// Copyright 2016 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 <memory>
#include <string>

#include "public/fpdf_edit.h"
#include "public/fpdfview.h"
#include "testing/embedder_test.h"
#include "testing/gmock/include/gmock/gmock-matchers.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/test_support.h"

class FPDFEditEmbeddertest : public EmbedderTest, public TestSaver {};

namespace {
const char kExpectedPDF[] =
    "%PDF-1.7\r\n"
    "%\xA1\xB3\xC5\xD7\r\n"
    "1 0 obj\r\n"
    "<</Pages 2 0 R /Type/Catalog>>\r\n"
    "endobj\r\n"
    "2 0 obj\r\n"
    "<</Count 1/Kids\\[ 4 0 R \\]/Type/Pages>>\r\n"
    "endobj\r\n"
    "3 0 obj\r\n"
    "<</CreationDate\\(D:.*\\)/Creator\\(PDFium\\)>>\r\n"
    "endobj\r\n"
    "4 0 obj\r\n"
    "<</Contents 5 0 R /MediaBox\\[ 0 0 640 480\\]"
    "/Parent 2 0 R /Resources<<>>/Rotate 0/Type/Page"
    ">>\r\n"
    "endobj\r\n"
    "5 0 obj\r\n"
    "<</Filter/FlateDecode/Length 8>>stream\r\n"
    // Character '_' is matching '\0' (see comment below).
    "x\x9C\x3____\x1\r\n"
    "endstream\r\n"
    "endobj\r\n"
    "xref\r\n"
    "0 6\r\n"
    "0000000000 65535 f\r\n"
    "0000000017 00000 n\r\n"
    "0000000066 00000 n\r\n"
    "0000000122 00000 n\r\n"
    "0000000192 00000 n\r\n"
    "0000000301 00000 n\r\n"
    "trailer\r\n"
    "<<\r\n"
    "/Root 1 0 R\r\n"
    "/Info 3 0 R\r\n"
    "/Size 6/ID\\[<.*><.*>\\]>>\r\n"
    "startxref\r\n"
    "379\r\n"
    "%%EOF\r\n";
}  // namespace

TEST_F(FPDFEditEmbeddertest, EmptyCreation) {
  EXPECT_TRUE(CreateEmptyDocument());
  FPDF_PAGE page = FPDFPage_New(document(), 0, 640.0, 480.0);
  EXPECT_NE(nullptr, page);
  EXPECT_TRUE(FPDFPage_GenerateContent(page));
  EXPECT_TRUE(FPDF_SaveAsCopy(document(), this, 0));

  // The MatchesRegexp doesn't support embedded NUL ('\0') characters. They are
  // replaced by '_' for the purpose of the test.
  std::string result = GetString();
  std::replace(result.begin(), result.end(), '\0', '_');
  EXPECT_THAT(result, testing::MatchesRegex(
                          std::string(kExpectedPDF, sizeof(kExpectedPDF))));
  FPDF_ClosePage(page);
}