Add missing theme-compat path check.

[mukeshpanchal27]

Trac ticket:

Followup for #18298 / [56635]

While I was working on another ticket, I came across this issue.

When i run unit test for test_switch_theme using npm run test:php -- --filter test_switch_theme i found that it show me below error. They error comes from the TT4 theme, the tests did not run checks for block theme per this line of code but when we run single unit test current_theme_supports( 'block-templates' ) return false due to some global updates in other unit tests.

Error:

1) Tests_Theme::test_switch_theme
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-''
+'/var/www/src/wp-includes/theme-compat/footer.php'

This PR add the missing theme-compat check similar to locate_template function so it will not failed.

---

This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[felixarntz]

@mukeshpanchal27 Good catch, makes sense to include this as a safety net.

They error comes from the TT4 theme, the tests did not run checks for block theme per this line of code but when we run single unit test current_theme_supports( 'block-templates' ) return false due to some global updates in other unit tests.

This is probably still an issue though, so it would be great to figure out where that global test "pollution" comes from.

[mukeshpanchal27]

Thanks @felixarntz, I have open separate PR 5646 in which we can check the switch_theme behaviour. Meantime could you commit this one?

[felixarntz]

@mukeshpanchal27 I've looked into the problem as well and implemented #5650 as an attempt. Can you try applying that to your site (without this PR here though) and see if that would address the failure with TT4 as well?

[felixarntz]

Closing in favor of https://core.trac.wordpress.org/changeset/57104