Use env

Author: giordano

.github/workflows/UnitTests.yml

@@ -29,6 +29,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  PARALLELTESTRUNNER_NUM_JOBS: 3
+
 jobs:
   test:
     runs-on: ${{ matrix.os }}

src/ParallelTestRunner.jl

@@ -362,7 +362,8 @@ function default_njobs(; cpu_threads = Sys.CPU_THREADS, free_memory = available_
     @show free_memory
     memory_jobs = Int64(free_memory) ÷ (2 * 2^30)
     @show memory_jobs
-    return max(1, min(jobs, memory_jobs))
+    env_var_num_jobs = tryparse(Int, get(ENV, "PARALLELTESTRUNNER_NUM_JOBS", ""))
+    return something(env_var_num_jobs, max(1, min(jobs, memory_jobs)))
 end
 
 # Historical test duration database

test/runtests.jl

@@ -223,4 +223,8 @@ end
     @test contains(str, "SUCCESS")
 end
 
+@testset begin
+    @test ParallelTestRunner.default_njobs() == 3
+end
+
 end