text: import time
  
  import numpy as np
  
  import oscope.base
  import oscope.encoding as array_encoding
  import oscope.schema_tests
  
  
  def test_to_from_bytes():
      a1 = np.arange(107)
      b1 = array_encoding.ndarray_to_bytes(a1)
  
      a2 = array_encoding.bytes_to_ndarray(b1)
      np.testing.assert_array_equal(a1, a2)
  
  
  def test_to_from_bytes_idempotence():
      a1 = np.arange(107)
      b1 = array_encoding.ndarray_to_bytes(a1)
      time.sleep(0.1)
      b2 = array_encoding.ndarray_to_bytes(a1)
  
      assert b1 == b2, "Idempotence check failed :("
  
  
  def test_package_trace_data():
      packaged = oscope.encoding.package_trace_data(
              oscope.schema_tests.VALID_METADATA,
              oscope.schema_tests.VALID_DATA)
  
      for element in packaged:
          oscope.base.assert_isinstance(element, bytes)
  
  
  def test_unpackage_trace_data():
      packaged = oscope.encoding.package_trace_data(
              oscope.schema_tests.VALID_METADATA,
              oscope.schema_tests.VALID_DATA)
      oscope.encoding.unpackage_trace_data(packaged)
  