test-app

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sed -n '<from>,<to>p' SKILL.md one section rather than reading the file; ./mxcli syntax <topic> answers how do I write this for a fraction of either.

Test App Skill

This skill guides you through verifying a running Mendix application using playwright-cli for browser automation and mxcli oql for data assertions.

When to Use This Skill

Use this when:

• The user asks to test, verify, or validate a running Mendix app in the browser
• The user wants to confirm that generated pages and widgets actually render
• The user asks for end-to-end or integration tests involving the UI
• The user wants to verify that data is persisted correctly after UI interactions
• You have generated MDL that creates pages and want to close the feedback loop

For microflow logic testing (business rules, calculations, entity operations — no browser needed), use the test-microflows skill and mxcli test instead.

Start Here: mxcli playwright check (one call, text, no screenshot)

"Does the page render?", "is there an error?", "did the list get rows?" are answered by one command against the running app — not by a playwright-cli session:

mxcli playwright check /p/customers /p/orders -p app.mpr

page /p/customers  title="Customers"  h="Customer overview"  rows=12  text=812  console-errors=0
page /p/orders  title="Orders"  text=254  console-errors=1
  ALERT  An error occurred, please contact your system administrator.
  ERR    [Client] An error occurred while executing microflow data source for widget …
  HTTP   560 POST /xas/
  FAIL   1 error banner(s)
  FAIL   1 console error(s)
  FAIL   1 failed request(s)
FAIL 1 of 2 page(s)