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Spread tests

We rely on spread to run full-system test on Ubuntu Core 16. We also provide a utility script (run-spread-test.sh) to launch the spread test. It will

  1. Fetch primary snaps( kernel, core, gadget) and build custom Ubuntu Core image with them
  2. Boot the image in qemu emulator
  3. Deploy test suits in emulation environment
  4. Execute full-system testing

Firstly, install ubuntu-image tool since we need to create a custom Ubuntu Core image during test preparation.

sudo snap install --beta --classic ubuntu-image

Secondly, install qemu-kvm package since we use it as the backend to run the spread test.

sudo apt install qemu-kvm

Meanwhile, you need a classic-mode supported spread binary to launch kvm from its context. You can either build spread from this branch or download the spread snap package here.

sudo snap install --classic --dangerous spread_2017.05.24_amd64.snap

You may build the docker snap locally in advance and then execute the spread tests with the following commands:

snapcraft
./run-spread-tests.sh

When doing a local build, you can also specify --test-from-channel to fetch the snap from the specific channel of the store. The snap from candidate channel is used by default as test target if --channel option is not specified.

./run-spread-tests.sh --test-from-channel --channel=stable

In order to run an individual spread test, please run the following command:

spread spread/main/installation

This will run the test case under spread/main/installation folder. You can specify the SNAP_CHANNEL environment variable to install a snap from a specific channel for the testing as well.

SNAP_CHANNEL=candidate spread spread/main/update_policy