Unit tests for HarfBuzzShaper

Source/platform/fonts/shaping/HarfBuzzShaper.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 32 matching lines @@
 #include "wtf/unicode/CharacterNames.h"
 
 #include <unicode/uscript.h>
 
 namespace blink {
 
 class Font;
 class GlyphBuffer;
 class SimpleFontData;
 
-class HarfBuzzShaper final : public Shaper {
+class PLATFORM_EXPORT HarfBuzzShaper final : public Shaper {
 public:
     HarfBuzzShaper(const Font*, const TextRun&, const GlyphData* emphasisData = nullptr,
         HashSet<const SimpleFontData*>* fallbackFonts = nullptr, FloatRect* = nullptr);
 
     void setDrawRange(int from, int to);
     bool shape(GlyphBuffer* = 0);
     float totalWidth() { return m_totalWidth; }
     int offsetForPosition(float targetX);
     FloatRect selectionRect(const FloatPoint&, int height, int from, int to);
 
+    unsigned numberOfRunsForTesting() const
+    {
+        return m_harfBuzzRuns.size();
+    }
+
+    bool runInfoForTesting(unsigned runIndex, unsigned& startIndex,
+        unsigned& numGlyphs, hb_script_t& script)
+    {
+        if (runIndex < m_harfBuzzRuns.size()) {
+            startIndex = m_harfBuzzRuns[runIndex]->startIndex();
+            numGlyphs = m_harfBuzzRuns[runIndex]->numGlyphs();
+            script = m_harfBuzzRuns[runIndex]->script();
+            return true;
+        }
+        return false;
+    }
+
 private:
     class HarfBuzzRun {
     public:
         HarfBuzzRun(const HarfBuzzRun&);
         ~HarfBuzzRun();
 
         static PassOwnPtr<HarfBuzzRun> create(const SimpleFontData* fontData, unsigned startIndex, unsigned numCharacters, hb_direction_t direction, hb_script_t script)
         {
             return adoptPtr(new HarfBuzzRun(fontData, startIndex, numCharacters, direction, script));
         }
@@ skipping 70 matching lines @@
     int m_toIndex;
 
     float m_totalWidth;
 
     friend struct CachedShapingResults;
 };
 
 } // namespace blink
 
 #endif // HarfBuzzShaper_h