Add some debug printing to help when running the tests on a local clu…

…ster

Co-authored-by: jbphyswx <[email protected]>

test/script.jl

@@ -3,7 +3,7 @@
 # We don't use `using Foo` here.
 # We either use `using Foo: hello, world`, or we use `import Foo`.
 # https://github.com/JuliaLang/julia/pull/42080
-using Distributed: addprocs, workers, nworkers, remotecall_fetch
+using Distributed: addprocs, workers, nworkers, remotecall_fetch, @everywhere
 using SlurmClusterManager: SlurmManager
 
 addprocs(SlurmManager())
@@ -21,8 +21,19 @@ const hosts = map(workers()) do id
 end
 sort!(hosts)
 
-# We don't use `@assert` here, for reason described above.
-if hosts != ["c1", "c1", "c2", "c2"]
-  msg = "Test failed: observed_hosts=$(hosts) does not match expected_hosts=[c1, c1, c2, c2]"
-  error(msg)
+const is_ci = parse(Bool, strip(get(ENV, "CI", "false")))
+
+if is_ci
+  # We don't use `@assert` here, for reason described above.
+  if hosts != ["c1", "c1", "c2", "c2"]
+    msg = "Test failed: observed_hosts=$(hosts) does not match expected_hosts=[c1, c1, c2, c2]"
+    error(msg)
+  end
+else
+  # The specific hostnames of c1 and c2 are specific to the CI setup.
+  # We don't expect people to have the same hostnames if they run the test suite locally.
+  @warn "This is not CI, so we will skip the hostname test"
 end
+
+@everywhere import Distributed
+@everywhere println("Host $(Distributed.myid()): $(gethostname())") # workers report in