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theme.json: Fix theme_has_support() #30479

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@ockham ockham commented Apr 2, 2021

Description

Fixes #30478. See there for details.

How has this been tested?

Read the explanation in #30478. Then, have a look at #30045, and verify that its unit tests are currently failing.
Check out #30045's branch (update/wp-env-tt1-blocks-0-4-4), and run

npm run test-unit-php -- /var/www/html/wp-content/plugins/gutenberg/phpunit/class-block-templates-test.php

It should fail.

Now cherry-pick the commits from this branch. Restart wp-env (in order to trigger the upgrade to TT1 Blocks v0.4.5), and run the test again.

This time, it should pass.

Maybe @Addison-Stavlo @david-szabo97 et al can come up with a simpler way to demonstrate this -- I'm not sure where (e.g. in the UI) the template part area is currently exposed (and broken by the underlying bug).

TODO

Note that if you run all PHP unit tests (npm run test-unit-php) after cherry-picking, there's another test failure:

1) WP_Theme_JSON_Resolver_Test::test_translations_are_applied
Failed asserting that Array &0 (
    'palette' => Array &1 (
        0 => Array &2 (
            'slug' => 'light'
            'name' => 'Jasny'
            'color' => '#f5f7f9'
        )
        1 => Array &3 (
            'slug' => 'dark'
            'name' => 'Ciemny'
            'color' => '#000'
        )
    )
    'custom' => false
) is identical to null.

/var/www/html/wp-content/plugins/gutenberg/phpunit/class-wp-theme-json-resolver-test.php:114

I believe that is probably a bug that is exposed by this fix (and that also needs to be addressed).

Types of changes

Bug fix.

@ockham ockham added [Feature] Themes Questions or issues with incorporating or styling blocks in a theme. Global Styles Anything related to the broader Global Styles efforts, including Styles Engine and theme.json labels Apr 2, 2021
@ockham ockham self-assigned this Apr 2, 2021
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This seems a simple change. But it's a pity that we need it though 😄
Maybe we should leave a comment why this is needed?

@@ -124,7 +124,7 @@ function _gutenberg_get_template_files( $template_type ) {
* @return array Template.
*/
function _gutenberg_add_template_part_area_info( $template_info ) {
if ( WP_Theme_JSON_Resolver::theme_has_support() ) {
if ( WP_Theme_JSON_Resolver::theme_has_support( $template_info['slug'] ) ) {
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The function doesn't accept any arguments.

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Thanks! Leftover from a previous iteration. I'll remove it.

@ockham ockham changed the title theme.json: Fix has_theme_support() theme.json: Fix theme_has_support() Apr 9, 2021
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ockham commented Apr 9, 2021

Heads-up, some new findings being discussed over at the issue. tl;dr -- this problem might be specific to unit tests.

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ockham commented Apr 9, 2021

Heads-up, some new findings being discussed over at the issue. tl;dr -- this problem might be specific to unit tests.

Alternative PR now available: #30686

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Actually, I prefer this PR over #30686

The #30686 PR doesn't really solve the problem, it's a workaround to make it work.

I think changing the theme programmatically (during runtime) is a legit use case, and to make sure this part of the code returns the correct value we need to make sure it works with that use case. So +1 for this over #30686

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ockham commented Apr 12, 2021

Actually, I prefer this PR over #30686

The #30686 PR doesn't really solve the problem, it's a workaround to make it work.

I'm not totally sure that's true. 🤔 wp-phpunit's bootstrap customizes WP's loading behavior quite a bit; I don't think that the fallback to the default theme (upon tests bootstrapping) is actually something you'd encounter in a "real-world" WP install.

I think changing the theme programmatically (during runtime) is a legit use case, and to make sure this part of the code returns the correct value we need to make sure it works with that use case.

That's true, but I think that the values that #30686 sets don't really preclude that; it's still possible for individual unit tests to change the theme (and a number of them actually do). IIUC, the $GLOBALS['wp_tests_options'] value really just changes the initially set theme for wp-phpunit (before any of the individual tests are run).

(That said, it's true that #30686 causes a few other unit tests to fail; we'll need to figure out if that's legit or not.)

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Have an alternative at #30830 See rationale #30478 (comment)

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ockham commented Apr 14, 2021

Closing in favor of #30830, which seems like a better solution (and doesn't cause existing unit tests to fail 😬 )

@ockham ockham closed this Apr 14, 2021
@ockham ockham deleted the fix/theme-json-theme-has-support branch April 14, 2021 13:39
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theme.json: theme_has_support() might cache wrong value
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