Use phpstan

Author: Sevavietl

.travis.yml

@@ -13,7 +13,8 @@ install:
 - travis_retry composer install --no-interaction --prefer-source
 
 script:
-- vendor/bin/phpunit --coverage-clover build/logs/clover.xml
+  - vendor/bin/phpstan analyze src/ tests/ --level max
+  - vendor/bin/phpunit --coverage-clover build/logs/clover.xml
 
 after_success:
 - travis_retry php vendor/bin/php-coveralls -v

README.md

@@ -3,6 +3,7 @@
 [![Build Status](https://travis-ci.com/Sevavietl/Arrays.svg?branch=master)](https://travis-ci.com/Sevavietl/Arrays)
 [![Coverage Status](https://coveralls.io/repos/github/Sevavietl/Arrays/badge.svg)](https://coveralls.io/github/Sevavietl/Arrays)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![PHPStan](https://img.shields.io/badge/PHPStan-enabled-brightgreen.svg?style=flat)](https://github.com/phpstan/phpstan)
 
 This is a collection of array wrappers.
 

composer.json

@@ -13,11 +13,12 @@
         }
     ],
     "require": {
-        "php": ">=7.2",
-        "phpunit/phpunit": "^8.0"
+        "php": ">=7.2"
     },
     "require-dev": {
-        "php-coveralls/php-coveralls": "^2.1"
+        "php-coveralls/php-coveralls": "^2.1",
+        "phpunit/phpunit": "^8.0",
+        "phpstan/phpstan": "^0.11.2"
     },
     "autoload": {
         "psr-4": {

src/CompositeKeyArray.php

@@ -6,6 +6,8 @@ class CompositeKeyArray extends BaseArray
 {
     protected $offsets;
 
+    private $value;
+
     public function offsetExists($offset)
     {
         $this->setOffsets($offset);

tests/unit/BaseArrayTest.php

@@ -39,7 +39,7 @@ public function instantiationThrowsExceptionDataProvider(): array
         return [
             [1],
             ['foo'],
-            [new \StdClass],
+            [new \stdClass],
         ];
     }