expanding range: <= 31 bits now

diff --git a/skeletons/tests/check-PER.c b/skeletons/tests/check-PER.c
index 94f5fe4..5fcb1ae 100644
--- a/skeletons/tests/check-PER.c
+++ b/skeletons/tests/check-PER.c
@@ -14,22 +14,27 @@
 
 	z = per_get_few_bits(&pos, 32);
 	assert(z == -1);
+	assert(pos.nbits == sizeof(buf) * 8);
 
 	z = per_get_few_bits(&pos, 0);
 	assert(z == 0);
 	assert(pos.nboff == 0);
+	assert(pos.nbits == sizeof(buf) * 8);
 
 	z = per_get_few_bits(&pos, 1);
 	assert(z == 1);
 	assert(pos.nboff == 1);
+	assert(pos.nbits == sizeof(buf) * 8);
 
 	z = per_get_few_bits(&pos, 2);
 	assert(z == 1);
 	assert(pos.nboff == 3);
+	assert(pos.nbits == sizeof(buf) * 8);
 
 	z = per_get_few_bits(&pos, 2);
 	assert(z == 2);
 	assert(pos.nboff == 5);
+	assert(pos.nbits == sizeof(buf) * 8);
 
 	z = per_get_few_bits(&pos, 3);
 	assert(z == 7);
@@ -61,6 +66,20 @@
 	z = per_get_few_bits(&pos, 24);
 	assert(z == 14443711);
 
+	/* Get full 31-bit range */
+	pos.buffer = buf;
+	pos.nboff = 7;
+	pos.nbits = sizeof(buf) * 8;
+	z = per_get_few_bits(&pos, 31);
+	assert(z == 1179384747);
+
+	/* Get a bit shifted range */
+	pos.buffer = buf;
+	pos.nboff = 6;
+	pos.nbits = sizeof(buf) * 8;
+	z = per_get_few_bits(&pos, 31);
+	assert(z == 1663434197);
+
 	pos.buffer = buf;
 	pos.nboff = 0;
 	pos.nbits = sizeof(buf) * 8;