testbed/astropy__astropy/astropy/table/tests/test_array.py

# Licensed under a 3-clause BSD style license - see LICENSE.rst

import pytest
import numpy as np

from astropy.table.sorted_array import SortedArray
from astropy.table.table import Table


@pytest.fixture
def array():
    # composite index
    col0 = np.array([x % 2 for x in range(1, 11)])
    col1 = np.array([x for x in range(1, 11)])
    t = Table([col0, col1])
    t = t[t.argsort()]
    return SortedArray(t, t['col1'].copy())


@pytest.fixture
def wide_array():
    # array with 100 columns
    t = Table([[x] * 10 for x in np.arange(100)])
    return SortedArray(t, t['col0'].copy())


def test_array_find(array):
    for i in range(1, 11):
        print("Searching for {0}".format(i))
        assert array.find((i % 2, i)) == [i]
    assert array.find((1, 4)) == []


def test_array_range(array):
    assert np.all(array.range((0, 8), (1, 3), (True, True)) == [8, 10, 1, 3])
    assert np.all(array.range((0, 8), (1, 3), (False, True)) == [10, 1, 3])
    assert np.all(array.range((0, 8), (1, 3), (True, False)) == [8, 10, 1])


def test_wide_array(wide_array):
    # checks for a previous bug in which the length of a
    # sliced SortedArray was set to the number of columns
    # instead of the number of elements in each column
    first_row = wide_array[:1].data
    assert np.all(first_row == Table([[x] for x in np.arange(100)]))