old_contents: import inspect
  import posixpath
  
  from utils import *
  import numpy as np
  import numpy.testing as npt
  import pickle
  
  
  def test_bytes(hdfs):
      testname = inspect.stack()[0][3]
      fname = posixpath.join(TEST_DIR, testname)
  
      data = b'a' * 10 * 2**20
      data += b'b' * 10 * 2**20
      data += b'c' * 10 * 2**20
  
      with hdfs.open(fname, 'w', replication=1) as f:
          f.write(data)
  
      with hdfs.open(fname, 'r') as f:
          read = f.read(len(data))
          assert len(data) == len(read)
          assert read == data
  
  
  def test_pickle(hdfs):
      testname = inspect.stack()[0][3]
      fname = posixpath.join(TEST_DIR, testname)
  
      arr = np.random.normal(10, 2, size=(100, 100))
      data = pickle.dumps(arr)
  
      with hdfs.open(fname, 'w') as f:
          f.write(data)
  
      with hdfs.open(fname, 'r') as f:
          read = f.read(len(data))
          assert len(data) == len(read)
          assert data == read
          read = pickle.loads(read)
          npt.assert_equal(arr, read)
  
  
  def test_read_nonexisten(hdfs):
      with pytest.raises(IOError):
          f = hdfs.open('/tmp/NOFILE', 'r')
  
  
  def test_open_write_read(hdfs):
      testname = inspect.stack()[0][3]
      fname = posixpath.join(TEST_DIR, testname)
  
      f = hdfs.open(fname, 'w')
      with pytest.raises(IOError):
          f.read()
      f.close()
  
  
  def test_open_read_write(hdfs):
      testname = inspect.stack()[0][3]
      fname = posixpath.join(TEST_DIR, testname)
  
      data = b'a' * 10 * 2**20
      with hdfs.open(fname, 'w') as f:
          f.write(data)
  
  
      f = hdfs.open(fname, 'r')
      with pytest.raises(IOError):
          f.write(data)
      f.close()
  
new_contents: import inspect
  import posixpath
  
  from utils import *
  import numpy as np
  import numpy.testing as npt
  import pickle
  
  
  def test_bytes(hdfs):
      testname = inspect.stack()[0][3]
      fname = posixpath.join(TEST_DIR, testname)
  
      data = b'a' * 10 * 2**20
      data += b'b' * 10 * 2**20
      data += b'c' * 10 * 2**20
  
      with hdfs.open(fname, 'w', replication=1) as f:
          f.write(data)
  
      with hdfs.open(fname, 'r') as f:
          read = f.read(len(data))
          assert len(data) == len(read)
          assert read == data
  
  
  def test_pickle(hdfs):
      testname = inspect.stack()[0][3]
      fname = posixpath.join(TEST_DIR, testname)
  
      arr = np.random.normal(10, 2, size=(100, 100))
      data = pickle.dumps(arr)
  
      with hdfs.open(fname, 'w') as f:
          f.write(data)
  
      with hdfs.open(fname, 'r') as f:
          read = f.read(len(data))
          assert len(data) == len(read)
          assert data == read
          read = pickle.loads(read)
          npt.assert_equal(arr, read)
  
  
  def test_read_nonexisten(hdfs):
      with pytest.raises(IOError):
          f = hdfs.open('/tmp/NOFILE', 'r')
  
  
  def test_open_for_write_read(hdfs):
      testname = inspect.stack()[0][3]
      fname = posixpath.join(TEST_DIR, testname)
  
      f = hdfs.open(fname, 'w')
      with pytest.raises(IOError):
          f.read()
      f.close()
  
  
  def test_open_for_read_write(hdfs):
      testname = inspect.stack()[0][3]
      fname = posixpath.join(TEST_DIR, testname)
  
      data = b'a' * 10 * 2**20
      with hdfs.open(fname, 'w') as f:
          f.write(data)
  
  
      f = hdfs.open(fname, 'r')
      with pytest.raises(IOError):
          f.write(data)
      f.close()
  
subject: Rename some tests