# @test\_warn doesn't work with @warn in 0.7
**URL:** https://discourse.julialang.org/t/test-warn-doesnt-work-with-warn-in-0-7/9001
**Category:** Internals & Design
**Created:** [February 11, 2018, 5:48pm UTC](https://discourse.julialang.org/t/test-warn-doesnt-work-with-warn-in-0-7/9001 "2018-02-11T17:48:56Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@tk3369](https://discourse.julialang.org/u/tk3369)
#### Post date: [February 11, 2018, 5:48pm UTC](https://discourse.julialang.org/t/test-warn-doesnt-work-with-warn-in-0-7/9001/1 "2018-02-11T17:48:56Z")
I’m trying to make a package work on 0.7 but the unit test is failing like this… (I converted `warn` to `@warn` per suggestion from the deprecation warnings.)
```julia
julia> foo() = @warn("hello")
foo (generic function with 1 method)
julia> Test.@test_warn "hello" foo()
┌ Warning: hello
└ @ Main REPL[1]:1
Test Failed at /Users/osx/buildbot/slave/package_osx64/build/usr/share/julia/site/v0.7/Test/src/Test.jl:546
Expression: contains_warn(read(fname, String), $(Expr(:escape, "hello")))
ERROR: There was an error during testing
julia> versioninfo()
Julia Version 0.7.0-DEV.3551
Commit 0a42222e8f (2018-01-24 02:08 UTC)
Platform Info:
OS: macOS (x86_64-apple-darwin14.5.0)
CPU: Intel(R) Core(TM) i5-4258U CPU @ 2.40GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-3.9.1 (ORCJIT, haswell)
```
---
### Author:  [@fredrikekre](https://discourse.julialang.org/u/fredrikekre)
#### Post date: [February 12, 2018, 3:16pm UTC](https://discourse.julialang.org/t/test-warn-doesnt-work-with-warn-in-0-7/9001/2 "2018-02-12T15:16:40Z")
```julia
help?> Test.@test_logs
@test_logs [log_patterns...] [keywords] expression
Collect a list of log records generated by expression using collect_test_logs, check that they match the sequence log_patterns, and return the value of expression. The keywords provide some simple filtering
of log records: the min_level keyword controls the minimum log level which will be collected for the test, the match_mode keyword defines how matching will be performed (the default :all checks that all logs
and patterns match pairwise; use :any to check that the pattern matches at least once somewhere in the sequence.)
The most useful log pattern is a simple tuple of the form (level,message). A different number of tuple elements may be used to match other log metadata, corresponding to the arguments to passed to
AbstractLogger via the handle_message function: (level,message,module,group,id,file,line). Elements which are present will be matched pairwise with the log record fields using == by default, with the special
cases that Symbols may be used for the standard log levels, and Regexs in the pattern will match string or Symbol fields using contains.
Examples
≡≡≡≡≡≡≡≡≡≡
Consider a function which logs a warning, and several debug messages:
function foo(n)
@info "Doing foo with n=$n"
for i=1:n
@debug "Iteration $i"
end
42
end
We can test the info message using
@test_logs (:info,"Doing foo with n=2") foo(2)
If we also wanted to test the debug messages, these need to be enabled with the min_level keyword:
@test_logs (:info,"Doing foo with n=2") (:debug,"Iteration 1") (:debug,"Iteration 2") min_level=Debug foo(2)
The macro may be chained with @test to also test the returned value:
@test (@test_logs (:info,"Doing foo with n=2") foo(2)) == 42
```
---
### Author:  [@tk3369](https://discourse.julialang.org/u/tk3369)
#### Post date: [February 12, 2018, 3:28pm UTC](https://discourse.julialang.org/t/test-warn-doesnt-work-with-warn-in-0-7/9001/3 "2018-02-12T15:28:22Z")
Nice, that works in 0.7 (as a workaround?)
But then `@test_logs` does not exist in 0.6 or Compat.Test…
```julia
julia> Compat.Test.@
@inferred @test_approx_eq @test_broken @test_skip @test_warn
@test @test_approx_eq_eps @test_nowarn @test_throws @testset
```