AU: tolerate files that are symlinks in src image, yet not in new image.

delta_performer_unittest.cc

 // Copyright (c) 2009 The Chromium OS 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 <sys/mount.h>
 #include <inttypes.h>
 
 #include <algorithm>
 #include <string>
 #include <vector>
@@ skipping 20 matching lines @@
 using std::min;
 using std::string;
 using std::vector;
 using testing::_;
 using testing::Return;
 
 extern const char* kUnittestPrivateKeyPath;
 extern const char* kUnittestPublicKeyPath;
 
 namespace {
-  const size_t kBlockSize = 4096;
+const size_t kBlockSize = 4096;
 }  // namespace {}
 
 
 class DeltaPerformerTest : public ::testing::Test { };
 
 TEST(DeltaPerformerTest, ExtentsToByteStringTest) {
   uint64_t test[] = {1, 1, 4, 2, kSparseHole, 1, 0, 1};
   COMPILE_ASSERT(arraysize(test) % 2 == 0, array_size_uneven);
   const uint64_t block_size = 4096;
   const uint64_t file_length = 5 * block_size - 13;
@@ skipping 197 matching lines @@
                                      b_mnt.c_str()).c_str()));
     EXPECT_EQ(0, system(StringPrintf("echo foo > %s/foo",
                                      b_mnt.c_str()).c_str()));
     EXPECT_EQ(0, system(StringPrintf("touch %s/emptyfile",
                                      b_mnt.c_str()).c_str()));
     EXPECT_TRUE(WriteSparseFile(StringPrintf("%s/fullsparse", b_mnt.c_str()),
                                 1024 * 1024));
     EXPECT_EQ(0, system(StringPrintf("dd if=/dev/zero of=%s/partsparese bs=1 "
                                      "seek=4096 count=1",
                                      b_mnt.c_str()).c_str()));
+    EXPECT_EQ(0, system(StringPrintf("cp %s/srchardlink0 %s/tmp && "
+                                     "mv %s/tmp %s/srchardlink1",
+                                     b_mnt.c_str(), b_mnt.c_str(),
+                                     b_mnt.c_str(), b_mnt.c_str()).c_str()));
     EXPECT_TRUE(utils::WriteFile(StringPrintf("%s/hardtocompress",
                                               b_mnt.c_str()).c_str(),
                                  reinterpret_cast<const char*>(kRandomString),
                                  sizeof(kRandomString)));
   }
 
   string old_kernel;
   EXPECT_TRUE(utils::MakeTempFile("/tmp/old_kernel.XXXXXX", &old_kernel, NULL));
   ScopedPathUnlinker old_kernel_unlinker(old_kernel);
 
@@ skipping 257 matching lines @@
   op.clear_src_extents();
   *(op.add_src_extents()) = ExtentForRange(5, 3);
   EXPECT_TRUE(DeltaPerformer::IsIdempotentOperation(op));
   *(op.add_dst_extents()) = ExtentForRange(20, 6);
   EXPECT_TRUE(DeltaPerformer::IsIdempotentOperation(op));
   *(op.add_src_extents()) = ExtentForRange(19, 2);
   EXPECT_FALSE(DeltaPerformer::IsIdempotentOperation(op));
 }
 
 }  // namespace chromeos_update_engine