Add tests to exercise FPDF_SaveAsCopy().

testing/embedder_test.h

 // 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.
 
 #ifndef TESTING_EMBEDDER_TEST_H_
 #define TESTING_EMBEDDER_TEST_H_
 
 #include <map>
 #include <string>
 
@@ skipping 40 matching lines @@
 
     // Equivalent to FPDF_FORMFILLINFO::FFI_GetPage().
     virtual FPDF_PAGE GetPage(FPDF_FORMHANDLE form_handle,
                               FPDF_DOCUMENT document,
                               int page_index);
 
    private:
     std::map<int, FPDF_PAGE> m_pageMap;
   };
 
+  struct LoadDocumentData {
+    FPDF_DOCUMENT* document;
+    FPDF_FILEACCESS* file_access;
+    FX_FILEAVAIL* file_avail;
+    FPDF_AVAIL* avail;
+    FX_DOWNLOADHINTS* hints;
+    FPDF_FORMHANDLE* form_handle;
+  };
+
   EmbedderTest();
   virtual ~EmbedderTest();
 
+  static bool LoadDocument(const char* data,
+                           size_t data_size,
+                           bool must_linearize,
+                           TestLoader* loader,
+                           EmbedderTest* embedder_test,
+                           LoadDocumentData* out_data);
+
   void SetUp() override;
   void TearDown() override;
 
 #ifdef PDF_ENABLE_V8
   // Call before SetUp to pass shared isolate, otherwise PDFium creates one.
   void SetExternalIsolate(void* isolate) {
     external_isolate_ = static_cast<v8::Isolate*>(isolate);
   }
 #endif  // PDF_ENABLE_V8
 
@@ skipping 61 matching lines @@
   static int SetTimerTrampoline(FPDF_FORMFILLINFO* info,
                                 int msecs,
                                 TimerCallback fn);
   static void KillTimerTrampoline(FPDF_FORMFILLINFO* info, int id);
   static FPDF_PAGE GetPageTrampoline(FPDF_FORMFILLINFO* info,
                                      FPDF_DOCUMENT document,
                                      int page_index);
 };
 
 #endif  // TESTING_EMBEDDER_TEST_H_