FEATURE: Initialized unit tests

.gitlab-ci.yml

 stages:
   - lint
+  - test
 
 .lint: &lint
   image: composer
@@ -26,3 +27,37 @@ lint:coding-guideline:
   script:
     - mkdir result
     - ./vendor/bin/phpcs -n --report-full=result/phpcs-full.txt --report-diff=result/phpcs-diff.txt --report-summary=result/phpcs-summary.txt
+
+.test: &test
+  stage: test
+  tags:
+    - docker
+  variables:
+    TIMEZONE: "Europe/Berlin"
+    WITH_XDEBUG: "true"
+  before_script:
+    - apt-get update; apt-get install -y unzip
+    - composer install --optimize-autoloader --no-interaction --no-ansi --prefer-dist
+  script:
+    - ./vendor/bin/phpunit --coverage-text --colors=never
+test:5.3:
+  <<: *test
+  image: tetraweb/php:5.3
+test:5.4:
+  <<: *test
+  image: tetraweb/php:5.4
+test:5.5:
+  <<: *test
+  image: tetraweb/php:5.5
+test:5.6:
+  <<: *test
+  image: tetraweb/php:5.6
+test:7.0:
+  <<: *test
+  image: tetraweb/php:7.0
+test:7.1:
+  <<: *test
+  image: tetraweb/php:7.1
+test:latest:
+  <<: *test
+  image: tetraweb/php:latest

composer.json

@@ -25,11 +25,17 @@
     "issues": "https://git.higidi.com/higidi/ninja-mutex/issues",
     "source": "https://git.higidi.com/higidi/ninja-mutex"
   },
+  "autoload-dev": {
+    "psr-4": {
+      "Higidi\\NinjaMutex\\Tests\\": "tests/"
+    }
+  },
   "require": {
     "php": ">=5.3.0",
     "arvenil/ninja-mutex": "^0.6"
   },
   "require-dev": {
-    "squizlabs/php_codesniffer": "^2.9|^3.0"
+    "squizlabs/php_codesniffer": "^2.9||^3.0",
+    "phpunit/phpunit": "^4.5||^5.0.5"
   }
 }

phpcs.xml.dist

@@ -7,4 +7,10 @@
     <arg name="encoding" value="utf-8" />
 
     <rule ref="PSR2"/>
+
+    <file>./tests</file>
+
+    <rule ref="PSR1.Files.SideEffects.FoundWithSymbols">
+        <exclude-pattern>./tests/bootstrap.php</exclude-pattern>
+    </rule>
 </ruleset>

phpunit.xml.dist

+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false"
+         syntaxCheck="false"
+         bootstrap="tests/bootstrap.php">
+
+    <filter>
+        <whitelist>
+            <directory>./src/</directory>
+        </whitelist>
+    </filter>
+</phpunit>

tests/bootstrap.php

+<?php
+
+error_reporting(E_ALL);
+
+if (function_exists('date_default_timezone_set') && function_exists('date_default_timezone_get')) {
+    date_default_timezone_set(@date_default_timezone_get());
+}
+
+function includeIfExists($file)
+{
+    return file_exists($file) ? include $file : false;
+}
+
+if (!$autoLoader = includeIfExists(__DIR__ . '/../vendor/autoload.php')) {
+    echo 'You must set up the project dependencies, run the following command from the project root:' . PHP_EOL .
+        'php composer.phar install' . PHP_EOL;
+    exit(1);
+}
+
+return $autoLoader;