added local test env using docker

Dockerfile

@@ -0,0 +1,27 @@
+FROM php:7.4-alpine3.13
+
+RUN mkdir /app
+
+WORKDIR /app
+
+# Install Git, NPM & needed libraries
+RUN apk update \
+    && apk add bash git nodejs npm gettext subversion mysql mysql-client zip \
+    && rm -f /var/cache/apk/*
+
+RUN docker-php-ext-install mysqli
+
+#  Install Composer
+RUN EXPECTED_CHECKSUM=$(curl -s https://composer.github.io/installer.sig) \
+    && curl https://getcomposer.org/installer -o composer-setup.php \
+    && ACTUAL_CHECKSUM="$(php -r "echo hash_file('sha384', 'composer-setup.php');")" \
+    && if [ "$EXPECTED_CHECKSUM" != "$ACTUAL_CHECKSUM" ]; then >&2 echo 'ERROR: Invalid installer checksum'; rm composer-setup.php; exit 1; fi \
+    && php composer-setup.php --quiet \
+    && php -r "unlink('composer-setup.php');" \
+    && mv composer.phar /usr/local/bin/composer
+
+RUN curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar && \
+    chmod +x wp-cli.phar && \
+    mv wp-cli.phar /usr/local/bin/wp
+
+RUN chmod +x -R ./

composer.json

@@ -32,10 +32,10 @@
         "installer-name": "activitypub"
     },
     "scripts": {
-        "test": [
+      "test": [
-            "composer install",
+        "composer install",
-            "bin/install-wp-tests.sh wordpress wordpress wordpress",
+        "bin/install-wp-tests.sh activitypub-test root activitypub-test test-db latest true",
-            "vendor/bin/phpunit"
+        "vendor/bin/phpunit"
-        ]
+      ]
     }
 }

docker-compose-test.yml

@@ -0,0 +1,17 @@
+version: '2'
+services:
+  test-db:
+    image: mysql:5.7
+    environment:
+      MYSQL_DATABASE: activitypub-test
+      MYSQL_ROOT_PASSWORD: activitypub-test
+
+  test-php:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    links:
+      - test-db
+    volumes:
+      - .:/app
+    command: ["composer", "run-script", "test"]

phpunit.xml.dist

@@ -7,7 +7,7 @@
 	convertWarningsToExceptions="true"
 	>
 	<testsuites>
-		<testsuite>
+		<testsuite name="ActivityPub">
 			<directory prefix="test-" suffix=".php">./tests/</directory>
 		</testsuite>
 	</testsuites>