1 files changed, 50 insertions, 0 deletions
diff --git a/src/lib/util/tests/range_utilities_unittest.cc b/src/lib/util/tests/range_utilities_unittest.cc
new file mode 100644
index 0000000..ce94a38
--- /dev/null
+++ b/src/lib/util/tests/range_utilities_unittest.cc
@@ -0,0 +1,50 @@
+// Copyright (C) 2010-2015 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <gtest/gtest.h>
+#include <vector>
+
+#include <util/range_utilities.h>
+
+using namespace std;
+using namespace isc::util;
+
+TEST(RangeUtilitiesTest, isZero) {
+
+    vector<uint8_t> vec(32,0);
+
+    EXPECT_TRUE(isRangeZero(vec.begin(), vec.end()));
+
+    EXPECT_TRUE(isRangeZero(vec.begin(), vec.begin()+1));
+
+    vec[5] = 1;
+    EXPECT_TRUE(isRangeZero(vec.begin(), vec.begin()+5));
+    EXPECT_FALSE(isRangeZero(vec.begin(), vec.begin()+6));
+}
+
+TEST(RangeUtilitiesTest, randomFill) {
+
+    srandom(time(NULL));
+
+    vector<uint8_t> vec1(16,0);
+    vector<uint8_t> vec2(16,0);
+
+    // Testing if returned value is actually random is extraordinary difficult.
+    // Let's just generate bunch of vectors and see if we get the same
+    // value. If we manage to do that in 100 tries, pseudo-random generator
+    // really sucks.
+    fillRandom(vec1.begin(), vec1.end());
+    for (int i=0; i<100; i++) {
+        fillRandom(vec2.begin(), vec2.end());
+        if (vec1 == vec2)
+            FAIL();
+    }
+
+}