37 lines
959 B
Rust
37 lines
959 B
Rust
use revsqrt::*;
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use cucumber::{given, then, when, World};
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use rand;
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#[derive(Debug, Default, World)]
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pub struct NumWorld {
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number: f32,
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result: f32,
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}
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// is n about the same as m?
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fn about_same(n: f32, m: f32) -> bool {
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(n - m)*1000f32 < 1f32
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}
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// Steps are defined with `given`, `when` and `then` attributes.
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#[given(regex = r"^a number$")]
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async fn hungry_cat(world: &mut NumWorld) {
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world.number = rand::random();
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}
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#[when("We calculate the the inverted square root of a number using fast inverted square root")]
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async fn calc_fast_inv_sqrt(world: &mut NumWorld) {
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world.result = revsqrt::fast_inverse_sqrt(world.number);
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}
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#[then("The result is about the same as if we calculate it normally")]
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async fn comp_result_with_normal(world: &mut NumWorld) {
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assert!(about_same(world.number, world.result));
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}
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#[tokio::main]
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async fn main() {
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futures::executor::block_on(NumWorld::run("tests/features/book/revsqrt.feature"));
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}
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