debian-mirror-gitlab/spec/lib/gitlab/kubernetes/kube_client_spec.rb

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2018-11-20 20:47:30 +05:30
# frozen_string_literal: true
require 'spec_helper'
describe Gitlab::Kubernetes::KubeClient do
include KubernetesHelpers
let(:api_url) { 'https://kubernetes.example.com/prefix' }
let(:api_groups) { ['api', 'apis/rbac.authorization.k8s.io'] }
let(:api_version) { 'v1' }
let(:kubeclient_options) { { auth_options: { bearer_token: 'xyz' } } }
let(:client) { described_class.new(api_url, api_groups, api_version, kubeclient_options) }
before do
stub_kubeclient_discover(api_url)
end
describe '#hashed_clients' do
subject { client.hashed_clients }
it 'has keys from api groups' do
expect(subject.keys).to match_array api_groups
end
it 'has values of Kubeclient::Client' do
expect(subject.values).to all(be_an_instance_of Kubeclient::Client)
end
end
describe '#clients' do
subject { client.clients }
it 'is not empty' do
is_expected.to be_present
end
it 'is an array of Kubeclient::Client objects' do
is_expected.to all(be_an_instance_of Kubeclient::Client)
end
it 'has each API group url' do
expected_urls = api_groups.map { |group| "#{api_url}/#{group}" }
expect(subject.map(&:api_endpoint).map(&:to_s)).to match_array(expected_urls)
end
it 'has the kubeclient options' do
subject.each do |client|
expect(client.auth_options).to eq({ bearer_token: 'xyz' })
end
end
it 'has the api_version' do
subject.each do |client|
expect(client.instance_variable_get(:@api_version)).to eq('v1')
end
end
end
describe '#core_client' do
subject { client.core_client }
it 'is a Kubeclient::Client' do
is_expected.to be_an_instance_of Kubeclient::Client
end
it 'has the core API endpoint' do
expect(subject.api_endpoint.to_s).to match(%r{\/api\Z})
end
end
describe '#rbac_client' do
subject { client.rbac_client }
it 'is a Kubeclient::Client' do
is_expected.to be_an_instance_of Kubeclient::Client
end
it 'has the RBAC API group endpoint' do
expect(subject.api_endpoint.to_s).to match(%r{\/apis\/rbac.authorization.k8s.io\Z})
end
end
describe '#extensions_client' do
subject { client.extensions_client }
let(:api_groups) { ['apis/extensions'] }
it 'is a Kubeclient::Client' do
is_expected.to be_an_instance_of Kubeclient::Client
end
it 'has the extensions API group endpoint' do
expect(subject.api_endpoint.to_s).to match(%r{\/apis\/extensions\Z})
end
end
describe '#discover!' do
it 'makes a discovery request for each API group' do
client.discover!
api_groups.each do |api_group|
discovery_url = api_url + '/' + api_group + '/v1'
expect(WebMock).to have_requested(:get, discovery_url).once
end
end
end
describe 'core API' do
let(:core_client) { client.core_client }
[
:get_pods,
:get_secrets,
:get_config_map,
:get_pod,
:get_namespace,
:get_service,
:get_service_account,
:delete_pod,
:create_config_map,
:create_namespace,
:create_pod,
:create_service_account,
:update_config_map,
:update_service_account
].each do |method|
describe "##{method}" do
it 'delegates to the core client' do
expect(client).to delegate_method(method).to(:core_client)
end
it 'responds to the method' do
expect(client).to respond_to method
end
end
end
end
describe 'rbac API group' do
let(:rbac_client) { client.rbac_client }
[
:create_cluster_role_binding,
:get_cluster_role_binding,
:update_cluster_role_binding
].each do |method|
describe "##{method}" do
it 'delegates to the rbac client' do
expect(client).to delegate_method(method).to(:rbac_client)
end
it 'responds to the method' do
expect(client).to respond_to method
end
context 'no rbac client' do
let(:api_groups) { ['api'] }
it 'throws an error' do
expect { client.public_send(method) }.to raise_error(Module::DelegationError)
end
end
end
end
end
describe 'extensions API group' do
let(:api_groups) { ['apis/extensions'] }
let(:api_version) { 'v1beta1' }
let(:extensions_client) { client.extensions_client }
describe '#get_deployments' do
it 'delegates to the extensions client' do
expect(client).to delegate_method(:get_deployments).to(:extensions_client)
end
it 'responds to the method' do
expect(client).to respond_to :get_deployments
end
context 'no extensions client' do
let(:api_groups) { ['api'] }
let(:api_version) { 'v1' }
it 'throws an error' do
expect { client.get_deployments }.to raise_error(Module::DelegationError)
end
end
end
end
describe 'non-entity methods' do
it 'does not proxy for non-entity methods' do
expect(client.clients.first).to respond_to :proxy_url
expect(client).not_to respond_to :proxy_url
end
it 'throws an error' do
expect { client.proxy_url }.to raise_error(NoMethodError)
end
end
describe '#get_pod_log' do
let(:core_client) { client.core_client }
it 'is delegated to the core client' do
expect(client).to delegate_method(:get_pod_log).to(:core_client)
end
context 'when no core client' do
let(:api_groups) { ['apis/extensions'] }
it 'throws an error' do
expect { client.get_pod_log('pod-name') }.to raise_error(Module::DelegationError)
end
end
end
describe '#watch_pod_log' do
let(:core_client) { client.core_client }
it 'is delegated to the core client' do
expect(client).to delegate_method(:watch_pod_log).to(:core_client)
end
context 'when no core client' do
let(:api_groups) { ['apis/extensions'] }
it 'throws an error' do
expect { client.watch_pod_log('pod-name') }.to raise_error(Module::DelegationError)
end
end
end
describe 'methods that do not exist on any client' do
it 'throws an error' do
expect { client.non_existent_method }.to raise_error(NoMethodError)
end
it 'returns false for respond_to' do
expect(client.respond_to?(:non_existent_method)).to be_falsey
end
end
end