rustlings/exercises/test2.rs

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2019-01-24 02:48:01 +07:00
// test2.rs
// This is a test for the following sections:
// - Tests
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// This test isn't testing our function -- make it do that in such a way that
// the test passes. Then write a second test that tests that we get the result
// we expect to get when we call `times_two` with a negative number.
// No hints, you can do this :)
pub fn times_two(num: i32) -> i32 {
num * 2
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn returns_twice_of_positive_numbers() {
assert_eq!(times_two(4), ???);
}
#[test]
fn returns_twice_of_negative_numbers() {
// TODO write an assert for `times_two(-4)`
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}
}