Test suite: Add more test coverage for warn_if_unexpected_params()

Author: DilumAluthge

test/unit.jl

@@ -24,3 +24,11 @@ end
     @test_throws ErrorException SlurmClusterManager.get_slurm_jobid_int()
   end
 end
+
+@testset "warn_if_unexpected_params()" begin
+  params = Dict(:env => ["foo" => "bar"])
+  @test_logs(
+    (:warn, "The user provided the `env` kwarg, but SlurmClusterManager.jl's support for the `env` kwarg requires Julia 1.6 or later"),
+    SlurmClusterManager.warn_if_unexpected_params(params),
+  )
+end