use /test/Project.toml instead of [extras] in /Project.toml

[Krastanov]

This PR simplifies the Project.toml file by splitting off the test dependencies in a separate PR.

The main value of doing so is avoiding annoying compat bounds on test dependencies that leads to Graphs downgrading other packages on a user's system.

Before this PR the following was not possible ] add Graphs JuliaFormatter@2 because our tests had a dependencies on JuliaFormatter==1. Now that the test environment is separate this is not an issue.

Alternative to #433 and #435 that does not require changing anything about our formatting. Of course, switching to JuliaFormatter 2 would be nice at some point, but the urgency is to make sure that our package is not downgrading other people's environments.

[Krastanov]

in #433 the concern of having Formatter for more than just tests was raised, e.g. if Formatter is used in a pre-commit hook: that is fine, as either way Formatter should not be a dependency of Graphs, rather just another package in the dev environment in which Graphs is already dev-ed (or in the root environment).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.41%. Comparing base (c001dab) to head (97a299d).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #436   +/-   ##
=======================================
  Coverage   97.41%   97.41%           
=======================================
  Files         120      120           
  Lines        6953     6953           
=======================================
  Hits         6773     6773           
  Misses        180      180           

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[simonschoelly]

I assume that this means no Manifest.toml would get added to git?

[Krastanov]

yes

[simonschoelly]

I have some issues running the tests locally now - can you try if it works for you? I create open Julia v1.12 with a new temporary project: julia --project=temp then ]add Graphs and test Graphs. Then I see errors like the one below and after a while the tests hang:

Path from parents: Error During Test at /home/simon/.julia/dev/Graphs/test/shortestpaths/utils.jl:1
  Got exception outside of a @test
  ArgumentError: Package Graphs not found in current path, maybe you meant `import/using .Graphs`.
  - Otherwise, run `import Pkg; Pkg.add("Graphs")` to install the Graphs package.
  Stacktrace:
    [1] macro expansion
      @ ./loading.jl:2296 [inlined]
    [2] macro expansion
      @ ./lock.jl:273 [inlined]
    [3] __require(into::Module, mod::Symbol)
      @ Base ./loading.jl:2271
    [4] #invoke_in_world#3
      @ ./essentials.jl:1089 [inlined]
    [5] invoke_in_world
      @ ./essentials.jl:1086 [inlined]
    [6] require(into::Module, mod::Symbol)
      @ Base ./loading.jl:2260
    [7] macro expansion
      @ ~/.julia/dev/Graphs/test/shortestpaths/utils.jl:2 [inlined]
    [8] macro expansion
      @ ~/.julia/juliaup/julia-1.11.5+0.x64.linux.gnu/share/julia/stdlib/v1.11/Test/src/Test.jl:1704 [inlined]
    [9] top-level scope
      @ ~/.julia/dev/Graphs/test/shortestpaths/utils.jl:2
   [10] include(fname::String)
      @ Main ./sysimg.jl:38
   [11] macro expansion
      @ ~/.julia/dev/Graphs/test/runtests.jl:177 [inlined]
   [12] macro expansion
      @ ~/.julia/juliaup/julia-1.11.5+0.x64.linux.gnu/share/julia/stdlib/v1.11/Test/src/Test.jl:1704 [inlined]
   [13] macro expansion
      @ ~/.julia/dev/Graphs/test/runtests.jl:175 [inlined]
   [14] macro expansion
      @ ~/.julia/juliaup/julia-1.11.5+0.x64.linux.gnu/share/julia/stdlib/v1.11/Test/src/Test.jl:1704 [inlined]
   [15] top-level scope
      @ ~/.julia/dev/Graphs/test/runtests.jl:154
   [16] include(fname::String)
      @ Main ./sysimg.jl:38
   [17] top-level scope
      @ none:6
   [18] eval
      @ ./boot.jl:430 [inlined]
   [19] exec_options(opts::Base.JLOptions)
      @ Base ./client.jl:296
   [20] _start()
      @ Base ./client.jl:531
Actual tests: Error During Test at /home/simon/.julia/dev/Graphs/test/runtests.jl:174
  Got exception outside of a @test
  LoadError: ArgumentError: Package Graphs not found in current path, maybe you meant `import/using .Graphs`.
  - Otherwise, run `import Pkg; Pkg.add("Graphs")` to install the Graphs package.
  Stacktrace:

[Krastanov]

The following worked for me (maybe the difference is using add with(out) specifying the branch of the repo -- there are some differences between add package_name and add package_repo with respect to tags and branches that I have not tried to understand):

> julia +1.12 --project=an_empty_folder -tauto,auto
pkg> add Graphs#moderntoml
pkg> test Graphs
... the usual output