Add test for git-svn with submodule/merge layout.

tests/submodule-merge-test.sh

+#!/bin/bash
+
+# Copyright (c) 2012 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.
+
+set -e
+
+. ./test-lib.sh
+
+setup_initsvn
+setup_gitsvn_submodule
+
+(
+  set -e
+  prev_svn_revision=`svn info file://$PWD/svnrepo | grep ^Revision | \
+      sed s/^.*:// | xargs`
+  cd git-svn-submodule
+  git config rietveld.server localhost:1
+  git checkout -q --track -b work
+  echo "some work done" >> test
+  git add test; git commit -q -m "work \
+TBR=foo"
+
+  git_diff=`git diff HEAD^ | sed -n '/^@@/,$p' | xargs`
+
+  test_expect_success "dcommitted code" \
+      "$GIT_CL dcommit -f --bypass-hooks -m 'dcommit'"
+
+  cd ..
+
+  next_svn_revision=`svn info file://$PWD/svnrepo | grep ^Revision | \
+      sed s/^.*:// | xargs`
+
+  test_expect_success "svn got new revision" \
+      "test $next_svn_revision = `expr $prev_svn_revision + 1`"
+
+  svn_diff=`svn diff -c $next_svn_revision file://$PWD/svnrepo | \
+      sed -n '/^@@/,$p' | xargs`
+
+  test_expect_success "svn diff is correct" \
+      "test \"$git_diff\" = \"$svn_diff\""
+
+  cd git-svn-submodule
+  git svn fetch
+  last_svn_rev=`git show refs/remotes/trunk | grep git-svn-id: | \
+      grep -o trunk@[0-9]* | xargs`
+
+  test_expect_success "git svn fetch gets new svn revision" \
+      "test $last_svn_rev = trunk@$next_svn_revision"
+)
+SUCCESS=$?
+
+#cleanup
+
+if [ $SUCCESS == 0 ]; then
+  echo PASS
+fi