Add RoleBinding methods

Includes RoleBinding methods to Kubeclient and introduce a new lib class
to generate RoleBinding resources.

This MR is part of
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22011

1 files changed, 47 insertions, 0 deletions

diff --git a/spec/lib/gitlab/kubernetes/role_binding_spec.rb b/spec/lib/gitlab/kubernetes/role_binding_spec.rb
new file mode 100644
index 00000000000..da3f5d27b25
--- /dev/null
+++ b/spec/lib/gitlab/kubernetes/role_binding_spec.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Kubernetes::RoleBinding, '#generate' do
+  let(:role_name) { 'edit' }
+  let(:namespace) { 'my-namespace' }
+  let(:service_account_name) { 'my-service-account' }
+
+  let(:subjects) do
+    [
+      {
+        kind: 'ServiceAccount',
+        name: service_account_name,
+        namespace: namespace
+      }
+    ]
+  end
+
+  let(:role_ref) do
+    {
+      apiGroup: 'rbac.authorization.k8s.io',
+      kind: 'Role',
+      name: role_name
+    }
+  end
+
+  let(:resource) do
+    ::Kubeclient::Resource.new(
+      metadata: { name: "gitlab-#{namespace}", namespace: namespace },
+      roleRef: role_ref,
+      subjects: subjects
+    )
+  end
+
+  subject do
+    described_class.new(
+      role_name: role_name,
+      namespace: namespace,
+      service_account_name: service_account_name
+    ).generate
+  end
+
+  it 'should build a Kubeclient Resource' do
+    is_expected.to eq(resource)
+  end
+end