Top-level domain-based default encoding

third_party/WebKit/Source/core/loader/TextResourceDecoderBuilderTest.cpp

+// Copyright 2016 The Chromium 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 "core/loader/TextResourceDecoderBuilder.h"
+
+#include "core/testing/DummyPageHolder.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+static const WTF::TextEncoding defaultEncodingForURL(const char* url)
+{
+    OwnPtr<DummyPageHolder> pageHolder = DummyPageHolder::create(IntSize(0, 0));
+    Document& document = pageHolder->document();
+    document.setURL(KURL(KURL(), url));
+    TextResourceDecoderBuilder decoderBuilder("text/html", nullAtom);
+    return decoderBuilder.buildFor(&document)->encoding();
+}
+
+TEST(TextResourceDecoderBuilderTest, defaultEncodingComesFromTopLevelDomain)
+{
+    EXPECT_EQ(WTF::TextEncoding("Shift_JIS"), defaultEncodingForURL("http://tsubotaa.la.coocan.jp"));
+    EXPECT_EQ(WTF::TextEncoding("windows-1251"), defaultEncodingForURL("http://udarenieru.ru/index.php"));
+}
+
+TEST(TextResourceDecoderBuilderTest, NoCountryDomainURLDefaultsToLatin1Encoding)
+{
+    // Latin1 encoding is set in |TextResourceDecoder::defaultEncoding()|.
+    EXPECT_EQ(WTF::Latin1Encoding(), defaultEncodingForURL("http://arstechnica.com/about-us"));
+}
+
+} // namespace blink