1 files changed, 64 insertions, 0 deletions
diff --git a/intl/gtest/TestEncoding.cpp b/intl/gtest/TestEncoding.cpp
new file mode 100644
index 0000000000..24ffa24390
--- /dev/null
+++ b/intl/gtest/TestEncoding.cpp
@@ -0,0 +1,64 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+#include "gtest/gtest.h"
+
+#include "mozilla/Encoding.h"
+#include <type_traits>
+
+#define ENCODING_TEST(name) TEST(EncodingTest, name)
+
+using namespace mozilla;
+
+static_assert(std::is_standard_layout<NotNull<const Encoding*>>::value,
+              "NotNull<const Encoding*> must be a standard layout type.");
+
+// These tests mainly test that the C++ interface seems to
+// reach the Rust code. More thorough testing of the back
+// end is done in Rust.
+
+ENCODING_TEST(ForLabel) {
+  nsAutoCString label("  uTf-8   ");
+  ASSERT_EQ(Encoding::ForLabel(label), UTF_8_ENCODING);
+  label.AssignLiteral("   cseucpkdfmTjapanese  ");
+  ASSERT_EQ(Encoding::ForLabel(label), EUC_JP_ENCODING);
+}
+
+ENCODING_TEST(ForBOM) {
+  nsAutoCString data("\xEF\xBB\xBF\x61");
+  const Encoding* encoding;
+  size_t bomLength;
+  std::tie(encoding, bomLength) = Encoding::ForBOM(data);
+  ASSERT_EQ(encoding, UTF_8_ENCODING);
+  ASSERT_EQ(bomLength, 3U);
+  data.AssignLiteral("\xFF\xFE");
+  std::tie(encoding, bomLength) = Encoding::ForBOM(data);
+  ASSERT_EQ(encoding, UTF_16LE_ENCODING);
+  ASSERT_EQ(bomLength, 2U);
+  data.AssignLiteral("\xFE\xFF");
+  std::tie(encoding, bomLength) = Encoding::ForBOM(data);
+  ASSERT_EQ(encoding, UTF_16BE_ENCODING);
+  ASSERT_EQ(bomLength, 2U);
+  data.AssignLiteral("\xEF\xBB");
+  std::tie(encoding, bomLength) = Encoding::ForBOM(data);
+  ASSERT_EQ(encoding, nullptr);
+  ASSERT_EQ(bomLength, 0U);
+}
+
+ENCODING_TEST(Name) {
+  nsAutoCString name;
+  UTF_8_ENCODING->Name(name);
+  ASSERT_TRUE(name.EqualsLiteral("UTF-8"));
+  GBK_ENCODING->Name(name);
+  ASSERT_TRUE(name.EqualsLiteral("GBK"));
+}
+
+ENCODING_TEST(CanEncodeEverything) {
+  ASSERT_TRUE(UTF_8_ENCODING->CanEncodeEverything());
+  ASSERT_FALSE(GB18030_ENCODING->CanEncodeEverything());
+}
+
+ENCODING_TEST(IsAsciiCompatible) {
+  ASSERT_TRUE(UTF_8_ENCODING->IsAsciiCompatible());
+  ASSERT_FALSE(ISO_2022_JP_ENCODING->IsAsciiCompatible());
+}