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# Make sure that session files can be read in a backward-compatible manner
from __future__ import absolute_import, division, print_function
import os
import numpy as np
from glue.tests.helpers import requires_astropy, requires_h5py, requires_qt
from glue.core.state import GlueUnSerializer
DATA = os.path.join(os.path.dirname(__file__), 'data')
@requires_qt
@requires_astropy
def test_load_simple_tables_04():
# This loads a session file made with Glue v0.4. In this session, we have
# loaded four tables. The first two are from the same file, but one loaded
# via the auto loader and the other via the Astropy FITS table loader. The
# second two were loaded similarly to the first two, but the file contains
# two HDUs this time. However, in Glue v0.4, only the first HDU was read so
# we shouldn't have access to columns c and d in ``double_tables.fits``.
with open(os.path.join(DATA, 'simple_tables.glu'), 'r') as f:
template = f.read()
content = template.replace('{DATA_PATH}', (DATA + os.sep).replace('\\', '\\\\'))
state = GlueUnSerializer.loads(content)
ga = state.object('__main__')
dc = ga.session.data_collection
# All tables should actually be the same because the FITS reader back at
# 0.4 only read in the first HDU so the new reader is back-compatible
# since it preserves HDU order.
assert len(dc) == 4
assert dc[0].label == 'single_table_auto'
assert dc[1].label == 'single_table'
assert dc[2].label == 'double_tables_auto'
assert dc[3].label == 'double_tables'
np.testing.assert_equal(dc[0]['a'], [1, 2, 3])
np.testing.assert_equal(dc[0]['b'], [4, 5, 6])
np.testing.assert_equal(dc[0]['a'], dc[1]['a'])
np.testing.assert_equal(dc[0]['b'], dc[1]['b'])
np.testing.assert_equal(dc[0]['a'], dc[2]['a'])
np.testing.assert_equal(dc[0]['b'], dc[2]['b'])
np.testing.assert_equal(dc[0]['a'], dc[3]['a'])
np.testing.assert_equal(dc[0]['b'], dc[3]['b'])
ga.close()
@requires_qt
@requires_h5py
def test_load_hdf5_grids_04():
# This loads a session file made with Glue v0.4. In this session, we have
# loaded two gridded datasets from an HDF5 datafile: the first one loaded
# via the auto loader and the other via the FITS/HDF5 loader.
with open(os.path.join(DATA, 'simple_hdf5_grid.glu'), 'r') as f:
template = f.read()
content = template.replace('{DATA_PATH}', (DATA + os.sep).replace('\\', '\\\\'))
state = GlueUnSerializer.loads(content)
ga = state.object('__main__')
dc = ga.session.data_collection
assert len(dc) == 2
assert dc[0].label == 'single_grid_auto'
assert dc[1].label == 'single_grid'
np.testing.assert_equal(dc[0]['/array1'], 1)
np.testing.assert_equal(dc[0]['/array1'].shape, (2, 3, 4))
ga.close()
@requires_qt
@requires_astropy
def test_load_link_helpers_04():
# This loads a session file made with Glue v0.4. In this session, we have
# two tables, and we use all the celestial link functions that were present
# in Glue v0.4. We now check that the paths are patched when loading the
# session (since the functions have been moved to a deprecated location)
with open(os.path.join(DATA, 'session_links.glu'), 'r') as f:
content = f.read()
state = GlueUnSerializer.loads(content)
ga = state.object('__main__')
@requires_qt
@requires_astropy
def test_load_viewers_04():
# This loads a session file made with Glue v0.4. In this session, we have
# three viewers: one scatter viewer, one image viewer, and one histogram
# viewer.
with open(os.path.join(DATA, 'simple_viewers.glu'), 'r') as f:
content = f.read()
state = GlueUnSerializer.loads(content)
ga = state.object('__main__')
assert len(ga.viewers[0]) == 3
labels = sorted([x.LABEL for x in ga.viewers[0]])
assert labels == ['Histogram', 'Image Viewer', 'Scatter Plot']
viewers = {}
for x in ga.viewers[0]:
viewers[x.LABEL] = x
h = viewers['Histogram']
assert h.viewer_size == (1235, 531)
assert h.position == (0, 535)
assert h.component.label == 'b'
i = viewers['Image Viewer']
assert i.viewer_size == (562, 513)
assert i.position == (672, 0)
assert i.attribute.label == "image"
s = viewers['Scatter Plot']
assert s.viewer_size == (670, 512)
assert s.position == (0, 0)
assert s.xatt.label == 'b'
assert s.yatt.label == 'a'
assert s.xlog
assert not s.ylog
assert not s.xflip
assert s.yflip
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