1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/idempotence.sh b/src/test/idempotence.sh
new file mode 100755
index 00000000..5527680d
--- /dev/null
+++ b/src/test/idempotence.sh
@@ -0,0 +1,14 @@
+#!/bin/sh -e
+input=$1
+sail=../sail.native
+
+output1=`mktemp  --suffix=.sail`
+echo Pretty-printing $input
+$sail -verbose $input > $output1
+
+output2=`mktemp  --suffix=.sail`
+echo Pretty-printing pretty-printed
+$sail -verbose $output1 > $output2
+
+diff -u $output1 $output2 && \
+  (rm -f $output1 $output2; echo Idempotence: ok)