text: // Copyright 2018 PDFium 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 "xfa/fgas/layout/cfx_txtbreak.h"
  
  #include <memory>
  #include <utility>
  
  #include "core/fxcrt/fx_bidi.h"
  #include "core/fxge/cfx_font.h"
  #include "testing/gtest/include/gtest/gtest.h"
  #include "testing/test_support.h"
  #include "third_party/base/ptr_util.h"
  #include "xfa/fgas/font/cfgas_fontmgr.h"
  #include "xfa/fgas/font/cfgas_gefont.h"
  
  class CFX_TxtBreakTest : public testing::Test {
   public:
    void SetUp() override {
      font_ =
          CFGAS_GEFont::LoadFont(L"Arial Black", 0, 0, GetGlobalFontManager());
      ASSERT(font_.Get());
    }
  
    std::unique_ptr<CFX_TxtBreak> CreateBreak() {
      auto b = pdfium::MakeUnique<CFX_TxtBreak>();
      b->SetFont(font_);
      return b;
    }
  
   private:
    RetainPtr<CFGAS_GEFont> font_;
  };
  
  TEST_F(CFX_TxtBreakTest, BidiLine) {
    auto txt_break = CreateBreak();
    txt_break->SetLineBreakTolerance(1);
    txt_break->SetFontSize(12);
  
    WideString input = WideString::FromUTF8(ByteStringView("\xa\x0\xa\xa", 4));
    for (auto& ch : input)
      txt_break->AppendChar(ch);
  
    auto chars = txt_break->GetCurrentLineForTesting()->m_LineChars;
    FX_BidiLine(&chars, chars.size());
    EXPECT_EQ(3u, chars.size());
  }
  