The test steps are:
1. Start a container and touch a file under /tmp
2. Use diff to check the container
3. commit the change into a new image
4. Use diff to check the image
Signed-off-by: Yiqiao Pu <ypu@redhat.com>
Closes: #643
Approved by: mheon
Migrate the diff, exec, export, and history bats tests to
the ginkgo test suite.
Signed-off-by: baude <bbaude@redhat.com>
Closes: #287
Approved by: baude