Cover FPDFBookmark_Find() with embedder tests.

fpdfsdk/src/fpdfdoc_embeddertest.cpp

 // Copyright 2015 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 "core/include/fxcrt/fx_string.h"
 #include "public/fpdf_doc.h"
 #include "public/fpdfview.h"
 #include "testing/embedder_test.h"
 #include "testing/fx_string_testhelpers.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 81 matching lines @@
   EXPECT_EQ(nullptr, FPDFBookmark_GetFirstChild(document(), child));
 
   FPDF_BOOKMARK sibling = FPDFBookmark_GetNextSibling(document(), child);
   EXPECT_NE(nullptr, sibling);
   EXPECT_EQ(28, FPDFBookmark_GetTitle(sibling, buf, sizeof(buf)));
   EXPECT_EQ(CFX_WideString(L"A Good Ending"),
             CFX_WideString::FromUTF16LE(buf, 13));
 
   EXPECT_EQ(nullptr, FPDFBookmark_GetNextSibling(document(), sibling));
 }
+
+TEST_F(FPDFDocEmbeddertest, FindBookmarks) {
+  // Open a file with two bookmarks, and extract the first.
+  EXPECT_TRUE(OpenDocument("bookmarks.pdf"));
+
+  unsigned short buf[128];
+  FPDF_BOOKMARK child = FPDFBookmark_GetFirstChild(document(), nullptr);
+  EXPECT_NE(nullptr, child);
+  EXPECT_EQ(34, FPDFBookmark_GetTitle(child, buf, sizeof(buf)));
+  EXPECT_EQ(CFX_WideString(L"A Good Beginning"),
+            CFX_WideString::FromUTF16LE(buf, 16));
+
+  // Find the same one again using the title.
+  EXPECT_EQ(child, FPDFBookmark_Find(document(), buf));
+
+  // Try to find one using a non-existent title.
+  buf[0] = 'X';
+  EXPECT_EQ(nullptr, FPDFBookmark_Find(document(), buf));
+}