def setupClass(cls):
        grun_data = grunfeld.load_pandas().data
        index_data = grun_data.set_index(['firm'])
        index_group = index_data.index
        cls.grouping = Grouping(index_group)
        cls.data = index_data

        cls.expected_counts = [20] * 11
    def setupClass(cls):
        grun_data = grunfeld.load_pandas().data
        multi_index_data = grun_data.set_index(['firm', 'year'])
        multi_index_panel = multi_index_data.index
        cls.grouping = Grouping(multi_index_panel)
        cls.data = multi_index_data

        cls.expected_counts = [20] * 11
def test_init_api():
    # make a multi-index panel
    grun_data = grunfeld.load_pandas().data
    multi_index_panel = grun_data.set_index(['firm', 'year']).index
    grouping = Grouping(multi_index_panel)
    # check group_names
    np.testing.assert_array_equal(grouping.group_names, ['firm', 'year'])
    # check shape
    np.testing.assert_array_equal(grouping.index_shape, (11, 20))
    # check index_int
    np.testing.assert_array_equal(grouping.labels, [[
        5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 8, 8, 8, 8,
        8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4,
        4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
        2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
        1, 1, 1, 1, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
        9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10,
        10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6,
        6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3,
        3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
    ],
                                                    [
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19,
                                                        0, 1, 2, 3, 4, 5, 6, 7,
                                                        8, 9, 10, 11, 12, 13,
                                                        14, 15, 16, 17, 18, 19
                                                    ]])
    grouping = Grouping(multi_index_panel, names=['firms', 'year'])
    np.testing.assert_array_equal(grouping.group_names, ['firms', 'year'])

    # make a multi-index grouping
    anes_data = anes96.load_pandas().data
    multi_index_groups = anes_data.set_index(['educ', 'income',
                                              'TVnews']).index
    grouping = Grouping(multi_index_groups)
    np.testing.assert_array_equal(grouping.group_names,
                                  ['educ', 'income', 'TVnews'])
    np.testing.assert_array_equal(grouping.index_shape, (7, 24, 8))

    # make a list multi-index panel
    list_panel = multi_index_panel.tolist()
    grouping = Grouping(list_panel, names=['firms', 'year'])
    np.testing.assert_array_equal(grouping.group_names, ['firms', 'year'])
    np.testing.assert_array_equal(grouping.index_shape, (11, 20))

    # make a list multi-index grouping
    list_groups = multi_index_groups.tolist()
    grouping = Grouping(list_groups, names=['educ', 'income', 'TVnews'])
    np.testing.assert_array_equal(grouping.group_names,
                                  ['educ', 'income', 'TVnews'])
    np.testing.assert_array_equal(grouping.index_shape, (7, 24, 8))

    # single-variable index grouping
    index_group = multi_index_panel.get_level_values(0)
    grouping = Grouping(index_group)
    # the original multi_index_panel had it's name changed inplace above
    np.testing.assert_array_equal(grouping.group_names, ['firms'])
    np.testing.assert_array_equal(grouping.index_shape, (220, ))

    # single variable list grouping
    list_group = multi_index_panel.get_level_values(0).tolist()
    grouping = Grouping(list_group)
    np.testing.assert_array_equal(grouping.group_names, ["group0"])
    np.testing.assert_array_equal(grouping.index_shape, 11 * 20)

    # test generic group names
    grouping = Grouping(list_groups)
    np.testing.assert_array_equal(grouping.group_names,
                                  ['group0', 'group1', 'group2'])