verify unusual PER canonical order
diff --git a/tests/tests-asn1c-compiler/157-per-canonical-order-OK.asn1 b/tests/tests-asn1c-compiler/157-per-canonical-order-OK.asn1
new file mode 100644
index 0000000..d35e052
--- /dev/null
+++ b/tests/tests-asn1c-compiler/157-per-canonical-order-OK.asn1
@@ -0,0 +1,20 @@
+
+-- OK: Everything is fine
+
+-- iso.org.dod.internet.private.enterprise (1.3.6.1.4.1)
+-- .spelio.software.asn1c.test (9363.1.5.1)
+-- .157
+
+ModulePERCanonicalOrder
+ { iso org(3) dod(6) internet(1) private(4) enterprise(1)
+ spelio(9363) software(1) asn1c(5) test(1) 157 }
+DEFINITIONS ::= BEGIN
+
+ T ::= CHOICE {
+ one [4] NULL,
+ two [3] NULL,
+ three [1] NULL,
+ four [2] NULL
+ }
+
+END