Make some tests repeatable across platforms.

1 files changed, 7 insertions, 3 deletions

diff --git a/test/make_digest_test.cc b/test/make_digest_test.cc
index 9d37f837..98792e62 100644
--- a/test/make_digest_test.cc
+++ b/test/make_digest_test.cc
@@ -35,6 +35,7 @@
 #include "array_data.h"
 #include "util.h"
 #include <boost/bind.hpp>
+#include <boost/random.hpp>
 #include <boost/test/unit_test.hpp>
 #include <sys/time.h>
 
@@ -49,15 +50,18 @@ void progress (float)
 BOOST_AUTO_TEST_CASE (make_digest_test)
 {
 	/* Make a big file with some random data */
-	srand (1);
+
+	boost::random::mt19937 rng(1);
+	boost::random::uniform_int_distribution<> dist(0, 255);
+
 	int const N = 256 * 1024 * 1024;
 	dcp::ArrayData data (N);
 	auto p = data.data();
 	for (int i = 0; i < N; ++i) {
-		*p++ = rand() & 0xff;
+		*p++ = dist(rng);
 	}
 	data.write ("build/test/random");
 
 	/* Hash it */
-	BOOST_CHECK_EQUAL (dcp::make_digest("build/test/random", boost::bind(&progress, _1)), "GKbk/V3fcRtP5MaPdSmAGNbKkaU=");
+	BOOST_CHECK_EQUAL (dcp::make_digest("build/test/random", boost::bind(&progress, _1)), "HayqPBWBRKqLNgfuo4XSajc+D5s=");
 }