Introduce VisibleUnitsWordTest.EndOfWordBasic

This patch introduces |VisibleUnitsWordTest.EndOfWordBasic| unit test
to record current behavior as a preparation of the patch[1].

[1] http://crrev.com/c/737981 Introduce TextOffsetMapping to simplify
word/paragraph selection

Bug: 778507
Change-Id: Ic65a6a646806465c05b1a8fb7d5213beeb71e6e4
Reviewed-on: https://chromium-review.googlesource.com/892761Reviewed-by: Xiaocheng Hu <xiaochengh@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533169}

third_party/WebKit/Source/core/editing/VisibleUnitsWordTest.cpp

@@ -86,6 +86,23 @@ TEST_F(VisibleUnitsWordTest, StartOfWordTextSecurity) {
   EXPECT_EQ("|abc<s>foo bar</s>baz", DoStartOfWord("abc<s>foo bar</s>b|az"));
 }
 
+TEST_F(VisibleUnitsWordTest, EndOfWordBasic) {
+  EXPECT_EQ("<p> (|1) abc def</p>", DoEndOfWord("<p>| (1) abc def</p>"));
+  EXPECT_EQ("<p> (|1) abc def</p>", DoEndOfWord("<p> |(1) abc def</p>"));
+  EXPECT_EQ("<p> (1|) abc def</p>", DoEndOfWord("<p> (|1) abc def</p>"));
+  EXPECT_EQ("<p> (1)| abc def</p>", DoEndOfWord("<p> (1|) abc def</p>"));
+  EXPECT_EQ("<p> (1) |abc def</p>", DoEndOfWord("<p> (1)| abc def</p>"));
+  EXPECT_EQ("<p> (1) abc| def</p>", DoEndOfWord("<p> (1) |abc def</p>"));
+  EXPECT_EQ("<p> (1) abc| def</p>", DoEndOfWord("<p> (1) a|bc def</p>"));
+  EXPECT_EQ("<p> (1) abc| def</p>", DoEndOfWord("<p> (1) ab|c def</p>"));
+  EXPECT_EQ("<p> (1) abc |def</p>", DoEndOfWord("<p> (1) abc| def</p>"));
+  EXPECT_EQ("<p> (1) abc def|</p>", DoEndOfWord("<p> (1) abc |def</p>"));
+  EXPECT_EQ("<p> (1) abc def|</p>", DoEndOfWord("<p> (1) abc d|ef</p>"));
+  EXPECT_EQ("<p> (1) abc def|</p>", DoEndOfWord("<p> (1) abc de|f</p>"));
+  EXPECT_EQ("<p> (1) abc def|</p>", DoEndOfWord("<p> (1) abc def|</p>"));
+  EXPECT_EQ("<p> (1) abc def|</p>", DoEndOfWord("<p> (1) abc def</p>|"));
+}
+
 TEST_F(VisibleUnitsWordTest, EndOfWordTextSecurity) {
   // Note: |EndOfWord()| considers security characters as a sequence "x".
   InsertStyleElement("s {-webkit-text-security:disc;}");