Fix integer truncation in Character test functions

third_party/WebKit/Source/platform/fonts/CharacterTest.cpp

Index: third_party/WebKit/Source/platform/fonts/CharacterTest.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/CharacterTest.cpp b/third_party/WebKit/Source/platform/fonts/CharacterTest.cpp
index 4f0b86256dd6616e6e682f2484ea3b201e1beb16..419561a155687d335c02dddf4a643e3bf56636c3 100644
--- a/third_party/WebKit/Source/platform/fonts/CharacterTest.cpp
+++ b/third_party/WebKit/Source/platform/fonts/CharacterTest.cpp
@@ -386,4 +386,32 @@ TEST(CharacterTest, LineBreakAndQuoteNotEmoji)
     EXPECT_FALSE(Character::isEmojiTextPresentation('"'));
 }
 
+TEST(CharacterTest, Truncation)
+{
+    const UChar32 base = 0x90000;
+    UChar32 testChar = 0;
+
+    testChar = base + spaceCharacter;
+    EXPECT_FALSE(Character::treatAsSpace(testChar));
+    testChar = base + noBreakSpaceCharacter;
+    EXPECT_FALSE(Character::treatAsSpace(testChar));
+
+    testChar = base + zeroWidthNonJoinerCharacter;
+    EXPECT_FALSE(Character::treatAsZeroWidthSpace(testChar));
+    testChar = base + zeroWidthJoinerCharacter;
+    EXPECT_FALSE(Character::treatAsZeroWidthSpace(testChar));
+
+    testChar = base + 0x12;
+    EXPECT_FALSE(Character::treatAsZeroWidthSpaceInComplexScript(testChar));
+    EXPECT_FALSE(Character::treatAsZeroWidthSpaceInComplexScript(testChar));
+    testChar = base + objectReplacementCharacter;
+    EXPECT_FALSE(Character::treatAsZeroWidthSpaceInComplexScript(testChar));
+
+    testChar = base + 0xA;
+    EXPECT_FALSE(Character::isNormalizedCanvasSpaceCharacter(testChar));
+    testChar = base + 0x9;
+    EXPECT_FALSE(Character::isNormalizedCanvasSpaceCharacter(testChar));
+
+}
+
 } // namespace blink