2 unstable releases
0.1.0 | Sep 17, 2024 |
---|---|
0.0.0 | Sep 8, 2024 |
#496 in Rust patterns
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Used in 2 crates
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test_help-rs
Test helpers for Rust
Introduction
Rust has powerful and easy-to-use unit-testing mechanisms, but there are some missing elements, particular around the use of floating-point values - f32
and f64
- that are provided by this crate to allowing for assertion of approximate equality, as in:
use test_helpers::{
assert_scalar_eq_approx,
assert_vector_eq_approx,
margin,
multiplier,
};
#[test]
fn example_test_of_scalar_evaluation() {
let expected = 3.0;
let actual = 3.0001;
assert_scalar_eq_approx!(expected, actual, margin(0.0001));
}
#[test]
fn example_test_of_vector_evaluation() {
let expected = &[ 3.0, -40404.0, 1.23456 ];
let actual = Vec::from([ 3.0, -40410.0, 1.234567 ]);
assert_vector_eq_approx!(expected, actual, multiplier(0.00015));
}
Table of Contents
Installation
Reference in Cargo.toml in the usual way:
test_help-rs = { version = "~0.1" }
Components
Constants
The following constants are defined:
DEFAULT_MARGIN
- specifies the default comparison margin value, which is a xxxx;DEFAULT_MULTIPLIER
- specifies the default comparison multiplier value, which is a xxxx;
Enumerations
The following enuemrations are defined:
ComparisonResult
- ... TBC;VectorComparisonResult
- ... TBC;
Functions
The following functions are defined:
margin() -> impl ApproximateEqualityEvaluator
- creates an implementation of theApproximateEqualityEvaluator
trait that defines a margin-based evaluator instance;multiplier() -> impl ApproximateEqualityEvaluator
- creates an implementation of theApproximateEqualityEvaluator
trait that defines a multiplier-based evaluator instance;zero_margin_or_multiplier() -> impl ApproximateEqualityEvaluator
- creates an implementation of theApproximateEqualityEvaluator
trait that defines both a margin to be used when expected value and/or actual value is zero, and a multiplier to be used in all other cases;evaluate_scalar_eq_approx()
- a generic function that may be used to compare expected and actual scalar values of types that are logicallyf64
, along with an evaluator (of type&dyn ApproximateEqualityEvaluator
). This function is used in the crate macros, but may also be used as part of the implementation of such macros for testing application-defined types;evaluate_vector_eq_approx()
- a generic function that may be used to compare expected and actual values that are vectors of types that are logicallyf64
, along with an evaluator (of type&dyn ApproximateEqualityEvaluator
). This function is used in the crate macros, but may also be used as part of the implementation of such macros for testing application-defined types;
Macros
The following macros are defined:
assert_scalar_eq_approx!()
- asserts approximate equality of expected and actual values, with an optional evaluator;assert_scalar_ne_approx!()
- asserts approximate inequality of expected and actual values, with an optional evaluator;assert_vector_eq_approx!()
- asserts approximate equality of expected and actual vectors of values, with an optional evaluator;assert_vector_ne_approx!()
- asserts approximate inequality of expected and actual vectors of values, with an optional evaluator;
Structures
No public structures are defined at this time.
Traits
The following traits are defined:
ApproximateEqualityEvaluator
- prescribes the (non-mutating) instance method#evaluate()
, allowing custom evaluators to be defined for use with the assertion macros;TestableAsF64
- prescribes the (non-mutating) instance method#testable_as_f64() : f64
, and provides implementation for any type that implements theToF64
trait defined in the base-traits crate;
Examples
T.B.C.
Project Information
Where to get help
Contribution guidelines
Defect reports, feature requests, and pull requests are welcome on https://github.com/synesissoftware/test_help-rs.
Dependencies
Crates upon which test_help-rs depend:
Dev Dependencies
None currently.
Related projects
- shwild.Rust defines functionality for matching strings against SHell-compatible WILDcard patterns, including matching assertion macros that are useful in unit-testing;
License
test_help-rs is released under the 3-clause BSD license. See LICENSE for details.
Dependencies
~145KB