easy-assert crate, which will help you to create better tests
Add dependency to your Cargo.toml
[dev-dependencies]
assert-that = "0.2.1"
Example:
NumericAssert::assert_that(actual(-1)).is_equal().to(expected(-1));
If you need custom description, or you can't implement Display trait)
StringAssert::assert_that(actual_with(value, description_fucntion)) .length() .is(expected_with(5, description_fucntion));
If you need custom match:
CustomAssert::assert_that(actual(val1)) .matches_by(|a, b| a.eq(b)) .to(expected(val2));
Available assertions:
NumericAssert -> is_equal, is_not_equal, is_less, is_less_or_equal, is_greater, is_greater_or_equal
StringAssert -> is_equal, is_not_equal, length, contains
BooleanAssert -> is_true, is_false
OptionAssert -> is_none, is_some, contains for now only with custom assertion or with list assertion
ListAssert ->
length;
with_element_matcher ->
is_equal_to ->
in_any_order;
in_order;
contains ->
in_any_order;
in_exact_order; - [A,B,C,A,D].contains([B,C]).in_exact_order() = true/[A,B,C,A,D].contains([B,D]).in_exact_order() = false
just_in_order; - [A,B,C,A,D].contains([B,C]).in_exact_order() = true/[A,B,C,A,D].contains([B,D]).in_exact_order() = true
is_not_equal_to ->
in_any_order; - At least one element should be different
in_order; - All elements can be same, but order different
does_not_contain ->
all(); - All elements from expected should be missed in actual
at_least_one(); - At least one element from expected should be missed in actual
CustomAssert -> matches_by
It is open source, feel free to submit merge requests or propose improvements.