code: def step_all(self):
      # TODO we could call self.tag() in some steps, once it is implemented
      from metaflow import get_namespace
      import os
  
      user = "user:%s" % os.environ.get("METAFLOW_USER")
      assert_equals(user, get_namespace())
  
imports: from metaflow_test import MetaflowTest, ExpectationFailed, steps
label_desc: Use image node_id 1 for calling the BasicTagTest obj's underlying member method code with example usage: obj.step_all() without return types