1 files changed, 67 insertions, 0 deletions
diff --git a/t/90-impl-selection.t b/t/90-impl-selection.t
new file mode 100644
index 0000000..4457dbe
--- /dev/null
+++ b/t/90-impl-selection.t
@@ -0,0 +1,67 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Test::More;
+
+sub clear_load {
+    delete $Package::{'Stash::'};
+    delete $INC{'Package/Stash.pm'};
+    delete $INC{'Package/Stash/PP.pm'};
+    delete $INC{'Package/Stash/XS.pm'};
+}
+
+my $has_xs;
+
+{
+    $has_xs = eval "require Package::Stash::XS; 1";
+    clear_load;
+}
+
+{
+    require Package::Stash;
+    warn $Package::Stash::IMPLEMENTATION;
+    is($Package::Stash::IMPLEMENTATION, $has_xs ? 'XS' : 'PP',
+       "autodetected properly");
+    can_ok('Package::Stash', 'new', "and got some methods");
+    clear_load;
+}
+
+{
+    $ENV{PACKAGE_STASH_IMPLEMENTATION} = 'PP';
+    require Package::Stash;
+    is($Package::Stash::IMPLEMENTATION, 'PP',
+       "autodetected properly");
+    can_ok('Package::Stash', 'new', "and got some methods");
+    clear_load;
+}
+
+SKIP: {
+    skip "no XS", 2 unless $has_xs;
+    $ENV{PACKAGE_STASH_IMPLEMENTATION} = 'XS';
+    require Package::Stash;
+    is($Package::Stash::IMPLEMENTATION, 'XS',
+       "autodetected properly");
+    can_ok('Package::Stash', 'new', "and got some methods");
+    clear_load;
+}
+
+{
+    $Package::Stash::IMPLEMENTATION = 'PP';
+    require Package::Stash;
+    is($Package::Stash::IMPLEMENTATION, 'PP',
+       "autodetected properly");
+    can_ok('Package::Stash', 'new', "and got some methods");
+    clear_load;
+}
+
+SKIP: {
+    skip "no XS", 2 unless $has_xs;
+    $Package::Stash::IMPLEMENTATION = 'XS';
+    require Package::Stash;
+    is($Package::Stash::IMPLEMENTATION, 'XS',
+       "autodetected properly");
+    can_ok('Package::Stash', 'new', "and got some methods");
+    clear_load;
+}
+
+done_testing;