1 files changed, 19 insertions, 0 deletions
diff --git a/t/symmetric.t b/t/symmetric.t
new file mode 100644
index 0000000..4a91646
--- /dev/null
+++ b/t/symmetric.t
@@ -0,0 +1,19 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Test::More;
+
+use Games::SMTNocturne::Demons 'fuse';
+
+for my $demon1 (Games::SMTNocturne::Demons::Demon->all_demons) {
+    for my $demon2 (Games::SMTNocturne::Demons::Demon->all_demons) {
+        next if $demon1 eq $demon2;
+
+        my $fusion1 = fuse($demon1, $demon2);
+        my $fusion2 = fuse($demon2, $demon1);
+
+        is(fuse($demon1, $demon2), fuse($demon2, $demon1));
+    }
+}
+
+done_testing;