adding line_number test + updating some testing infrastructure

[DIvkov575]

resolves #601

• adding line_number test into new file integration.rs
• moving tests from filter.rs -> integration.rs
• updating logger from filter.rs in order to support both filter and line_number tests

[DIvkov575]

I think that the log method is not actually being called. I attempted to add various debug statements into the log method of the logger, and the debugging statements did not execute.

Could somebody please let me know if I am creating a logger instance incorrectly?

[DIvkov575]

@Thomasdezeeuw Is it ok for me to ping you for help?

[Thomasdezeeuw]

@Thomasdezeeuw Is it ok for me to ping you for help?

Yes, sorry I don't have time to look at this today, maybe tomorrow.

[Thomasdezeeuw]

I think that the log method is not actually being called. I attempted to add various debug statements into the log method of the logger, and the debugging statements did not execute.

Could somebody please let me know if I am creating a logger instance incorrectly?

You need to call log::set_max_level(log::LevelFilter::Trace), by default all logs are filtered out.

[DIvkov575]

@Thomasdezeeuw Thank you!

[DIvkov575]

@Thomasdezeeuw

Do you know what might be causing MSRV to fail? Since the error is typically SetLoggerError, I think there might a preexisting logger blocking the 'setting' of a new one.

I was also wondering, how does the test build script work if it's just printing things? (It seems the necessary lib_build attribute is never passed to the tests, so when I had #[cfg_attr(lib_build, test)] my test was not recognized)

Thank You! Your answers mean a lot to me!

[KodrAus]

Hmm, that test infrastructure is all a bit tangled I think. I wonder if it would be easier to rename filters.rs to something like integration.rs and try combine this test into it? I think they are being treated as regular unit tests so can conflict trying to set the global logger.

[DIvkov575]

I can try and combine them. However when combining them, should i just create a tuple (representing the state) or store the entire record (this might be problematic because Im pretty sure that not all of the sub-structs implement sync/send)?

[KodrAus]

I think defining a struct with just the state we want to test would cover it. It would be difficult to try capture the whole record, like you suggested it’s full of borrowed data and there’s no built-in way to create a shared version of one.

[DIvkov575]

@KodrAus Not sure if my approach is wrong ... Im trying to creating a global state instance by using lazy_static and Arc

• a global AtomicBool to determine whether the setup function (containing setlogger) has been executed

Should I change my approach in order to avoid external dependencies or should I use lazy_static/once_cell/std::sync::LazyStatic (stabilized only in 1.70)?

Also, will it be a problem if the tests will need to be executed sequentially?

[KodrAus]

@DIvkov575 It might be easier if we just roll the line number tests into exactly the main that we currently have. So the function test in there becomes test_filters, and we add a new one for the line number tests called test_line (or something along those lines) that we also call within that main where we've got an Arc<State> in scope. The change you've made to the State struct itself looks right. What do you think?

[DIvkov575]

@KodrAus That will certainly simplify things. I just wasn't sure how important creating distinct/specific test was.

[DIvkov575]

@KodrAus Just out of curiosity, what does the test harness do in Cargo.toml? I just saw the harnesses would be enabled/disabled but alternative harnesses were never passed as arguments.

Otherwise Is this good to merge?

[KodrAus]

Just out of curiosity, what does the test harness do in Cargo.toml?

This infrastructure here is all quite old, and I think it's mostly organized this way to test the max level Cargo features. I think setting harness = false makes cargo test run your binary as the test instead of looking for #[test] attributes in the file. I think it's mostly useful if you're plugging in a totally different tool to run your tests and I haven't really used it myself.

Nice job finding your way through this very non-standard piece of Rust!

[Thomasdezeeuw]

Thanks @DIvkov575

[DIvkov575]

Just out of curiosity, what does the test harness do in Cargo.toml?

This infrastructure here is all quite old, and I think it's mostly organized this way to test the max level Cargo features. I think setting harness = false makes cargo test run your binary as the test instead of looking for #[test] attributes in the file. I think it's mostly useful if you're plugging in a totally different tool to run your tests and I haven't really used it myself.

Nice job finding your way through this very non-standard piece of Rust!

Thank you