1 files changed, 68 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testToSignedOrUnsignedInteger.cpp b/js/src/jsapi-tests/testToSignedOrUnsignedInteger.cpp
new file mode 100644
index 0000000000..6fc82a9445
--- /dev/null
+++ b/js/src/jsapi-tests/testToSignedOrUnsignedInteger.cpp
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ */
+/* 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 <math.h>
+
+#include "js/Conversions.h"
+
+#include "jsapi-tests/tests.h"
+
+using JS::ToSignedInteger;
+using JS::ToUnsignedInteger;
+
+BEGIN_TEST(testToUint8TwiceUint8Range) {
+  double d = -256;
+  uint8_t expected = 0;
+  do {
+    CHECK(ToUnsignedInteger<uint8_t>(d) == expected);
+
+    d++;
+    expected++;
+  } while (d <= 256);
+  return true;
+}
+END_TEST(testToUint8TwiceUint8Range)
+
+BEGIN_TEST(testToInt8) {
+  double d = -128;
+  int8_t expected = -128;
+  do {
+    CHECK(ToSignedInteger<int8_t>(d) == expected);
+
+    d++;
+    expected++;
+  } while (expected < 127);
+  return true;
+}
+END_TEST(testToInt8)
+
+BEGIN_TEST(testToUint32Large) {
+  CHECK(ToUnsignedInteger<uint32_t>(pow(2.0, 83)) == 0);
+  CHECK(ToUnsignedInteger<uint32_t>(pow(2.0, 83) + pow(2.0, 31)) == (1U << 31));
+  CHECK(ToUnsignedInteger<uint32_t>(pow(2.0, 83) + 2 * pow(2.0, 31)) == 0);
+  CHECK(ToUnsignedInteger<uint32_t>(pow(2.0, 83) + 3 * pow(2.0, 31)) ==
+        (1U << 31));
+  CHECK(ToUnsignedInteger<uint32_t>(pow(2.0, 84)) == 0);
+  CHECK(ToUnsignedInteger<uint32_t>(pow(2.0, 84) + pow(2.0, 31)) == 0);
+  CHECK(ToUnsignedInteger<uint32_t>(pow(2.0, 84) + pow(2.0, 32)) == 0);
+  return true;
+}
+END_TEST(testToUint32Large)
+
+BEGIN_TEST(testToUint64Large) {
+  CHECK(ToUnsignedInteger<uint64_t>(pow(2.0, 115)) == 0);
+  CHECK(ToUnsignedInteger<uint64_t>(pow(2.0, 115) + pow(2.0, 63)) ==
+        (1ULL << 63));
+  CHECK(ToUnsignedInteger<uint64_t>(pow(2.0, 115) + 2 * pow(2.0, 63)) == 0);
+  CHECK(ToUnsignedInteger<uint64_t>(pow(2.0, 115) + 3 * pow(2.0, 63)) ==
+        (1ULL << 63));
+  CHECK(ToUnsignedInteger<uint64_t>(pow(2.0, 116)) == 0);
+  CHECK(ToUnsignedInteger<uint64_t>(pow(2.0, 116) + pow(2.0, 63)) == 0);
+  CHECK(ToUnsignedInteger<uint64_t>(pow(2.0, 116) + pow(2.0, 64)) == 0);
+  return true;
+}
+END_TEST(testToUint64Large)