Add support for PHP 8 (#41)

* Drop hhvm from build matrix

* Bump minimal PHP version to 7.1

* Remove PHP 7.3 from allowed failures

* Add PHP 7.4 to build matrix

* Check platform requirements

* Replace `\PHPUnit_Framework_TestCase` with `\PHPUnit\Framework\TestCase`

* Bump PHPUnit to version 7.5

* Bump `webonyx/graphql-php` to version 0.13

* Prefer package sources on `composer update`

`tests/StarWarsData.php` is no longer part of `webonyx/graphql-php` package

* Fix deprecation for `GraphQL\Schema`

* Suppress deprecation errors in tests

* Bump `webonyx/graphql-php` to version 14

* Bump PHPUnit to version 8.5

* Allow PHPUnit 7 for compatibility with PHP 7.1

* Allow PHP 8

* Use current version of `php-cs-fixer`

* Switch Travis CI from `trusty` to `bionic`

* Add PHP 8.0 to the build matrix

* Don't run `php-cs-fixer` for PHP 8.0

Resolves #40.

Minimal PHP version increased to 7.1. (So that supported versions are same as in webonyx/graphql-php. Going up to 7.2 would make things easier regarding PHPUnit.)
Installation on PHP 8 allowed.
composer check-platform-reqs added to build steps
PHPUnit bumped to ^7.5|^8.5 to support PHP 7.1-8.0
webonyx/graphql-php updated to the current version 14
--prefer-source used for composer update as tests/StarWarsData.php is no longer part of webonyx/graphql-php package. Alternative options would be to create a local copy of the file in this repository or download it from webonyx/graphql-php repo with wget in before_install.
The current version of php-cs-fixer (2.16) used, however, it doesn't allow installation on PHP 8 yet (see PHP-CS-Fixer/PHP-CS-Fixer#4702).
PHPUnit option convertDeprecationsToExceptions disabled to deal with deprecated GraphQL::execute() (related to #39).

.travis.yml

@@ -1,16 +1,14 @@
-dist: trusty
+dist: bionic
 
 language: php
 
 php:
-  - 5.5
-  - 5.6
-  - 7.0
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
+  - 8.0
   - nightly
-  - hhvm
 
 branches:
   only:
@@ -20,21 +18,18 @@ branches:
 matrix:
   allow_failures:
     - php: nightly
-    - php: 7.3
 
 cache:
   directories:
     - $HOME/.composer/cache
 
 before_install:
-  - if [[ "$TRAVIS_PHP_VERSION" != "5.6" && "$TRAVIS_PHP_VERSION" != "hhvm" ]]; then phpenv config-rm xdebug.ini || true; fi
+  - phpenv config-rm xdebug.ini || true
   - composer selfupdate
 
-install: composer update --prefer-dist --no-interaction
+install: composer update --prefer-source --no-interaction
 
 script:
-  - if [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then bin/phpunit --debug --coverage-clover build/logs/clover.xml; else bin/phpunit --debug; fi
-  - if [ "$TRAVIS_PHP_VERSION" == "7.0" ]; then composer require "friendsofphp/php-cs-fixer:^2.0" && bin/php-cs-fixer fix --diff --dry-run -v; fi;
-
-after_success:
-  - if [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then composer require "satooshi/php-coveralls:^1.0" && travis_retry php bin/coveralls -v; fi
+  - composer check-platform-reqs
+  - bin/phpunit --debug
+  - if [ "$TRAVIS_PHP_VERSION" != "8.0" ]; then composer require "friendsofphp/php-cs-fixer:^2.16" && bin/php-cs-fixer fix --diff --dry-run -v; fi

composer.json

@@ -27,13 +27,13 @@
     "overblog/promise-adapter": "self.version"
   },
   "require": {
-    "php": "^5.5|^7.0"
+    "php": "^7.1|^8.0"
   },
   "require-dev": {
     "guzzlehttp/promises": "^1.3.0",
-    "phpunit/phpunit": "^4.1|^5.1",
+    "phpunit/phpunit": "^7.5|^8.5",
     "react/promise": "^2.5.0",
-    "webonyx/graphql-php": "^0.11.0"
+    "webonyx/graphql-php": "^14.0"
   },
   "suggest": {
     "guzzlehttp/promises": "To use with Guzzle promise",

lib/promise-adapter/tests/AdapterTest.php

@@ -16,7 +16,7 @@
 use Overblog\PromiseAdapter\Adapter\WebonyxGraphQLSyncPromiseAdapter;
 use Overblog\PromiseAdapter\PromiseAdapterInterface;
 
-class AdapterTest extends \PHPUnit_Framework_TestCase
+class AdapterTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @dataProvider AdapterDataProvider

phpunit.xml.dist

@@ -2,10 +2,11 @@
 
 <!-- http://phpunit.de/manual/4.1/en/appendixes.configuration.html -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.1/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
          backupGlobals="false"
          colors="true"
          bootstrap="./vendor/autoload.php"
+         convertDeprecationsToExceptions="false"
 >
     <php>
         <ini name="error_reporting" value="-1" />

tests/Functional/Webonyx/GraphQL/Schema.php

@@ -81,6 +81,6 @@ public static function build(DataLoader $dataLoader)
             ]
         ]);
 
-        return new \GraphQL\Schema(['query' => $queryType]);
+        return new \GraphQL\Type\Schema(['query' => $queryType]);
     }
 }

tests/Functional/Webonyx/GraphQL/TestCase.php

@@ -18,7 +18,7 @@
 use Overblog\DataLoader\DataLoader;
 use Overblog\PromiseAdapter\PromiseAdapterInterface;
 
-abstract class TestCase extends \PHPUnit_Framework_TestCase
+abstract class TestCase extends \PHPUnit\Framework\TestCase
 {
     private static $fixtures = null;
 

tests/TestCase.php

@@ -14,14 +14,14 @@
 use Overblog\PromiseAdapter\Adapter\ReactPromiseAdapter;
 use Overblog\PromiseAdapter\PromiseAdapterInterface;
 
-abstract class TestCase extends \PHPUnit_Framework_TestCase
+abstract class TestCase extends \PHPUnit\Framework\TestCase
 {
     /**
      * @var PromiseAdapterInterface
      */
     protected static $promiseAdapter;
 
-    public function setUp()
+    public function setUp(): void
     {
         self::$promiseAdapter = new ReactPromiseAdapter();
     }