1 files changed, 32 insertions, 0 deletions
diff --git a/src/lib/util/tests/doubles_unittest.cc b/src/lib/util/tests/doubles_unittest.cc
new file mode 100644
index 0000000..1c17f90
--- /dev/null
+++ b/src/lib/util/tests/doubles_unittest.cc
@@ -0,0 +1,32 @@
+// Copyright (C) 2019,2021 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 <util/doubles.h>
+
+#include <gtest/gtest.h>
+
+using namespace std;
+using namespace isc;
+using namespace isc::util;
+
+namespace {
+
+// Exercises isc::util::areDoublesEquivalent().
+TEST(Doubles, areDoublesEquivalent) {
+    std::vector<uint8_t> data;
+
+    // Default tolerance is 0.000001
+    EXPECT_TRUE(areDoublesEquivalent( 1.0000000, 1.0000005));
+    EXPECT_FALSE(areDoublesEquivalent(1.0000000, 1.000005));
+
+    // Check custom tolerance.
+    EXPECT_TRUE(areDoublesEquivalent( 1.000, 1.005, 0.01));
+    EXPECT_FALSE(areDoublesEquivalent(1.000, 1.005, 0.001));
+}
+
+}