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Copy pathtest_sparse_array.py
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113 lines (82 loc) · 2.58 KB
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"""
This tests the solution that does not support slicing
"""
import pytest
from sparse_array import SparseArray
def set_up():
my_array = [2, 0, 0, 0, 3, 0, 0, 0, 4, 5, 6, 0, 2, 9]
my_sparse = SparseArray(my_array)
return (my_array, my_sparse)
def test_object_exists():
my_array, my_sparse = set_up()
assert isinstance(my_sparse, SparseArray)
def test_get_non_zero_number():
my_array, my_sparse = set_up()
assert my_sparse[4] == 3
def test_get_zero():
my_array, my_sparse = set_up()
assert my_sparse[1] == 0
def test_get_element_not_in_array():
my_array, my_sparse = set_up()
with pytest.raises(IndexError):
my_sparse[14]
def test_get_length():
my_array, my_sparse = set_up()
assert len(my_sparse) == 14
def test_change_number_in_array():
my_array, my_sparse = set_up()
my_sparse[0] = 3
assert my_sparse[0] == 3
# make sure others aren't changed
assert my_sparse[1] == 0
# make sure still same length
assert len(my_sparse) == 14
def test_change_number_in_array_to_zero():
my_array, my_sparse = set_up()
my_sparse[4] = 0
assert my_sparse[4] == 0
# make sure still same length
assert len(my_sparse) == 14
def test_change_number_in_array_from_zero():
my_array, my_sparse = set_up()
my_sparse[1] = 4
assert my_sparse[1] == 4
# make sure still same length
assert len(my_sparse) == 14
def test_delete_number():
my_array, my_sparse = set_up()
del(my_sparse[4])
# if we delete the 4 position, should now be zero
assert my_sparse[4] == 0
# should have smaller length
assert len(my_sparse) == 13
def test_delete_zero():
my_array, my_sparse = set_up()
del(my_sparse[5])
# should still be zero, but should have shorter length
assert my_sparse[5] == 0
assert len(my_sparse) == 13
def test_delete_last_number():
my_array, my_sparse = set_up()
del(my_sparse[13])
# should get an error?
with pytest.raises(IndexError):
my_sparse[13]
assert len(my_sparse) == 13
def test_indices_change():
my_array, my_sparse = set_up()
del(my_sparse[3])
# next index should have changed
# my_sparse[4] was 3 now
# my_sparse[3] should be 3
assert (my_sparse[3] == 3)
# this is a way to tell pytest that you expect this test to fail
@pytest.mark.xfail
def test_get_slice():
my_array, my_sparse = set_up()
assert my_sparse[2:4] == [0, 0]
@pytest.mark.xfail
def test_set_slice():
my_array, my_sparse = set_up()
my_sparse[2:4] = [2, 3, 4]
assert my_sparse[:] == [2, 0, 2, 3, 4, 3, 0, 0, 0, 4, 5, 6, 0, 2, 9]