AU: Extent writer utility classes

src/platform/update_engine/test_utils.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 "update_engine/test_utils.h"
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ skipping 147 matching lines @@
   EXPECT_TRUE(feof(find_dev_cmd));
   fclose(find_dev_cmd);
 
   // strip trailing \n on dev
   if (*ret.rbegin() == '\n')
     ret.resize(ret.size() - 1);
 
   return ret;
 }
 
-bool ExpectVectorsEq(const vector<char>& a, const vector<char>& b) {
-  EXPECT_EQ(a.size(), b.size());
-  if (a.size() != b.size())
+bool ExpectVectorsEq(const vector<char>& expected, const vector<char>& actual) {
+  EXPECT_EQ(expected.size(), actual.size());
+  if (expected.size() != actual.size())
     return false;
-  for (unsigned int i = 0; i < a.size(); i++) {
-    EXPECT_EQ(a[i], b[i]) << "offset: " << i;
+  for (unsigned int i = 0; i < expected.size(); i++) {
+    EXPECT_EQ(expected[i], actual[i]) << "offset: " << i;
   }
   return true;
 }
 
+void FillWithData(vector<char>* buffer) {
+  size_t input_counter = 0;
+  for (vector<char>::iterator it = buffer->begin(); it != buffer->end(); ++it) {
+    *it = kRandomString[input_counter];
+    input_counter++;
+    input_counter %= sizeof(kRandomString);
+  }
+}
+
 void CreateExtImageAtPath(const string& path, vector<string>* out_paths) {
   // create 10MiB sparse file
   EXPECT_EQ(0, System(StringPrintf("dd if=/dev/zero of=%s"
                                    " seek=10485759 bs=1 count=1",
                                    path.c_str())));
   EXPECT_EQ(0, System(StringPrintf("mkfs.ext3 -F %s", path.c_str())));
   EXPECT_EQ(0, System(StringPrintf("mkdir -p %s", kMountPath)));
   EXPECT_EQ(0, System(StringPrintf("mount -o loop %s %s", path.c_str(),
                                    kMountPath)));
   EXPECT_EQ(0, System(StringPrintf("echo hi > %s/hi", kMountPath)));
@@ skipping 66 matching lines @@
   EXPECT_TRUE(expected_paths.empty());
   if (!expected_paths.empty()) {
     for (set<string>::const_iterator it = expected_paths.begin();
          it != expected_paths.end(); ++it) {
       LOG(INFO) << "extra path: " << *it;
     }
   }
 }
 
 }  // namespace chromeos_update_engine