Test install using real composer plugin

Author: mvorisek

.github/workflows/ci.yml

@@ -66,3 +66,40 @@ jobs:
 
       - name: Run Static Analysis
         run: vendor/bin/phpstan analyse
+
+  test:
+    runs-on: ubuntu-latest
+    if: "!contains(github.event.head_commit.message, '[skip ci]') && !contains(github.event.head_commit.message, '[ci skip]')"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ["7.3", "7.4", "8.0", "8.1", "8.2", "8.3"]
+
+    name: Test / PHP ${{ matrix.php }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: mbstring
+          tools: composer:v2
+          coverage: none
+
+      - name: Set COMPOSER_ROOT_VERSION
+        run: echo "COMPOSER_ROOT_VERSION=0.3.99" >> $GITHUB_ENV
+
+      - name: Test - install plugin
+        run: |
+          cd test-composer
+          composer install --prefer-dist --no-interaction --no-progress
+
+      - name: Test - verify install
+        run: |
+          cd test-composer
+          ls -lah vendor/roundcube/roundcubemail/plugins/carddav
+          ls -lah vendor/roundcube/roundcubemail/plugins/carddav/config.inc.php

.gitignore

@@ -1,2 +1,5 @@
 /composer.lock
-/vendor
+/vendor/
+
+/test-composer/*
+!/test-composer/composer.json

test-composer/composer.json

@@ -0,0 +1,23 @@
+{
+    "name": "roundcube/plugin-installer-test",
+    "require": {
+        "roundcube/carddav": "^4 || ^5"
+    },
+    "repositories": [
+        {
+            "type": "git",
+            "url": "https://github.com/roundcube/roundcubemail.git"
+        },
+        {
+            "type": "path",
+            "url": ".."
+        }
+    ],
+    "minimum-stability": "dev",
+    "prefer-stable": true,
+    "config": {
+        "allow-plugins": {
+            "roundcube/plugin-installer": true
+        }
+    }
+}