How to write test cases

[zackfall]

I was trying to use this with rust, but I don't really know how to start, I mean, I writed a simple lib to do tests but when I added a test case, it doesn't take the inputs, so I don't really know what to do, and sorry if this is a dummy question, I never tried something like this before.

[xeluxee]

Launch :CompetitestAdd, write input and output and press CTRL-s to save Then launch :CompetitestRun

[zackfall]

Yeah, I did that. I created a lib where I created a function sum

fn sum(x: i32, y: i32) -> i32 {
    x + y
}

// Then I created the test module
#[cfg(test)]
mod tests {
    use super::*;
    #[test]
    fn it_works() {
        let result = sum(5, 3);
        assert_eq!(result, 8);
    }
}

Then I executed CompetitestAdd and I writed 5, 6 to try with just one input and I saved the testcase, then I run the testcases but when I was watching the test case I wrote, it does not output anything, because there wasn't a main function, so the stderr of the compile case show that error. When i created a main function, Only the println I created calling the sum function was in the output, so I don't know how I have to do to make it work

[xeluxee]

I'm not understanding what you are trying to do. Why are you defining a function to check the result? What do you expect competitest to do? Competitest does the following:

• compiles your source file (with rustc filename.rs for rust)
• runs the executable
• sends input text on stdin
• takes stdout and displays it in output popup
• compares stdout and the correct answer (provided by you in output popup after launching :CompetiTestAdd), establishing whether your solution was correct or not

So yes, main is needed because your program must read from stdin and print to stdout (see https://github.com/xeluxee/competitest.nvim#usage-notes)

[zackfall]

Ooooh, okay i got it now, thanks, I though it was something like the test that occurs in exercism. Thanks a lot

[xeluxee]

You're welcome. CompetiTest is designed for competitive programming contest, as the ones held on codeforces. The name itself is the union of Competitive and Tester