1 files changed, 34 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestTextFormatter.cpp b/xpcom/tests/gtest/TestTextFormatter.cpp
new file mode 100644
index 000000000..c98b766cc
--- /dev/null
+++ b/xpcom/tests/gtest/TestTextFormatter.cpp
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsTextFormatter.h"
+#include "nsString.h"
+#include "gtest/gtest.h"
+
+TEST(TextFormatter, Tests)
+{
+  nsAutoString fmt(NS_LITERAL_STRING("%3$s %4$S %1$d %2$d %2$d %3$s"));
+  char utf8[] = "Hello";
+  char16_t ucs2[]={'W', 'o', 'r', 'l', 'd', 0x4e00, 0xAc00, 0xFF45, 0x0103, 0x00};
+  int d=3;
+
+  char16_t buf[256];
+  nsTextFormatter::snprintf(buf, 256, fmt.get(), d, 333, utf8, ucs2);
+  nsAutoString out(buf);
+  ASSERT_STREQ("Hello World", NS_LossyConvertUTF16toASCII(out).get());
+
+  const char16_t *uout = out.get();
+  const char16_t expected[] = {0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x20,
+                                0x57, 0x6F, 0x72, 0x6C, 0x64, 0x4E00,
+                                0xAC00, 0xFF45, 0x0103, 0x20, 0x33,
+                                0x20, 0x33, 0x33, 0x33, 0x20, 0x33,
+                                0x33, 0x33, 0x20, 0x48, 0x65, 0x6C,
+                                0x6C, 0x6F};
+
+  for (uint32_t i=0; i<out.Length(); i++) {
+    ASSERT_EQ(uout[i], expected[i]);
+  }
+}
+