119 lines
3.9 KiB
Python
119 lines
3.9 KiB
Python
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import numpy as np
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import h5py
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from .common import ut, TestCase
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class TestDatasetSwmrRead(TestCase):
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""" Testing SWMR functions when reading a dataset.
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Skip this test if the HDF5 library does not have the SWMR features.
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"""
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def setUp(self):
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TestCase.setUp(self)
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self.data = np.arange(13).astype('f')
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self.dset = self.f.create_dataset('data', chunks=(13,), maxshape=(None,), data=self.data)
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fname = self.f.filename
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self.f.close()
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self.f = h5py.File(fname, 'r', swmr=True)
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self.dset = self.f['data']
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def test_initial_swmr_mode_on(self):
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""" Verify that the file is initially in SWMR mode"""
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self.assertTrue(self.f.swmr_mode)
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def test_read_data(self):
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self.assertArrayEqual(self.dset, self.data)
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def test_refresh(self):
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self.dset.refresh()
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def test_force_swmr_mode_on_raises(self):
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""" Verify when reading a file cannot be forcibly switched to swmr mode.
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When reading with SWMR the file must be opened with swmr=True."""
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with self.assertRaises(Exception):
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self.f.swmr_mode = True
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self.assertTrue(self.f.swmr_mode)
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def test_force_swmr_mode_off_raises(self):
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""" Switching SWMR write mode off is only possible by closing the file.
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Attempts to forcibly switch off the SWMR mode should raise a ValueError.
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"""
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with self.assertRaises(ValueError):
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self.f.swmr_mode = False
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self.assertTrue(self.f.swmr_mode)
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class TestDatasetSwmrWrite(TestCase):
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""" Testing SWMR functions when reading a dataset.
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Skip this test if the HDF5 library does not have the SWMR features.
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"""
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def setUp(self):
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""" First setup a file with a small chunked and empty dataset.
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No data written yet.
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"""
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# Note that when creating the file, the swmr=True is not required for
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# write, but libver='latest' is required.
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self.f = h5py.File(self.mktemp(), 'w', libver='latest')
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self.data = np.arange(4).astype('f')
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self.dset = self.f.create_dataset('data', shape=(0,), dtype=self.data.dtype, chunks=(2,), maxshape=(None,))
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def test_initial_swmr_mode_off(self):
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""" Verify that the file is not initially in SWMR mode"""
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self.assertFalse(self.f.swmr_mode)
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def test_switch_swmr_mode_on(self):
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""" Switch to SWMR mode and verify """
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self.f.swmr_mode = True
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self.assertTrue(self.f.swmr_mode)
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def test_switch_swmr_mode_off_raises(self):
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""" Switching SWMR write mode off is only possible by closing the file.
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Attempts to forcibly switch off the SWMR mode should raise a ValueError.
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"""
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self.f.swmr_mode = True
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self.assertTrue(self.f.swmr_mode)
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with self.assertRaises(ValueError):
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self.f.swmr_mode = False
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self.assertTrue(self.f.swmr_mode)
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def test_extend_dset(self):
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""" Extend and flush a SWMR dataset
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"""
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self.f.swmr_mode = True
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self.assertTrue(self.f.swmr_mode)
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self.dset.resize( self.data.shape )
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self.dset[:] = self.data
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self.dset.flush()
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# Refresh and read back data for assertion
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self.dset.refresh()
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self.assertArrayEqual(self.dset, self.data)
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def test_extend_dset_multiple(self):
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self.f.swmr_mode = True
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self.assertTrue(self.f.swmr_mode)
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self.dset.resize( (4,) )
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self.dset[0:] = self.data
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self.dset.flush()
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# Refresh and read back 1st data block for assertion
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self.dset.refresh()
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self.assertArrayEqual(self.dset, self.data)
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self.dset.resize( (8,) )
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self.dset[4:] = self.data
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self.dset.flush()
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# Refresh and read back 1st data block for assertion
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self.dset.refresh()
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self.assertArrayEqual(self.dset[0:4], self.data)
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self.assertArrayEqual(self.dset[4:8], self.data)
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