Add WordPress 6.8, 6.9, and trunk to PHPUnit test matrix (#230)

* Add WordPress 6.8, 6.9, and trunk to PHPUnit test matrix

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: JJJ <[email protected]>
Co-authored-by: John James Jacoby <[email protected]>

Author: Copilot

.github/workflows/phpunit-ci.yml

@@ -18,6 +18,36 @@ jobs:
         # Based on WordPress version requirements and PHP compatibility
         # Note: WordPress officially only supports PHPUnit up to 7.x
         include:
+          # WordPress trunk (development) - PHP 7.2+
+          - wordpress: "trunk"
+            php: "8.3"
+            phpunit: "9"
+            wp-version: "trunk"
+
+          # WordPress 6.9 - PHP 7.2+
+          - wordpress: "6.9"
+            php: "8.3"
+            phpunit: "9"
+            wp-version: "6.9"
+          - wordpress: "6.9"
+            php: "8.2"
+            phpunit: "9"
+            wp-version: "6.9"
+
+          # WordPress 6.8 - PHP 7.2+
+          - wordpress: "6.8"
+            php: "8.3"
+            phpunit: "9"
+            wp-version: "6.8"
+          - wordpress: "6.8"
+            php: "8.2"
+            phpunit: "9"
+            wp-version: "6.8"
+          - wordpress: "6.8"
+            php: "8.1"
+            phpunit: "9"
+            wp-version: "6.8"
+
           # WordPress 6.7+ (latest) - PHP 7.2+
           - wordpress: "latest"
             php: "8.3"

TESTING.md

@@ -24,6 +24,9 @@ The testing matrix is designed to validate the plugin against various combinatio
 
 | WordPress Version | Minimum PHP | Recommended PHP |
 |------------------|-------------|-----------------|
+| trunk            | 7.2.24      | 8.0+           |
+| 6.9              | 7.2.24      | 8.0+           |
+| 6.8              | 7.2.24      | 8.0+           |
 | 6.7 (latest)     | 7.2.24      | 8.0+           |
 | 6.4 - 6.6        | 7.2.24      | 8.0+           |
 | 6.0 - 6.3        | 7.2.24      | 7.4+           |
@@ -34,7 +37,22 @@ The testing matrix is designed to validate the plugin against various combinatio
 
 The GitHub Actions workflow (`.github/workflows/phpunit-ci.yml`) runs tests across the following combinations:
 
-### Latest WordPress (6.7+)
+### WordPress trunk (development)
+
+- PHP 8.3 + PHPUnit 9
+
+### WordPress 6.9
+
+- PHP 8.3 + PHPUnit 9
+- PHP 8.2 + PHPUnit 9
+
+### WordPress 6.8
+
+- PHP 8.3 + PHPUnit 9
+- PHP 8.2 + PHPUnit 9
+- PHP 8.1 + PHPUnit 9
+
+### Latest WordPress (6.7)
 
 - PHP 8.3 + PHPUnit 9
 - PHP 8.2 + PHPUnit 9