add test workflow, add min php version to composer.json

.github/workflows/test.yaml

@@ -0,0 +1,44 @@
+name: Tests
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - master
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version: [ '8.3' ]
+
+    name: Run tests on PHP v${{ matrix.php-version }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+
+      - name: Set composer cache directory
+        id: composer-cache
+        run: echo "COMPOSER_CACHE_DIRECTORY=$(composer config cache-files-dir)" >> $GITHUB_ENV
+
+      - name: Restore composer from cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.COMPOSER_CACHE_DIRECTORY }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: Install composer dependencies
+        run: composer install --no-interaction --prefer-dist --no-progress
+
+      - name: Run phpunit tests
+        run: composer test

composer.json

@@ -6,7 +6,8 @@
         "psr/http-client": "^1.0",
         "psr/http-message": "^2.0",
         "psr/http-factory": "^1.1",
-        "ext-curl": "*"
+        "ext-curl": "*",
+        "php": ">=8.3.0"
     },
     "provide": {
         "psr/http-client-implementation": "1.0",
@@ -32,5 +33,8 @@
     ],
     "require-dev": {
         "phpunit/phpunit": "^11.4"
+    },
+    "scripts": {
+        "test": "phpunit --config phpunit.xml --testdox"
     }
 }