Implement double/triple click functionality in views textfield.

views/controls/textfield/textfield_views_model_unittest.cc

Index: views/controls/textfield/textfield_views_model_unittest.cc
diff --git a/views/controls/textfield/textfield_views_model_unittest.cc b/views/controls/textfield/textfield_views_model_unittest.cc
index c8580b435d32fd01e48177646e77c324ba44acdf..2aa1e424321ca682abdf4d24c6543085157eed28 100644
--- a/views/controls/textfield/textfield_views_model_unittest.cc
+++ b/views/controls/textfield/textfield_views_model_unittest.cc
@@ -348,4 +348,47 @@ TEST(TextfieldViewsModelTest, MAYBE_Clipboard) {
   EXPECT_EQ(29U, model.cursor_pos());
 }
 
+void SelectWordTestVerifier(TextfieldViewsModel &model,
+    const std::string &expected_selected_string, size_t expected_cursor_pos) {
+  EXPECT_STR_EQ(expected_selected_string, model.GetSelectedText());
+  EXPECT_EQ(expected_cursor_pos, model.cursor_pos());
+}
+
+TEST(TextfieldViewsModelTest, SelectWordTest) {
+  TextfieldViewsModel model;
+  model.Append(ASCIIToUTF16("  HELLO  !!  WO     RLD "));
+
+  // Test when cursor is at the beginning.
+  model.MoveCursorToStart(false);
+  model.SelectWord();
+  SelectWordTestVerifier(model, "  ", 2U);
+
+  // Test when cursor is at the beginning of a word.
+  model.MoveCursorTo(2U, false);
+  model.SelectWord();
+  SelectWordTestVerifier(model, "HELLO", 7U);
+
+  // Test when cursor is at the end of a word.
+  model.MoveCursorTo(15U, false);
+  model.SelectWord();
+  SelectWordTestVerifier(model, "WO", 15U);
+
+  // Test when cursor is somewhere in a non-alph-numeric fragment.
+  for (size_t cursor_pos = 8; cursor_pos < 13U; cursor_pos++) {
+    model.MoveCursorTo(cursor_pos, false);
+    model.SelectWord();
+    SelectWordTestVerifier(model, "  !!  ", 13U);
+  }
+
+  // Test when cursor is somewhere in a whitespace fragment.
+  model.MoveCursorTo(17U, false);
+  model.SelectWord();
+  SelectWordTestVerifier(model, "     ", 20U);
+
+  // Test when cursor is at the end.
+  model.MoveCursorToEnd(false);
+  model.SelectWord();
+  SelectWordTestVerifier(model, " ", 24U);
+}
+
 }  // namespace views