Failed to run test after recent upgrade. about neotest-rust HOT 10 CLOSED

@rouge8 Same here

It seems the right command should be cargo test not cargo nextest

No, that's not correct. As it says in the README, this plugin works with cargo-nextest.

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Can you provide an example that triggers this?

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I was running this simple code:

#[cfg(test)]
mod tests {
    #[test]
    fn test() {
        let mut i: u8 = 255;
        i += 1;
    }
}

For some reason, it works now.

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Sorry for the last post, this test fails:

#[cfg(test)]
mod tests {
    #[test]
    fn test() {
        let mut i: u8 = 255;
        i = i.wrapping_add(1);
        assert_eq!(i, 0);
    }
}

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Seems to work for me, running neotest on this main.rs:

fn main() {
    println!("Hello, world!");
}

#[cfg(test)]
mod tests {
    #[test]
    fn test() {
        let mut i: u8 = 255;
        i = i.wrapping_add(1);
        assert_eq!(i, 0);
    }
}

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@tubzby , did you try installing cargo-nextest with cargo install cargo-nextest --locked? I was getting the same error but that fixed it.

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It works now, I'm not sure what happened, sometimes when I run a test with key bindings, nothing happens, I have to switch to vs code to run the unit test.

Are there any logs that I can look into?

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@rouge8 Same here

It seems the right command should be cargo test not cargo nextest

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yes thank you, doing cargo install nextest seems to do the trick

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@rouge8 Hello!

I'v faced the same problem, at least the error I receive is the same as OP, but in my case I found out the reason.

I copied args for initialization from example:

require("neotest").setup({
  adapters = {
    require("neotest-rust") {
        args = { "--no-capture" },
    }
  }
})

That lead to cargo launches with args like

cargo nextest run --no-fail-fast --config-file /var/folders/0y/gvl9x07x341fhm6zq23ps9480000gn/T/nvim.coin/ROMNaO/0.nextest.toml --profile neotest --no-capture -E 'test(/^tests::/)'

And --no-capture lead to empty system-out/system-err nodes in xml result:

        <testcase name="tests::test_ref" classname="lobster-proxy::bin/lobster-proxy" timestamp="2023-08-12T22:26:57.410+00:00" time="0.004">
            <failure type="test failure"/>
            <system-out></system-out>
            <system-err></system-err>
        </testcase>

so the input to parse_errors method become nil.

I guarded with simple precheck for nil in local version like:

function M.parse_errors(output)
    if output == nil then
        return {}
    end
    local message, line = output:match("thread '[^']+' panicked at '([^']+)', [^:]+:(%d+):%d+")
<...>

It really took me a while, cause at the beginning I did know nothing about lua.

PS May be OP has another source of the problem, but i smashed my head a bit, before figuring out. Should I make a PR or it works like that by design?

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