Add CI and the shared Release workflow, and revive the test suite

[harikt]

This package had neither continuous integration nor a release workflow. Releasing it meant tagging by hand — which is what the shared workflow exists to prevent: Packagist derives versions from tags, so a tag is a published version the moment it exists, and checks that run after a tag push cannot un-publish anything.

Adding the release workflow alone would not have worked, so this does the whole job.

Why the test suite had to be revived

The shared workflow's pre-tag gate runs ./vendor/bin/phpunit. This package declared no test runner at all — no require-dev — so composer install produced no phpunit binary. Adding one exposed the real problem: the suite was written against the PHPUnit 4/5 API that PHPUnit 6 removed, so it could not run on any supported PHP version.

I revived it rather than substituting a weaker gate, because a release gate that runs nothing is not a gate.

• Tests extend PHPUnit\Framework\TestCase, and setUp() now declares : void as PHPUnit 8+ requires — without the return type the declaration is outright incompatible with the parent and fatals.
• phpunit/phpunit: ^11.0 added to require-dev; phpunit.xml.dist updated to the current schema.

A real bug this surfaced

testAddPrefix could never have passed. The nds() helper normalizes path separators with str_replace(), but it is handed the nested array from getPrefixes(), and str_replace() on a nested array stringifies the inner arrays to 'Array':

-    'Foo\Bar\' => Array &1 [
-        0 => '/path/to/foo-bar/src/',
-        1 => '/path/to/foo-bar/tests/',
-    ],
+    'Foo\Bar\' => 'Array',

I checked the library itself before touching anything — getPrefixes() returns exactly the right structure in the right prepend order. The bug is in the test helper, which now recurses. This went unnoticed for nine years precisely because there was no CI.

Change log

CHANGES.md held a single unheaded line, so the release workflow would have failed at release-notes extraction (no version heading to release from). It now has headings.

The heading over the existing line is not a guess: HEAD is the 2.0.4 tag, and that line was written by that tag's own release commit (update for release). A 2.0.5 section describes this change.

Verified on PHP 8.4

• composer validate --no-check-lock --no-check-publish — passes.
• ./vendor/bin/phpunit — OK (11 tests, 17 assertions), exit 0.
• Change log extraction resolves to 2.0.5 with no unreleased marker.

No library code changed and require.php is untouched, so nothing changes for consumers. CI covers PHP 8.2–8.4; require.php still says >=5.3.0, which is now broader than what is tested — worth a separate look.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Lgup8xLZHLQmavt7JoEQ4C

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