test/Preprocessor/Inputs/nonportable-hmaps/foo.hmap.json

{
  "mappings" :
    {
     "Foo/Foo.h" : "headers/foo/Foo.h",
     "Bar.h" : "headers/foo/Bar.h",
     "Foo/Bar.h" : "INPUTS_DIR/nonportable-hmaps/headers/foo/Bar.h",
     "headers/Foo/Baz.h" : "/not/existing/absolute/path/Baz.h"
    }
}