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improve newtons_method test

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This commit is contained in:
Simon Gardling 2022-05-18 14:55:30 -04:00
parent e7e82a72b2
commit d665b72a4c
1 changed files with 28 additions and 1 deletions
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29
tests/misc.rs
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@ -170,8 +170,35 @@ fn newtons_method() {
&|x: f64| x.powf(2.0) - 1.0, &|x: f64| x.powf(2.0) - 1.0,
&|x: f64| 2.0 * x, &|x: f64| 2.0 * x,
&3.0, &3.0,
&(0.0..10.0), &(0.0..5.0),
&f64::EPSILON, &f64::EPSILON,
); );
assert_eq!(data, Some(1.0)); assert_eq!(data, Some(1.0));
let data = newtons_method(
&|x: f64| x.sin(),
&|x: f64| x.cos(),
&3.0,
&(2.95..3.18),
&f64::EPSILON,
);
assert_eq!(data, Some(std::f64::consts::PI));
let data = newtons_method(
&|x: f64| x.sin(),
&|_: f64| f64::NAN,
&0.0,
&(-10.0..10.0),
&f64::EPSILON,
);
assert_eq!(data, None);
let data = newtons_method(
&|_: f64| f64::NAN,
&|x: f64| x.sin(),
&0.0,
&(-10.0..10.0),
&f64::EPSILON,
);
assert_eq!(data, None);
} }