1 files changed, 45 insertions, 0 deletions
diff --git a/spec/lib/gitlab/kubernetes/kubeconfig/template_spec.rb b/spec/lib/gitlab/kubernetes/kubeconfig/template_spec.rb
index 057c4373329..7d1f1aea291 100644
--- a/spec/lib/gitlab/kubernetes/kubeconfig/template_spec.rb
+++ b/spec/lib/gitlab/kubernetes/kubeconfig/template_spec.rb
@@ -39,6 +39,51 @@ RSpec.describe Gitlab::Kubernetes::Kubeconfig::Template do
     it { is_expected.to eq(YAML.dump(template.to_h.deep_stringify_keys)) }
   end
 
+  describe '#merge_yaml' do
+    it 'appends to the configuration and overwrites the current context' do
+      template.add_cluster(name: 'hello-cluster', url: 'hello-url')
+      template.add_context(name: 'hello-context', cluster: 'hello-cluster', user: 'hello-user')
+      template.add_user(name: 'hello-user', token: 'hello-token')
+      ca_pem = Base64.strict_encode64('a certificate')
+      template.merge_yaml(<<~YAML)
+        apiVersion: v1
+        kind: Config
+        clusters:
+          - name: 'gitlab-deploy'
+            cluster:
+              server: url
+              certificate-authority-data: #{ca_pem.inspect}
+        contexts:
+          - name: gitlab-deploy
+            context:
+              cluster: gitlab-deploy
+              namespace: namespace
+              user: gitlab-deploy
+        current-context: gitlab-deploy
+        users:
+          - name: 'gitlab-deploy'
+            user: { token: token }
+      YAML
+      expect(template.to_h).to eq({
+        apiVersion: 'v1',
+        kind: 'Config',
+        clusters: [
+          { name: 'hello-cluster', cluster: { server: 'hello-url' } },
+          { name: 'gitlab-deploy', cluster: { server: 'url', 'certificate-authority-data': ca_pem } }
+        ],
+        contexts: [
+          { name: 'hello-context', context: { cluster: 'hello-cluster', user: 'hello-user' } },
+          { name: 'gitlab-deploy', context: { cluster: 'gitlab-deploy', namespace: 'namespace', user: 'gitlab-deploy' } }
+        ],
+        users: [
+          { name: 'hello-user', user: { token: 'hello-token' } },
+          { name: 'gitlab-deploy', user: { token: 'token' } }
+        ],
+        'current-context': 'gitlab-deploy'
+      })
+    end
+  end
+
   describe 'adding entries' do
     let(:entry) { instance_double(entry_class, to_h: attributes) }
     let(:attributes) do