code: def testGetMemoryInfoUnknownDevice(self):
      with self.assertRaisesRegex(
          ValueError, "No matching devices found"
      ):
          context.context().get_memory_info("unknown_device:0")
  
imports: import weakref
  from absl.testing import parameterized
  import numpy
  from xla.service import hlo_pb2
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 8 for calling the ContextTest obj's underlying member method code with example usage: obj.testGetMemoryInfoUnknownDevice() without return types