Add webkit unit test case for ComputeTextQuads

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

 // Copyright 2015 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/editing/VisibleUnits.h"
 
 #include <ostream>  // NOLINT
 #include "bindings/core/v8/V8BindingForTesting.h"
 #include "core/dom/Text.h"
 #include "core/editing/EditingTestBase.h"
@@ skipping 1962 matching lines @@
 TEST_F(VisibleUnitsTest,
        canonicalizationWithCollapsedSpaceAndIsolatedCombiningCharacter) {
   SetBodyContent("<p>  &#x20E3;</p>");  // Leading space is necessary
 
   Node* paragraph = GetDocument().QuerySelector("p");
   Node* text = paragraph->firstChild();
   Position start = CanonicalPositionOf(Position::BeforeNode(paragraph));
   EXPECT_EQ(Position(text, 2), start);
 }
 
+TEST_F(VisibleUnitsTest, computeTextQuadDOM) {
+  const char* bodyContent =
+      "<style> font-family: Ahem; </style>"

[Xiaocheng, 2017/05/17 18:46:39]

This is not correct CSS. There should be a selector:

<style>p {font-family: Ahem}</style>

Could you try again with this fixed?

+      "<p id='host'>00"
+      "<b id='one'>11111</b>"
+      "<b id='two'>22</b>"
+      "<b id='three'>33</b>"
+      "</p>";
+  SetBodyContent(bodyContent);
+
+  const Position start_position(GetDocument().getElementById("host"), 0);
+  const Position mid_position(GetDocument().getElementById("two"), 0);
+  const Position end_position(GetDocument().getElementById("three"), 0);
+  const EphemeralRange range_start_to_two(start_position, mid_position);
+  const EphemeralRange range_start_to_three(start_position, end_position);
+  Vector<FloatQuad> quads_start_to_two;
+  Vector<FloatQuad> quads_start_to_three;
+  quads_start_to_two.AppendVector(ComputeTextQuads(range_start_to_two));
+  quads_start_to_three.AppendVector(ComputeTextQuads(range_start_to_three));
+
+  EXPECT_EQ(2u, quads_start_to_two.size());
+  EXPECT_EQ(3u, quads_start_to_three.size());
+  EXPECT_EQ(quads_start_to_three[0], quads_start_to_two[0]);
+  EXPECT_EQ(quads_start_to_three[1], quads_start_to_two[1]);
+  EXPECT_EQ("8,8; 10,8; 10,9; 8,9", quads_start_to_two[0].ToString());
+  EXPECT_EQ("10,8; 15,8; 15,9; 10,9", quads_start_to_two[1].ToString());
+  EXPECT_EQ("8,8; 10,8; 10,9; 8,9", quads_start_to_three[0].ToString());
+  EXPECT_EQ("10,8; 15,8; 15,9; 10,9", quads_start_to_three[1].ToString());
+  EXPECT_EQ("15,8; 17,8; 17,9; 15,9", quads_start_to_three[2].ToString());
+}
+
 }  // namespace blink