Test suite: save the original Base.DEPOT_PATH and Base.LOAD_PATH …

…before running a test set, and restore them after running the test set

test/testdefs.jl

@@ -21,7 +21,19 @@ function runtests(name, path, isolate=true; seed=nothing)
         res_and_time_data = @timed @testset "$name" begin
             # Random.seed!(nothing) will fail
             seed != nothing && Random.seed!(seed)
+
+            # Save the original `Base.DEPOT_PATH` and `Base.LOAD_PATH`
+            original_depot_path = copy(Base.DEPOT_PATH)
+            original_load_path = copy(Base.LOAD_PATH)
+
             Base.include(m, "$path.jl")
+
+            # Restore the original `Base.DEPOT_PATH` and `Base.LOAD_PATH`
+            empty!(Base.DEPOT_PATH)
+            empty!(Base.LOAD_PATH)
+            append!(Base.DEPOT_PATH, original_depot_path)
+            append!(Base.LOAD_PATH, original_load_path)
+
         end
         rss = Sys.maxrss()
         #res_and_time_data[1] is the testset