bcquality/microsoft/knowledge/testing/use-testpage-visible-enabled-to-verify-field-ui-state.md
Michael Dieringer db9c0f275a Fix remaining correctness issues from Jesper's 2026-09-15 re-review
- use-generateguid-for-unique-test-fixture-values.md: narrowed the
  collision rule to primary-key/unique-lookup fields - an ordinary
  descriptive field carries no uniqueness constraint, so a hardcoded
  or deterministic value there isn't the anti-pattern (the article and
  its al-testing-review.md worklist cue both said "primary-key or
  descriptive field"). Also corrected GenerateRandomCode: it opens its
  target table as a temporary RecordRef that starts and stays empty,
  so its repeat/until loop always exits after one iteration and never
  retries even within a single test run - the "non-colliding within a
  test run" claim was false. It's the rightmost N characters of
  GenerateGUID()'s sequential series, so a short field's value cycles
  (Code[1] repeats every 10 calls, Code[2] every 100). Verified against
  LibraryUtility.Codeunit.al in the BCApps reference clone.
- item-ledger-entry-document-no-follows-last-shipping-no: both
  fixtures called FindSet() without consuming its optional Boolean,
  which raises a runtime error on an empty result set - the opposite
  of the article's own claimed "silently matches zero rows, no error"
  behavior. Wrapped in `if ... then;` per the existing
  guard-database-reads.good.al idiom.
- al-data-modeling-review.md: widened both not-applicable scope
  clauses (intro and outcome) to include dimension wiring, posting-
  routine structure, and Item Ledger Entry document-number lookups -
  the leaf declared itself not-applicable outside setup/master/key/
  numbering/block/audit surfaces despite having a targeted cue for
  this PR's own new article.
- Converted this PR's 8 plain-backtick "See sample: `x.good.al`."
  references (across all 4 new articles) to the READ-convention
  markdown-link form required by Knowledge-Retrieval.ps1.

Rebased onto upstream/main (one conflict in al-data-modeling-review.md
intro wording, merged).
2026-09-21 22:35:42 +02:00

1.6 KiB

bc-version domain keywords technologies countries application-area
all
testing
testpage
visible
enabled
ui-state
headless-test
field-verification
al
w1
all

Verify field visibility and enabled state with TestPage.Visible()/.Enabled()

Description

A UI test codeunit does not need to inspect table or page properties indirectly to confirm a field is shown or enabled under given conditions. The TestPage object exposes a Visible() and an Enabled() function on each field, reflecting the page's actual rendered state, callable directly from a [Test] procedure. Enabled() and Editable() are distinct states — this article covers visibility/enabled state specifically; see use-testpage-editable-to-verify-field-editability.md for verifying whether a field can actually be changed.

Best Practice

Open the TestPage, navigate to the relevant record if needed, then assert against TestPageField.Visible() and TestPageField.Enabled() to verify the field's shown/enabled state, rather than checking an unrelated table/page property or skipping the check.

See sample: use-testpage-visible-enabled-to-verify-field-ui-state.good.al.

Anti Pattern

A test that opens the TestPage but never asserts against Visible()/Enabled() on the field in question — confirming only that the page opens, not that the field behaves as expected.

See sample: use-testpage-visible-enabled-to-verify-field-ui-state.bad.al.