Method setUp

tables/tests/test_tree.py:691–728

(self)

    """Checks for deep hierarchy levels in PyTables trees."""

    def setUp(self):
        super().setUp()

        # Here we put a more conservative limit to deal with more platforms
        # With maxdepth = 64 this test would take less than 40 MB
        # of main memory to run, which is quite reasonable nowadays.
        # With maxdepth = 1024 this test will take around 300 MB.
        if common.heavy:
            self.maxdepth = 256  # Takes around 60 MB of memory!
        else:
            self.maxdepth = 64  # This should be safe for most machines
        if common.verbose:
            print("Maximum depth tested :", self.maxdepth)

        # Open a new empty HDF5 file
        group = self.h5file.root
        if common.verbose:
            print("Depth writing progress: ", end=" ")

        # Iterate until maxdepth
        for depth in range(self.maxdepth):
            # Save it on the HDF5 file
            if common.verbose:
                print("%3d," % (depth), end=" ")
            # Create a couple of arrays here
            self.h5file.create_array(
                group, "array", [1, 1], "depth: %d" % depth
            )
            self.h5file.create_array(
                group, "array2", [1, 1], "depth: %d" % depth
            )
            # And also a group
            self.h5file.create_group(group, "group2_" + str(depth))
            # Finally, iterate over a new group
            group = self.h5file.create_group(group, "group" + str(depth))

        # Close the file
        self.h5file.close()

    def _check_tree(self, filename):
        # Open the previous HDF5 file in read-only mode