ci: add matrix testing

.github/workflows/test-e2e-matrix.yml

@@ -0,0 +1,39 @@
+name: E2E Tests
+
+on:
+  pull_request:
+
+jobs:
+  e2e_tests:
+    name: >
+      E2E - ${{
+        format(
+          'WP{0} + PHP{1}',
+          matrix.wp,
+          matrix.php
+        )
+      }}
+    uses: ./.github/workflows/test-e2e.yml
+    strategy:
+      fail-fast: false
+      matrix:
+        wp: # Test against Prev-Prev Major, Prev-Major, and current Major release versions.
+          - '6.5'
+          - '6.6'
+          - '6.7'
+        php: # Test against minimum and latest PHP versions.
+          - '7.4'
+          - '8.3'
+    with:
+      wpVersion: ${{matrix.wp}}
+      phpVersion: ${{matrix.php}}
+    concurrency:
+      group: >
+        ${{
+          format(
+            'e2e-WP{0}-PHP{1}',
+            matrix.wp,
+            matrix.php
+          )
+        }}
+      cancel-in-progress: true

.github/workflows/test-e2e.yml

@@ -1,4 +1,4 @@
-name: 'E2E Tests'
+name: E2E Tests
 
 on:
   workflow_dispatch:
@@ -14,15 +14,26 @@ on:
         type: string
         default: '8.2'
 
-  pull_request:
+  workflow_call:
+    inputs:
+      wpVersion:
+        description: 'Enter WP version (eg 6.6)'
+        required: false
+        type: string
+        default: ''
+      phpVersion:
+        description: 'Enter PHP version (eg 8.2)'
+        required: false
+        type: string
+        default: '8.2'
 
 jobs:
   test:
     runs-on: ubuntu-latest
     env:
       # trenary ${{ condition && if-value || else-value }}
-      INSERI_WP_CORE: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.wpVersion != '' && format('WordPress/WordPress#{0}', github.event.inputs.wpVersion) || '' }}
-      INSERI_WP_PHP: ${{  github.event_name == 'workflow_dispatch' && github.event.inputs.phpVersion || '8.2' }}
+      INSERI_WP_CORE: ${{ inputs.wpVersion != '' && format('WordPress/WordPress#{0}', inputs.wpVersion) || '' }}
+      INSERI_WP_PHP: ${{ inputs.phpVersion }}
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4