Fixed PHP 7.2 tests with PHPUnit 5

.travis.yml

@@ -8,19 +8,19 @@ php:
     - hhvm
 
 env:
-    - SWIFTMAILER=4 DEPENDENCIES=high
-    - SWIFTMAILER=4 DEPENDENCIES=low
-    - SWIFTMAILER=5 DEPENDENCIES=high
-    - SWIFTMAILER=5 DEPENDENCIES=low
-    - SWIFTMAILER=6 DEPENDENCIES=high
-    - SWIFTMAILER=6 DEPENDENCIES=low
+    - SWIFTMAILER=^4.0 DEPENDENCIES=high
+    - SWIFTMAILER=^4.0 DEPENDENCIES=low
+    - SWIFTMAILER=^5.0 DEPENDENCIES=high
+    - SWIFTMAILER=^5.0 DEPENDENCIES=low
+    - SWIFTMAILER=^6.0 DEPENDENCIES=high
+    - SWIFTMAILER=^6.0 DEPENDENCIES=low
 
 matrix:
     exclude:
         - php: 5.6
-          env: SWIFTMAILER=6 DEPENDENCIES=high
+          env: SWIFTMAILER=^6.0 DEPENDENCIES=high
         - php: 5.6
-          env: SWIFTMAILER=6 DEPENDENCIES=low
+          env: SWIFTMAILER=^6.0 DEPENDENCIES=low
     allow_failures:
         - php: hhvm
         - php: nightly
@@ -30,10 +30,11 @@ cache:
         - $HOME/.composer/cache
 
 install:
-    - composer require "swiftmailer/swiftmailer ^$SWIFTMAILER" --no-update
-    - if [[ "$DEPENDENCIES" = 'high' ]]; then composer update; fi
-    - if [[ "$DEPENDENCIES" = 'low' ]]; then composer update --prefer-lowest; fi
-    - composer require php-coveralls/php-coveralls '^2.0' --dev
+    - if [[ ! -z $SWIFTMAILER ]]; then composer require "swiftmailer/swiftmailer $SWIFTMAILER" --no-update; fi
+    - if [[ ${TRAVIS_PHP_VERSION:0:3} > 7.1 ]]; then composer require "phpunit/phpunit >=6.0 <8" --dev --no-update; fi # PHPUnit 5 is installed in PHP 7.2 despite it doesn't work in PHP 7.2
+    - if [[ $DEPENDENCIES = high ]]; then composer update; fi
+    - if [[ $DEPENDENCIES = low ]]; then composer update --prefer-lowest; fi
+    - composer require php-coveralls/php-coveralls ^2.0 --dev
 
 script:
     - php vendor/bin/phpunit --coverage-clover ./tests/logs/clover.xml

composer.json

@@ -13,10 +13,10 @@
 	],
 	"require": {
 		"php": ">=5.6",
-		"swiftmailer/swiftmailer": "^4.0 || ^5.0 || ^6.0"
+		"swiftmailer/swiftmailer": ">=4.0 <7.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "^5.0",
+		"phpunit/phpunit": ">=5.4 <8.0",
 		"mockery/mockery": "^1.0"
 	},
 	"autoload": {

tests/SwiftMailerDefaultsPluginTest.php

@@ -3,13 +3,14 @@
 namespace Finesse\SwiftMailerDefaultsPlugin\Tests;
 
 use Finesse\SwiftMailerDefaultsPlugin\SwiftMailerDefaultsPlugin;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Test for the SwiftMailerDefaultsPlugin class.
  *
  * @author Surgie
  */
-class SwiftMailerDefaultsPluginTest extends \PHPUnit_Framework_TestCase
+class SwiftMailerDefaultsPluginTest extends TestCase
 {
     /**
      * @inheritDoc