def test_sparse_storage():
# Simple tests for SparseEntryStorage.
bucket = SparseEntryStorage()
# Getting labels and matrix from an empty storage bucket does not crash
matrix, labels = bucket.get_matrix_and_labels()
eq_(len(labels), 0)
eq_(matrix.shape, (0, 0))
# Actually add some things and check again
bucket.add_entries(ENTRIES)
matrix, labels = bucket.get_matrix_and_labels()
eq_(' '.join(labels), 'apple red green celery orange banana yellow lemon')
eq_(matrix[0, 1], 4)
eq_(matrix[6, 5], 1)
eq_(matrix[4, 2], 0)
