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@trezor/suite-web e2e tests

@trezor/suite-web uses Cypress to run e2e tests. It also uses trezor-user-env which is daily built into a docker image providing all the necessary instrumentation required to run tests (bridge and emulators).

Run it locally

Note: All paths below are relative to the root of trezor-suite repository, if not specified otherwise.

On Linux

Prerequisites

Steps

  1. Run xhost + to add yourself to the X access control list.
  2. Run docker/docker-suite-install.sh.
  3. Run docker/docker-suite-test.sh.
    • A Cypress window should open.
    • Wait until the project is built (a warning about "http://localhost:8000/ is not available", should disappear on the retry button click).
  4. Start a test by clicking its name in the Cypress window.
    • It should open a browser window.
    • If the Suite web app is not loading even after two retries. Stop tests, open a new tab, navigate to http://localhost:8000/, refresh the page until the app is loaded. Close the tab and run tests again.

Troubleshooting

  • Error while fetching server API version: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))
    • On NixOS: Make sure that docker is enabled in your configuration.nix:
      virtualisation.docker.enable = true;
  • Error while fetching server API version: ('Connection aborted.', PermissionError(13, 'Permission denied')) - Check the docker.sock permissions:
    sudo chmod 666 /var/run/docker.sock

On MacOS (Intel)

Prerequisites

Steps

  1. Run XQuartz. Wait till it is launched. Leave it running in the background.
  2. In XQuartz settings go to Preferences -> Security and enable "Allow connections from network clients".
  3. Open a new terminal window (not in XQuartz) and add yourself to the X access control list:
    • xhost +127.0.0.1
    • You will probably need to logout/login after XQuartz installation to have xhost command available.
  4. Run Docker and go to Preferences -> Resources -> Advanced and increase RAM to at least 4GB. Otherwise, the app during tests does not even load.
  5. In terminal window run docker/docker-suite-install.sh
  6. In the terminal window, set two environment variables:
    • export HOSTNAME=`hostname`
    • export DISPLAY=${HOSTNAME}:0
  7. In terminal window run docker/docker-suite-test.sh
    • A Cypress window should open.
    • Wait until the project is built (a warning about "http://localhost:8000/ is not available", should disappear on the retry button click).
  8. Start a test by clicking its name in the Cypress window.
    • It should open a browser window.
    • If the Suite web app is not loading even after two retries. Stop tests, open a new tab, navigate to http://localhost:8000/, refresh the page until the app is loaded. Close the tab and run tests again.

Troubleshooting

  • [...ERROR:browser_main_loop.cc(1434)] Unable to open X display.
    • Make sure the XQuartz app is launched and you can see its terminal.
    • Check that environment variables are properly set:
      • echo $HOSTNAME # e.g. name.local
      • echo $DISPLAY # e.g. name.local:0
    • Do not mix native terminal window with terminal window in your IDE (e.g. Visual Studio Code).

On MacOS (ARM)

  • currently, it is not possible to run E2E tests only within a Docker container on ARM mac. With Trezor-user-env run in Docker, it is possible to run Suite and Cypress locally.

Prerequisites

Steps:

  1. Run XQuartz. Wait till it is launched. Leave it running in the background.
  2. In XQuartz settings go to Preferences -> Security and enable "Allow connections from network clients".
  3. Open a new terminal window (not in XQuartz) and add yourself to the X access control list:
    • xhost +127.0.0.1
    • You will probably need to logout/login after XQuartz installation to have xhost command available.
  4. Run Docker and go to Preferences -> Resources -> Advanced and increase RAM to at least 4GB. Otherwise, the app during tests does not even load.
  5. In the terminal window, set two environment variables:
    • export HOSTNAME=`hostname`
    • export DISPLAY=${HOSTNAME}:0
  6. In terminal window, navigate to trezor-user-env repo root and run ./run.sh.
  7. In another window, run web Suite with yarn suite:dev.
  8. In a third window, run npx cypress open --project packages/suite-web/e2e --config 'baseUrl=http://localhost:8000'.

Troubleshooting

  • Cypress could not verify that this server is running ...
    • make sure that the localhost is actually running and is accessible via browser
  • tests fail at the very beginning on screen with "Use trezor here" button
    • make sure that no other instance of Suite or trezord is running

Notes

Image snapshots

It is possible to run tests with image snapshots to test for visual regressions. To enable snapshots, use env variable:

CYPRESS_SNAPSHOT=1 docker/docker-suite-test.sh

When you need to update image snapshots you have 2 options:

  • use CI job. This will generate new snapshots in artifacts together with a handy script that updates your snapshots locally. Check the log output.
  • use docker/docker-suite-snapshots.sh. This does the same as docker/docker-suite-test.sh, the only difference is it won't fail on non-matching snapshots but generate new snapshots.

run_tests script

The run_tests.js script is the entry point for e2e tests. It:

  • picks tests files to be run (see @tags)
  • retries tests if needed (see @retry)
  • reports tests results

tags

Each test should be assigned a tag at the top of the test file. These allow you to add more fine-grained control in run_tests.js.

At the moment, there are the following tags:

  • @group:[string]
  • @retry=[number]

@group

Assigning a @group allows run_tests.js script to sort the test files into groups and run them in parallel on CI. At the moment these groups exist:

  • @group:metadata
  • @group:device-management
  • @group:suite
  • @group:onboarding
  • @group:settings

@retry

If there is a test that you for any reason need to retry if it fails you may provide @retry=2 tag. In this case, test will be run 3 times in total and count as failed only if all runs fail.

Results

There is a tool to track tests runs and their results, temporarily hosted here https://track-suite.herokuapp.com/ Repo here: https://github.com/mroz22/track-suite