Fix helm ignoring given context (#387)

Fixes: #385

molecule/default/roles/helm/tasks/tests_chart.yml

@@ -348,6 +348,24 @@
         that:
           result.stat.exists
 
+    - name: Release using non-existent context
+      helm:
+        binary_path: "{{ helm_binary }}"
+        name: test
+        chart_ref: "{{ chart_source }}"
+        chart_version: "{{ chart_source_version | default(omit) }}"
+        namespace: "{{ helm_namespace }}"
+        create_namespace: true
+        context: does-not-exist
+      ignore_errors: yes
+      register: result
+
+    - name: Assert that release fails with non-existent context
+      assert:
+        that:
+          - result is failed
+          - "'context \"does-not-exist\" does not exist' in result.stderr"
+
   always:
     - name: Clean up temp dir
       file: