Make custom element name checks faster and fewer

third_party/WebKit/Source/core/dom/custom/CustomElementTest.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/dom/custom/CustomElement.h"
 
 #include "core/HTMLNames.h"
 #include "core/SVGNames.h"
 #include "core/dom/Document.h"
 #include "core/html/HTMLElement.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include <ios>
 #include <memory>
 
 namespace blink {
 
 static void testIsPotentialCustomElementName(const AtomicString& str, bool expected)
 {
     if (expected) {
         EXPECT_TRUE(CustomElement::isValidName(str))
             << str << " should be a valid custom element name.";
     } else {
@@ skipping 70 matching lines @@
         { 0x10000, 0xEFFFF },
     };
     for (auto range : ranges) {
         testIsPotentialCustomElementNameChar(range.from - 1, false);
         for (UChar32 c = range.from; c <= range.to; ++c)
             testIsPotentialCustomElementNameChar(c, true);
         testIsPotentialCustomElementNameChar(range.to + 1, false);
     }
 }
 
+TEST(CustomElementTest, TestIsValidNamePotentialCustomElementName8BitChar)
+{
+    // isPotentialCustomElementName8BitChar must match
+    // isPotentialCustomElementNameChar, so we just test it returns
+    // the same result throughout its range.
+    for (UChar ch = 0x0; ch <= 0xff; ++ch) {
+        EXPECT_EQ(
+            Character::isPotentialCustomElementName8BitChar(ch),
+            Character::isPotentialCustomElementNameChar(ch))
+            << "isPotentialCustomElementName8BitChar must agree with "
+            << "isPotentialCustomElementNameChar: 0x" << std::hex << ch;
+    }
+}
+
 TEST(CustomElementTest, TestIsValidNamePotentialCustomElementNameCharFalse)
 {
     struct {
         UChar32 from, to;
     } ranges[] = {
         { 'A', 'Z' },
     };
     for (auto range : ranges) {
         for (UChar32 c = range.from; c <= range.to; ++c)
             testIsPotentialCustomElementNameChar(c, false);
@@ skipping 65 matching lines @@
         EXPECT_EQ(data.state, element->getCustomElementState()) << data.name;
         EXPECT_EQ(data.v0state, element->getV0CustomElementState()) << data.name;
 
         element = document.createElementNS(SVGNames::svgNamespaceURI, data.name, ASSERT_NO_EXCEPTION);
         EXPECT_EQ(CustomElementState::Uncustomized, element->getCustomElementState()) << data.name;
         EXPECT_EQ(data.v0state, element->getV0CustomElementState()) << data.name;
     }
 }
 
 } // namespace blink