Always activate test env on workers

[nickrobinson251]

Fix #228

Before this PR the newly added test would fail (like below)

$ julia --project -q
julia> using ReTestItems
Precompiling ReTestItems
  1 dependency successfully precompiled in 1 seconds. 2 already precompiled.

julia> pkg = "test/packages/TestOnlyDeps";

julia> cmd = ```
           $(Base.julia_cmd()) --project=$(pkg) -e '
               using ReTestItems, TestOnlyDeps; runtests(TestOnlyDeps; nworkers=1)'
           ```;

julia> run(addenv(cmd, "JULIA_PROJECT" => pkg));
  Activating project at `~/repos/ReTestItems.jl/test/packages/TestOnlyDeps`
┌ Warning: The project dependencies or compat requirements have changed since the manifest was last resolved.
│ It is recommended to `Pkg.resolve()` or consider `Pkg.update()` if necessary.
└ @ Pkg.API ~/repos/rai-julia/usr/share/julia/stdlib/v1.10/Pkg/src/API.jl:1807
[ Info: Scanning for test items in project `TestOnlyDeps` at paths: /Users/nickr/repos/ReTestItems.jl/test/packages/TestOnlyDeps
[ Info: Finished scanning for test items in 0.49 seconds.
[ Info: Scheduling 2 tests on pid 56288 with 1 worker processes and 2 threads per worker.
[ Info: Starting test workers
  Worker 56513:  [ Info: Starting test worker 1 on pid = 56513, with 2 threads
[ Info: Starting running test items
  Worker 56513:  15:57:53 | maxrss  0.5% | mem 59.5% | START (1/2) test item "use a test-only dep" at test/deps_tests.jl:1
  Worker 56513:  15:57:53 | maxrss  0.6% | mem 59.6% | DONE  (1/2) test item "use a test-only dep" 0.4 secs

No Captured Logs for test item "use a test-only dep" at test/deps_tests.jl:1 on worker 56513
Error in testset "use a test-only dep" on worker 56513:
Error During Test at /Users/nickr/repos/ReTestItems.jl/test/packages/TestOnlyDeps/test/deps_tests.jl:1
  Got exception outside of a @test
  ArgumentError: Package Example not found in current path.
  - Run `import Pkg; Pkg.add("Example")` to install the Example package.
  Stacktrace:
    [1] macro expansion
      @ ./loading.jl:1772 [inlined]
    [2] macro expansion
      @ ./lock.jl:349 [inlined]
    [3] __require(into::Module, mod::Symbol)
      @ Base ./loading.jl:1753
    [4] #invoke_in_world#2
      @ ./essentials.jl:926 [inlined]
    [5] invoke_in_world
      @ ./essentials.jl:923 [inlined]
    [6] require(into::Module, mod::Symbol)
      @ Base ./loading.jl:1746
    [7] eval
      @ ./boot.jl:403 [inlined]
    [8] #77
      @ ~/repos/ReTestItems.jl/src/ReTestItems.jl:1142 [inlined]
    [9] with_source_path(f::ReTestItems.var"#77#78"{Expr}, path::String)
      @ ReTestItems ~/repos/ReTestItems.jl/src/ReTestItems.jl:965
   [10] (::ReTestItems.var"#75#76"{TestItem, String, Expr, Expr})()
      @ ReTestItems ~/repos/ReTestItems.jl/src/ReTestItems.jl:1142
   [11] redirect_stdio(f::ReTestItems.var"#75#76"{TestItem, String, Expr, Expr}; stdin::Nothing, stderr::IOContext{IOStream}, stdout::IOContext{IOStream})
      @ Base ./stream.jl:1413
   [12] redirect_stdio
      @ ./stream.jl:1376 [inlined]
   [13] _redirect_logs(f::ReTestItems.var"#75#76"{TestItem, String, Expr, Expr}, target::IOStream)
      @ ReTestItems ~/repos/ReTestItems.jl/src/log_capture.jl:124
   [14] #_redirect_logs##0
      @ ~/repos/ReTestItems.jl/src/log_capture.jl:107 [inlined]
   [15] open(::ReTestItems.var"#_redirect_logs##0#_redirect_logs##1"{ReTestItems.var"#75#76"{TestItem, String, Expr, Expr}}, ::String, ::Vararg{String}; kwargs::@Kwargs{})
      @ Base ./io.jl:396
   [16] open
      @ ./io.jl:393 [inlined]
   [17] _redirect_logs
      @ ~/repos/ReTestItems.jl/src/log_capture.jl:107 [inlined]
   [18] macro expansion
      @ ~/repos/ReTestItems.jl/src/macros.jl:82 [inlined]
   [19] runtestitem(ti::TestItem, ctx::ReTestItems.TestContext; test_end_expr::Expr, logs::Symbol, verbose_results::Bool, finish_test::Bool, catch_test_error::Bool, failfast::Bool)
      @ ReTestItems ~/repos/ReTestItems.jl/src/ReTestItems.jl:1139
   [20] top-level scope
      @ none:1
   [21] eval
      @ ./boot.jl:403 [inlined]
   [22] execute
      @ ~/repos/ReTestItems.jl/src/workers.jl:334 [inlined]
   [23] (::ReTestItems.Workers.var"#serve_requests##0#serve_requests##1"{Sockets.TCPSocket, ReentrantLock, ReTestItems.Workers.Request})()
      @ ReTestItems.Workers ~/repos/ReTestItems.jl/src/workers.jl:348

  Worker 56513:  15:57:54 | maxrss  0.6% | mem 59.6% | START (2/2) test item "deps as expected" at test/deps_tests.jl:6
  Worker 56513:  15:57:54 | maxrss  0.6% | mem 59.6% | DONE  (2/2) test item "deps as expected" <0.1 secs (90.1% compile), 16.75 K allocs (1.283 MB)
[ Info: All tests on worker 1 completed. Closing Worker(pid=56513).
  Worker 56513:  [56513] signal (15): Terminated: 15
in expression starting at none:1

[ Tests Completed: 2/2 test items were run.
Test Summary:             | Pass  Error  Total  Time
TestOnlyDeps              |    1      1      2  3.0s
  test                    |    1      1      2
    test/deps_tests.jl    |    1      1      2
      use a test-only dep |           1      1  0.4s
      deps as expected    |    1             1  0.0s
ERROR: Some tests did not pass: 1 passed, 0 failed, 1 errored, 0 broken.
ERROR: failed process: Process(setenv(`/Users/nickr/repos/rai-julia/usr/bin/julia -C native -J/Users/nickr/repos/rai-julia/usr/lib/julia/sys.dylib -g1 --project=test/packages/TestOnlyDeps -e '
    using ReTestItems, TestOnlyDeps; runtests(TestOnlyDeps; nworkers=1)'`

[Copilot]

Pull Request Overview

This PR fixes issue #228 where test-only dependencies (specified in [extras] and [targets] sections of Project.toml) were not available on worker processes when running tests with nworkers > 0 and JULIA_PROJECT set.

Key changes:

• Workers now explicitly activate the test environment by capturing and setting the active project on worker startup
• Added comprehensive test package TestOnlyDeps.jl to verify test-only dependencies work correctly with workers

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

File	Description
src/ReTestItems.jl	Captures the active project and sets it on worker processes to ensure test environment is activated
test/integrationtests.jl	Adds regression test for issue #228 that runs tests with workers and test-only deps
test/packages/TestOnlyDeps/*	New test package demonstrating test-only dependency usage
test/packages/README.md	Documents the new TestOnlyDeps.jl test package

---

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[Drvi]

Thanks!