Refactor the unit tests.

tests/test-lib.sh

-#!/bin/bash
-
-# Abort on error.
-set -e
-
-PWD=`pwd`
-REPO_URL=file://$PWD/svnrepo
-GIT_CL=$PWD/../git-cl
-
-# Set up an SVN repo that has a few commits to trunk.
-setup_initsvn() {
-  echo "Setting up test SVN repo..."
-  rm -rf svnrepo
-  svnadmin create svnrepo
-
-  rm -rf svn
-  svn co -q $REPO_URL svn
-  (
-    cd svn
-    echo "test" > test
-    svn add -q test
-    svn commit -q -m "initial commit"
-    echo "test2" >> test
-    svn commit -q -m "second commit"
-  )
-}
-
-# Set up a git-svn checkout of the repo.
-setup_gitsvn() {
-  echo "Setting up test git-svn repo..."
-  rm -rf git-svn
-  # There appears to be no way to make git-svn completely shut up, so we
-  # redirect its output.
-  git svn -q clone $REPO_URL git-svn >/dev/null 2>&1
-}
-
-cleanup() {
-  rm -rf svnrepo svn git-svn
-}
-
-# Usage: test_expect_success "description of test" "test code".
-test_expect_success() {
-  echo "TESTING: $1"
-  exit_code=0
-  sh -c "$2" || exit_code=$?
-  if [ $exit_code != 0 ]; then
-    echo "FAILURE: $1"
-    return $exit_code
-  fi
-}