Linux: print page to file rather than using shared memory to send it to the b...

printing/pdf_ps_metafile_linux_unittest.cc

 // Copyright (c) 2009 The Chromium 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 "printing/pdf_ps_metafile_linux.h"
 
+#include <fcntl.h>
 #include <string>
 #include <vector>
 
+#include "base/file_descriptor_posix.h"
 #include "base/file_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 typedef struct _cairo cairo_t;
 
-TEST(PdfTest, ThreePages) {
+class PdfPsTest : public testing::Test {
+ protected:
+  base::FileDescriptor DevNullFD() {
+    return base::FileDescriptor(open("/dev/null", O_WRONLY), true);
+  }
+};
+
+TEST_F(PdfPsTest, Pdf) {
   // Tests in-renderer constructor.
   printing::PdfPsMetafile pdf(printing::PdfPsMetafile::PDF);
   EXPECT_TRUE(pdf.Init());
 
   // Renders page 1.
   cairo_t* context = pdf.StartPage(72, 72);
   EXPECT_TRUE(context != NULL);
   // In theory, we should use Cairo to draw something on |context|.
   EXPECT_TRUE(pdf.FinishPage(1.5));
 
@@ skipping 20 matching lines @@
 
   // Tries to get the first 4 characters from pdf2.
   std::vector<char> buffer2(4, 0x00);
   pdf2.GetData(&buffer2.front(), 4);
 
   // Tests if the header begins with "%PDF".
   std::string header(&buffer2.front(), 4);
   EXPECT_EQ(header.find("%PDF", 0), 0u);
 
   // Tests if we can save data.
-  EXPECT_TRUE(pdf.SaveTo(FilePath("/dev/null")));
+  EXPECT_TRUE(pdf.SaveTo(DevNullFD()));
 }
 
-TEST(PsTest, TwoPages) {
+TEST_F(PdfPsTest, Ps) {
   // Tests in-renderer constructor.
   printing::PdfPsMetafile ps(printing::PdfPsMetafile::PS);
   EXPECT_TRUE(ps.Init());
 
   // Renders page 1.
   cairo_t* context = ps.StartPage(72, 72);
   EXPECT_TRUE(context != NULL);
   // In theory, we should use Cairo to draw something on |context|.
   EXPECT_TRUE(ps.FinishPage(1.5));
 
@@ skipping 20 matching lines @@
 
   // Tries to get the first 4 characters from ps2.
   std::vector<char> buffer2(4, 0x00);
   ps2.GetData(&buffer2.front(), 4);
 
   // Tests if the header begins with "%!PS".
   std::string header(&buffer2.front(), 4);
   EXPECT_EQ(header.find("%!PS", 0), 0u);
 
   // Tests if we can save data.
-  EXPECT_TRUE(ps.SaveTo(FilePath("/dev/null")));
+  EXPECT_TRUE(ps.SaveTo(DevNullFD()));
 }