Test using Travis CI

.travis.yml

@@ -1,21 +1,91 @@
 language: php
 
+services:
+  - mysql
+
 php:
-  - 5.4
-  - 5.5
   - 5.6
-  - hhvm
+  - 7.0
+  - 7.1
+  - 7.2
+  - 7.3
+  - 7.4
+
+env:
+  - LARAVEL_VERSION=5.4.*
+  - LARAVEL_VERSION=5.5.*
+  - LARAVEL_VERSION=5.6.*
+  - LARAVEL_VERSION=5.7.*
+  - LARAVEL_VERSION=5.8.*
+  - LARAVEL_VERSION=6.*
+  - LARAVEL_VERSION=7.*
+
+matrix:
+  exclude:
+    - php: 5.6
+      env: LARAVEL_VERSION=5.5.*
+    - php: 5.6
+      env: LARAVEL_VERSION=5.6.*
+    - php: 7.0
+      env: LARAVEL_VERSION=5.6.*
+    - php: 7.4
+      env: LARAVEL_VERSION=5.6.*
+    - php: 5.6
+      env: LARAVEL_VERSION=5.7.*
+    - php: 7.0
+      env: LARAVEL_VERSION=5.7.*
+    - php: 7.4
+      env: LARAVEL_VERSION=5.7.*
+    - php: 5.6
+      env: LARAVEL_VERSION=5.8.*
+    - php: 7.0
+      env: LARAVEL_VERSION=5.8.*
+    - php: 7.1
+      env: LARAVEL_VERSION=5.8.*
+    - php: 5.6
+      env: LARAVEL_VERSION=6.*
+    - php: 7.0
+      env: LARAVEL_VERSION=6.*
+    - php: 7.1
+      env: LARAVEL_VERSION=6.*
+    - php: 5.6
+      env: LARAVEL_VERSION=7.*
+    - php: 7.0
+      env: LARAVEL_VERSION=7.*
+    - php: 7.1
+      env: LARAVEL_VERSION=7.*
+    - php: 7.1
+      env: LARAVEL_VERSION=5.4.*
+    - php: 7.2
+      env: LARAVEL_VERSION=5.4.*
+    - php: 7.3
+      env: LARAVEL_VERSION=5.4.*
+    - php: 7.4
+      env: LARAVEL_VERSION=5.4.*
+
+jobs:
+  fast_finish: true
 
 sudo: false
 
-install: travis_retry composer install --no-interaction --prefer-source
+# ensure that the specific Laravel version is required
+before_install:
+  - composer require "laravel/framework:${LARAVEL_VERSION}" --no-update
+
+install: composer update --no-interaction --prefer-dist
 
 before_script:
   - mysql -e 'create database closuretabletest;'
+  - php ./tests/script-change-testcase-return-type.php
 
-script: vendor/bin/phpunit
+script: 
+  - vendor/bin/phpunit
 
 branches:
   only:
     - master
-    - feature/laravel-5
+    - 6.x
+    - travis-ci-for-6.x
+    # version tag, e.g. v1.0.0
+    - /^v\d+\.\d+(\.\d+)?(-\S*)?$/
+    - /^\d+\.\d+?$/

composer.json

@@ -15,8 +15,8 @@
         "php": ">=5.6.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6",
-        "orchestra/testbench": "^3.5"
+        "phpunit/phpunit": "^5.0|^6.0|^7.0|^8.0",
+        "orchestra/testbench": "^3.4|^4.0|^5.0"
     },
     "autoload": {
         "psr-4": {

phpunit.xml

@@ -8,7 +8,6 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="true"
-         syntaxCheck="true"
 >
     <testsuites>
         <testsuite name="Package Test Suite">

tests/script-change-testcase-return-type.php

@@ -0,0 +1,8 @@
+<?php 
+
+if(version_compare(phpversion(), '7.1', '<')){
+    exit(0);
+}
+
+file_put_contents('tests/BaseTestCase.php', str_replace('public function setUp()', 'public function setUp(): void', file_get_contents('tests/BaseTestCase.php')));
+file_put_contents('tests/BaseTestCase.php', str_replace('public function tearDown()', 'public function tearDown(): void', file_get_contents('tests/BaseTestCase.php')));