Smoke test /base and /test from JuliaLang/julia

test/runtests.jl

@@ -933,3 +933,20 @@ end
             "begin\n    $(otriple)\n    a\\\n    b\n    $(ctriple)\nend"
     end
 end
+
+
+const share_julia = joinpath(Sys.BINDIR, Base.DATAROOTDIR, "julia")
+if Sys.isunix() && isdir(share_julia)
+    @testset "JuliaLang/julia" begin
+        for testfolder in joinpath.(share_julia, ("base", "test"))
+            for (root, _, files) in walkdir(testfolder)
+                for file in files
+                    endswith(file, ".jl") || continue
+                    path = joinpath(root, file)
+                    # @show path
+                    @test Runic.format_file(path, "/dev/null") === nothing
+                end
+            end
+        end
+    end
+end