text: 
  import tempfile
  
  import numpy as np
  import pytest
  
  from sunpy.io import ana
  from sunpy.tests.helpers import skip_ana
  
  # Create a test image, store it, reread it and compare
  img_size = (456, 345)
  img_src = np.arange(np.product(img_size))
  img_src.shape = img_size
  img_i8 = img_src*2**8/img_src.max()
  img_i8 = img_i8.astype(np.int8)
  img_i16 = img_src*2**16/img_src.max()
  img_i16 = img_i16.astype(np.int16)
  img_f32 = img_src*1.0/img_src.max()
  img_f32 = img_f32.astype(np.float32)
  
  
  @skip_ana
  def test_i8c():
      # Test int 8 compressed functions
      afilename = tempfile.NamedTemporaryFile().name
      ana.write(afilename, img_i8, 'testcase', 0)
      img_i8c_rec = ana.read(afilename)
      assert np.sum(img_i8c_rec[0][0] - img_i8) == 0
  
  
  @skip_ana
  def test_i8u():
      # Test int 8 uncompressed functions
      afilename = tempfile.NamedTemporaryFile().name
      ana.write(afilename, img_i8, 'testcase', 1)
      img_i8u_rec = ana.read(afilename)
      assert np.sum(img_i8u_rec[0][0] - img_i8) == 0
  
  
  @skip_ana
  def test_i16c():
      # Test int 16 compressed functions
      afilename = tempfile.NamedTemporaryFile().name
      ana.write(afilename, img_i16, 'testcase', 1)
      img_i16c_rec = ana.read(afilename)
      assert np.sum(img_i16c_rec[0][0] - img_i16) == 0
  
  
  @skip_ana
  def test_i16u():
      # Test int 16 uncompressed functions
      afilename = tempfile.NamedTemporaryFile().name
      ana.write(afilename, img_i16, 'testcase', 0)
      img_i16u_rec = ana.read(afilename)
      assert np.sum(img_i16u_rec[0][0] - img_i16) == 0
  
  
  @skip_ana
  def test_f32u():
      # Test float 32 uncompressed functions
      afilename = tempfile.NamedTemporaryFile().name
      ana.write(afilename, img_f32, 'testcase', 0)
      img_f32u_rec = ana.read(afilename)
      assert np.sum(img_f32u_rec[0][0] - img_f32) == 0
  
  
  @skip_ana
  def test_f32c():
      # TODO: Bug with same code. Needs to be tracked down.
      #Test if float 32 compressed functions
      #ana.write('/tmp/pyana-testf32c', img_f32, 1, 'testcase', 0)
      #img_f32c_rec = ana.read('/tmp/pyana-testf32c', 1)
      #assert_(np.sum(img_f32c_rec[0][1]- img_f32) == 0,
      #        msg="Storing 32 bits float data without compression failed (diff: %g)" % (1.0*np.sum(img_f32c_rec[0][1] - img_f32)))
      afilename = tempfile.NamedTemporaryFile().name
      with pytest.raises(RuntimeError):
          ana.write(afilename, img_f32, 'testcase', 1)
  