1 files changed, 76 insertions, 0 deletions
diff --git a/deps/v8/test/unittests/numbers/conversions-unittest.cc b/deps/v8/test/unittests/numbers/conversions-unittest.cc
new file mode 100644
index 0000000000..e0c1c55aae
--- /dev/null
+++ b/deps/v8/test/unittests/numbers/conversions-unittest.cc
@@ -0,0 +1,76 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/init/v8.h"
+
+#include "src/numbers/conversions.h"
+#include "test/unittests/test-utils.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+class ConversionsTest : public ::testing::Test {
+ public:
+  ConversionsTest() = default;
+  ~ConversionsTest() override = default;
+
+  SourcePosition toPos(int offset) {
+    return SourcePosition(offset, offset % 10 - 1);
+  }
+};
+
+// Some random offsets, mostly at 'suspicious' bit boundaries.
+
+struct IntStringPair {
+  int integer;
+  std::string string;
+};
+
+static IntStringPair int_pairs[] = {{0, "0"},
+                                    {101, "101"},
+                                    {-1, "-1"},
+                                    {1024, "1024"},
+                                    {200000, "200000"},
+                                    {-1024, "-1024"},
+                                    {-200000, "-200000"},
+                                    {kMinInt, "-2147483648"},
+                                    {kMaxInt, "2147483647"}};
+
+TEST_F(ConversionsTest, IntToCString) {
+  std::unique_ptr<char[]> buf(new char[4096]);
+
+  for (size_t i = 0; i < arraysize(int_pairs); i++) {
+    ASSERT_STREQ(IntToCString(int_pairs[i].integer, {buf.get(), 4096}),
+                 int_pairs[i].string.c_str());
+  }
+}
+
+struct DoubleStringPair {
+  double number;
+  std::string string;
+};
+
+static DoubleStringPair double_pairs[] = {
+    {0.0, "0"},
+    {kMinInt, "-2147483648"},
+    {kMaxInt, "2147483647"},
+    // ES section 7.1.12.1 #sec-tostring-applied-to-the-number-type:
+    // -0.0 is stringified to "0".
+    {-0.0, "0"},
+    {1.1, "1.1"},
+    {0.1, "0.1"}};
+
+TEST_F(ConversionsTest, DoubleToCString) {
+  std::unique_ptr<char[]> buf(new char[4096]);
+
+  for (size_t i = 0; i < arraysize(double_pairs); i++) {
+    ASSERT_STREQ(DoubleToCString(double_pairs[i].number, {buf.get(), 4096}),
+                 double_pairs[i].string.c_str());
+  }
+}
+
+}  // namespace interpreter
+}  // namespace internal
+}  // namespace v8