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How to use test_is_length_failure method in assertpy

Best Python code snippet using assertpy_python

test_dict.py

...29import collections30from assertpy import assert_that, fail31def test_is_length():32    assert_that({'a': 1, 'b': 2}).is_length(2)33def test_is_length_failure():34    try:35        assert_that({'a': 1, 'b': 2, 'c': 3}).is_length(4)36        fail('should have raised error')37    except AssertionError as ex:38        assert_that(str(ex)).contains('to be of length <4>, but was <3>.')39def test_contains():40    assert_that({'a': 1, 'b': 2, 'c': 3}).contains('a')41    assert_that({'a': 1, 'b': 2, 'c': 3}).contains('a', 'b')42    if sys.version_info[0] == 3:43        ordered = collections.OrderedDict([('z', 9), ('x', 7), ('y', 8)])44        assert_that(ordered).contains('x')45def test_contains_empty_arg_failure():46    try:47        assert_that({'a': 1, 'b': 2, 'c': 3}).contains()...

test_list.py

Source: test_list.py

...32    assert_that(['a', 'b', 'c']).is_length(3)33    assert_that((1, 2, 3, 4)).is_length(4)34    assert_that({'a': 1, 'b': 2}).is_length(2)35    assert_that(set(['a', 'b'])).is_length(2)36def test_is_length_failure():37    try:38        assert_that(['a', 'b', 'c']).is_length(4)39        fail('should have raised error')40    except AssertionError as ex:41        assert_that(str(ex)).is_equal_to("Expected <['a', 'b', 'c']> to be of length <4>, but was <3>.")42def test_is_length_bad_arg_failure():43    try:44        assert_that(['a', 'b', 'c']).is_length('bar')45        fail('should have raised error')46    except TypeError as ex:47        assert_that(str(ex)).is_equal_to('given arg must be an int')48def test_is_length_negative_arg_failure():49    try:50        assert_that(['a', 'b', 'c']).is_length(-1)...

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