Always report total number of tests being run (#113)

* Always report # tests being run.

* Fix test

* Update src/ParallelTestRunner.jl

Co-authored-by: Mosè Giordano <765740+giordano@users.noreply.github.com>

* Adapt test

---------

Co-authored-by: Mosè Giordano <765740+giordano@users.noreply.github.com>

Author: christiangnrd

src/ParallelTestRunner.jl

@@ -789,7 +789,7 @@ function runtests(mod::Module, args::ParsedArgs;
     # determine parallelism
     jobs = something(args.jobs, default_njobs())
     jobs = clamp(jobs, 1, length(tests))
-    println(stdout, "Running $jobs tests in parallel. If this is too many, specify the `--jobs=N` argument to the tests, or set the `JULIA_CPU_THREADS` environment variable.")
+    println(stdout, "Running $(length(tests)) tests using $jobs parallel jobs. If this is too many concurrent jobs, specify the `--jobs=N` argument to the tests, or set the `JULIA_CPU_THREADS` environment variable.")
     workers = fill(nothing, jobs)
 
     t0 = time()

test/runtests.jl

@@ -399,7 +399,7 @@ end
     njobs = 1
     runtests(ParallelTestRunner, ["--jobs=$(njobs)"]; testsuite, stdout=ioc, stderr=ioc)
     str = String(take!(io))
-    @test contains(str, "Running $(njobs) tests in parallel")
+    @test contains(str, "Running $(length(testsuite)) tests using $(njobs) parallel jobs")
     @test ParallelTestRunner.ID_COUNTER[] == old_id_counter + njobs
 end