test can validate boolean value

Author: jpuck

tests/Dotenv/ValidatorBooleanTest.php

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+<?php
+
+use Dotenv\Dotenv;
+
+class ValidatorBooleanTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @var string
+     */
+    private $fixturesFolder;
+
+    public function setUp()
+    {
+        $this->fixturesFolder = dirname(__DIR__).'/fixtures/env';
+    }
+
+    /**
+     * List of valid boolean values in fixtures/env/booleans.env
+     *
+     * @return array
+     */
+    public function validBooleanValuesDataProvider()
+    {
+        return [
+            ['VALID_EXPLICIT_LOWERCASE_TRUE'],
+            ['VALID_EXPLICIT_LOWERCASE_FALSE'],
+            ['VALID_EXPLICIT_UPPERCASE_TRUE'],
+            ['VALID_EXPLICIT_UPPERCASE_FALSE'],
+            ['VALID_EXPLICIT_MIXEDCASE_TRUE'],
+            ['VALID_EXPLICIT_MIXEDCASE_FALSE'],
+
+            ['VALID_NUMBER_TRUE'],
+            ['VALID_NUMBER_FALSE'],
+
+            ['VALID_ONOFF_LOWERCASE_TRUE'],
+            ['VALID_ONOFF_LOWERCASE_FALSE'],
+            ['VALID_ONOFF_UPPERCASE_TRUE'],
+            ['VALID_ONOFF_UPPERCASE_FALSE'],
+            ['VALID_ONOFF_MIXEDCASE_TRUE'],
+            ['VALID_ONOFF_MIXEDCASE_FALSE'],
+
+            ['VALID_YESNO_LOWERCASE_TRUE'],
+            ['VALID_YESNO_LOWERCASE_FALSE'],
+            ['VALID_YESNO_UPPERCASE_TRUE'],
+            ['VALID_YESNO_UPPERCASE_FALSE'],
+            ['VALID_YESNO_MIXEDCASE_TRUE'],
+            ['VALID_YESNO_MIXEDCASE_FALSE'],
+        ];
+    }
+
+    /**
+     * @dataProvider validBooleanValuesDataProvider
+     */
+    public function testCanValidateBooleans($boolean)
+    {
+        $dotenv = new Dotenv($this->fixturesFolder, 'booleans.env');
+        $dotenv->load();
+
+        $dotenv->required($boolean)->isBoolean();
+
+        $this->assertTrue(true); // anything wrong - an exception will be thrown
+    }
+}

tests/fixtures/env/booleans.env

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+VALID_EXPLICIT_LOWERCASE_TRUE=true
+VALID_EXPLICIT_LOWERCASE_FALSE=false
+VALID_EXPLICIT_UPPERCASE_TRUE=TRUE
+VALID_EXPLICIT_UPPERCASE_FALSE=FALSE
+VALID_EXPLICIT_MIXEDCASE_TRUE=True
+VALID_EXPLICIT_MIXEDCASE_FALSE=False
+
+VALID_NUMBER_TRUE=1
+VALID_NUMBER_FALSE=0
+
+VALID_ONOFF_LOWERCASE_TRUE=on
+VALID_ONOFF_LOWERCASE_FALSE=off
+VALID_ONOFF_UPPERCASE_TRUE=ON
+VALID_ONOFF_UPPERCASE_FALSE=OFF
+VALID_ONOFF_MIXEDCASE_TRUE=On
+VALID_ONOFF_MIXEDCASE_FALSE=Off
+
+VALID_YESNO_LOWERCASE_TRUE=yes
+VALID_YESNO_LOWERCASE_FALSE=no
+VALID_YESNO_UPPERCASE_TRUE=YES
+VALID_YESNO_UPPERCASE_FALSE=NO
+VALID_YESNO_MIXEDCASE_TRUE=Yes
+VALID_YESNO_MIXEDCASE_FALSE=No