From f4240cc8a4545e4d2e2f926a72aa911d5373ab95 Mon Sep 17 00:00:00 2001
From: Eric Smith <brouhaha@fedoraproject.org>
Date: Thu, 15 Sep 2016 02:00:29 -0600
Subject: Add optional SEED=n command line option to Makefile, and -S n command
 line option to test scripts, for deterministic regression tests.

---
 tests/share/generate.py | 12 +++++++++++-
 tests/share/run-test.sh | 14 +++++++++++++-
 2 files changed, 24 insertions(+), 2 deletions(-)

(limited to 'tests/share')

diff --git a/tests/share/generate.py b/tests/share/generate.py
index 01a19a8d9..7e87bd648 100644
--- a/tests/share/generate.py
+++ b/tests/share/generate.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+import argparse
 import sys
 import random
 from contextlib import contextmanager
@@ -21,7 +22,16 @@ def maybe_plus_x(expr):
     else:
         return expr
 
-for idx in range(100):
+parser = argparse.ArgumentParser(formatter_class = argparse.ArgumentDefaultsHelpFormatter)
+parser.add_argument('-S', '--seed',  type = int, help = 'seed for PRNG')
+parser.add_argument('-c', '--count', type = int, default = 100, help = 'number of test cases to generate')
+args = parser.parse_args()
+
+if args.seed is not None:
+    print("PRNG seed: %d" % args.seed)
+    random.seed(args.seed)
+
+for idx in range(args.count):
     with open('temp/uut_%05d.v' % idx, 'w') as f:
         with redirect_stdout(f):
             if random.choice(['bin', 'uni']) == 'bin':
diff --git a/tests/share/run-test.sh b/tests/share/run-test.sh
index 18dbbc279..1bcd8e423 100755
--- a/tests/share/run-test.sh
+++ b/tests/share/run-test.sh
@@ -5,10 +5,22 @@
 
 set -e
 
+OPTIND=1
+count=100
+seed=""    # default to no seed specified
+while getopts "c:S:" opt
+do
+    case "$opt" in
+	c) count="$OPTARG" ;;
+	S) seed="-S $OPTARG" ;;
+    esac
+done
+shift "$((OPTIND-1))"
+
 rm -rf temp
 mkdir -p temp
 echo "generating tests.."
-python3 generate.py
+python3 generate.py -c $count $seed
 
 echo "running tests.."
 for i in $( ls temp/*.ys | sed 's,[^0-9],,g; s,^0*\(.\),\1,g;' ); do
-- 
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