Change codeception to phpunit

composer.json

@@ -14,18 +14,18 @@
         }
     ],
     "scripts": {
-        "test": "./vendor/bin/codecept run"
+        "test": "./vendor/bin/phpunit tests/*Test.php"
     },
     "require": {
         "php": "^7.0"
     },
      "require-dev": {
-        "codeception/codeception": "^2.5"
+        "phpunit/phpunit": "^7"
     },
     "autoload": {
         "psr-4": {
             "Baka\\Support\\": "src/"
         }
     },
     "minimum-stability": "dev"
-}
+}

phpunit.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         bootstrap="vendor/autoload.php"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false"
+         verbose="true"
+>
+    <testsuites>
+        <testsuite name="support/tests">
+            <directory suffix="Test.php">./tests/</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist>
+            <directory suffix=".php">./src/</directory>
+        </whitelist>
+    </filter>
+    <logging>
+        <log type="coverage-text" target="php://stdout" showUncoveredFiles="true"/>
+        <log type="coverage-clover" target="coverage.xml" showUncoveredFiles="true"/>
+    </logging>
+</phpunit>

tests/ArrTest.php

@@ -1,8 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 use Baka\Support\Arr;
+use PHPUnit\Framework\TestCase;
 
-class ArrTest extends \Codeception\Test\Unit
+class ArrTest extends TestCase
 {
     public function testAll()
     {

tests/StrTest.php

@@ -1,8 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 use Baka\Support\Str;
+use PHPUnit\Framework\TestCase;
 
-class StrTest extends \Codeception\Test\Unit
+class StrTest extends TestCase
 {
     public function testEndsWith()
     {