_feature_flag, type: :development, default_enabled: false)
end.not_to raise_error
end
end
context 'for an unknown type' do
it 'raises exception' do
expect do
described_class.valid_usage!(:unknown_feature_flag, type: :unknown_type, default_enabled: false)
end.to raise_error(/Unknown feature flag type used: `unknown_type`/)
end
end
end
end
end
|
