nalgebra/tests/assert.rs

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//! Assertion macro tests
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#[macro_use]
extern crate nalgebra;
use nalgebra::{ApproxEq, Vector2};
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use std::fmt::Debug;
// Replace the assert_approx_eq! macro so that we can have type inference.
fn test_approx_eq<T, N>(given: &T, expected: &T) where T: Debug + ApproxEq<N>, N: Debug {
if !given.approx_eq(expected) {
panic!("assertion failed: `left ≈ right` (left: `{:?}`, right: `{:?}`, tolerance: `{:?}`)",
*given, *expected,
T::approx_epsilon()
)
}
}
#[test]
fn assert_approx_eq_f64() {
let a = 1.0f64;
let b = 1.0f64 + 1.0e-12f64;
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test_approx_eq(&a, &b);
test_approx_eq(&(&a), &(&b));
}
#[test]
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#[should_panic]
fn assert_approx_eq_vec2_f32_fail() {
let a = Vector2::new(1.0f32, 0.0);
let b = Vector2::new(1.1f32, 0.1);
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test_approx_eq(&a, &b);
}
#[test]
fn assert_approx_eq_eps_f32() {
assert_approx_eq_eps!(1.0f32, 1.1, 0.2);
assert_approx_eq_eps!(&mut 1.0f32, &mut 1.1, 0.2);
}
#[test]
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#[should_panic]
fn assert_approx_eq_eps_f64_fail() {
assert_approx_eq_eps!(1.0f64, 1.1, 0.05);
}
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#[test]
fn assert_approx_eq_ulps_f32() {
let x = 1000000_f32;
let y = 1000000.1_f32;
assert!(x != y);
assert_approx_eq_ulps!(x, y, 3);
assert_approx_eq_ulps!(&x, &y, 3);
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}
#[test]
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#[should_panic]
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fn assert_approx_eq_ulps_f32_fail() {
let x = 1000000_f32;
let y = 1000000.1_f32;
assert_approx_eq_ulps!(x, y, 2);
}
#[test]
fn assert_approx_eq_ulps_f64() {
let x = 1000000_f64;
let y = 1000000.0000000003_f64;
assert!(x != y);
assert_approx_eq_ulps!(x, y, 4);
}
#[test]
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#[should_panic]
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fn assert_approx_eq_ulps_f64_fail() {
let x = 1000000_f64;
let y = 1000000.0000000003_f64;
assert!(x != y);
assert_approx_eq_ulps!(x, y, 3);
}