QA:Testcase Anaconda updates.img via installation source

Description

This test will verify that anaconda can download and apply a updates.img that is inside the remote installation source without extra input from the user. For help preparing updates.img, see Anaconda/Updates

How to test

1. Prepare a local installation source by mirroring an existing online source.
2. Make the installation source accessible over one of the supported network protocols (HTTP, FTP, NFS).
3. Prepare a valid updates.img file. See this page for image creation instructions. A good thing to change in the updates.img is the "What language would you like to use during the installation process?" text in pyanaconda/iw/language_gui.py, as this text is displayed on one of the first screens.
4. Copy the updates.img into the images/ directory of your local installation source
5. Boot the installer using the inst.repo= option at boot directing to the modified installation source where the updates.img was published. See Anaconda/Options for information on supported boot options.
6. Proceed with installation

Expected Results

1. Anaconda prepares the updates.img and copies its content to /tmp/updates/. Any changes you included in the updates.img file are applied
2. Anaconda proceeds without related errors