diff -r 000000000000 -r 6474c204b198 testing/release/common/check_updates.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/release/common/check_updates.sh	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,89 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+check_updates () {
+  # called with 4 args - platform, source package, target package, update package
+  update_platform=$1
+  source_package=$2
+  target_package=$3
+  locale=$4
+
+  # cleanup
+  rm -rf source/*
+  rm -rf target/*
+
+  unpack_build $update_platform source "$source_package" $locale
+  if [ "$?" != "0" ]; then
+    echo "FAILED: cannot unpack_build $update_platform source $source_package"
+    return 1
+  fi
+  unpack_build $update_platform target "$target_package" $locale 
+  if [ "$?" != "0" ]; then
+    echo "FAILED: cannot unpack_build $update_platform target $target_package"
+    return 1
+  fi
+  
+  case $update_platform in
+      Darwin_ppc-gcc | Darwin_Universal-gcc3) 
+          platform_dirname="*.app"
+          updater="Contents/MacOS/updater.app/Contents/MacOS/updater"
+          ;;
+      WINNT_x86-msvc) 
+          platform_dirname="bin"
+          updater="updater.exe"
+          ;;
+      Linux_x86-gcc | Linux_x86-gcc3) 
+          platform_dirname=`echo $product | tr '[A-Z]' '[a-z]'`
+          updater="updater"
+          ;;
+  esac
+
+  if [ -f update/update.status ]; then rm update/update.status; fi
+  if [ -f update/update.log ]; then rm update/update.log; fi
+
+  if [ -d source/$platform_dirname ]; then
+    cd source/$platform_dirname;
+    cp $updater ../../update
+    ../../update/updater ../../update 0
+    cd ../..
+  else
+    echo "FAIL: no dir in source/$platform_dirname"
+    return 1
+  fi
+
+  cat update/update.log
+  update_status=`cat update/update.status`
+
+  if [ "$update_status" != "succeeded" ]
+  then
+    echo "FAIL: update status was not succeeded: $update_status"
+    return 1
+  fi
+
+  diff -r source/$platform_dirname target/$platform_dirname  > results.diff
+  diffErr=$?
+  cat results.diff
+  grep '^Binary files' results.diff > /dev/null
+  grepErr=$?
+  if [ $grepErr == 0 ]
+  then
+    echo "FAIL: binary files found in diff"
+    return 1
+  elif [ $grepErr == 1 ]
+  then
+    if [ -s results.diff ]
+    then
+      echo "WARN: non-binary files found in diff"
+      return 2
+    fi
+  else
+    echo "FAIL: unknown error from grep: $grepErr"
+    return 3
+  fi
+  if [ $diffErr != 0 ]
+  then
+    echo "FAIL: unknown error from diff: $diffErr"
+    return 3
+  fi
+}