What

This PR makes two types of test improvements across three test files.

1. Add missing @covers annotations

Adds @covers tags to test classes that were missing them, as part of the ongoing effort in #64225:

Both add_rewrite_rule() and add_rewrite_endpoint() are defined in src/wp-includes/rewrite.php.

Without @covers, PHPUnit cannot correctly attribute code coverage to the functions under test, which leads to inaccurate coverage reports on Codecov.

2. Refactor repeated invalid block name tests to use a data provider

In Tests_Blocks_wpBlockTypeRegistry, four separate test methods were structurally identical — each registered one invalid block name and asserted false:

• test_invalid_non_string_names()
• test_invalid_names_without_namespace()
• test_invalid_characters()
• test_uppercase_characters()

These have been consolidated into a single test_invalid_block_names() method backed by a data_invalid_block_names() data provider with named cases, following the same pattern used in recently updated tests across the suite.

Before: 4 methods × ~9 lines each = ~36 lines

After: 1 method + 1 data provider = ~21 lines

Named data sets also make PHPUnit failure output more readable — instead of test_invalid_characters you see test_invalid_block_names with data set "invalid characters", which is clearer at a glance.

Testing

Ran all three affected test classes locally:                                                                              

npm run test:php -- --filter "Tests_Rewrite_AddRewriteRule|Tests_Rewrite_AddRewriteEndpoint|Tests_Blocks_wpBlockTypeRegistry"                                                       
                                                                                                                             
OK (20 tests, 42 assertions)

All passing. The data provider runs each case as its own PHPUnit test, so the assertion count is unchanged.

Trac

See https://core.trac.wordpress.org/ticket/64225

This is my first contribution to WordPress core. I've enabled "Allow and access to secrets by maintainers". Happy to adjust anything based on review feedback.