Validators: added 'file', 'directory', 'class', 'interface' & mixed

Author: dg

src/Utils/Validators.php

@@ -37,6 +37,7 @@ class Validators
 		'callable' => [__CLASS__, 'isCallable'],
 		'iterable' => 'is_iterable',
 		'list' => [Arrays::class, 'isList'],
+		'mixed' => [__CLASS__, 'isMixed'],
 		'none' => [__CLASS__, 'isNone'],
 		'number' => [__CLASS__, 'isNumber'],
 		'numeric' => [__CLASS__, 'isNumeric'],
@@ -60,6 +61,10 @@ class Validators
 		'url' => [__CLASS__, 'isUrl'],
 
 		// environment validation
+		'class' => 'class_exists',
+		'interface' => 'interface_exists',
+		'directory' => 'is_dir',
+		'file' => 'is_file',
 		'type' => [__CLASS__, 'isType'],
 	];
 
@@ -236,6 +241,13 @@ public static function isNone($value): bool
 	}
 
 
+	/** @internal */
+	public static function isMixed(): bool
+	{
+		return true;
+	}
+
+
 	/**
 	 * Finds whether a variable is a zero-based integer indexed array.
 	 */

tests/Utils/Validators.is().phpt

@@ -170,6 +170,12 @@ test(function () {
 });
 
 
+test(function () {
+	Assert::true(Validators::is([], 'mixed'));
+	Assert::true(Validators::is(null, 'mixed'));
+});
+
+
 test(function () {
 	Assert::false(Validators::is('', 'email'));
 	Assert::false(Validators::is(false, 'email'));
@@ -321,6 +327,32 @@ test(function () {
 });
 
 
+test(function () {
+	Assert::true(Validators::is('rimmer', 'class'));
+	Assert::false(Validators::is('kryton', 'class'));
+	Assert::false(Validators::is('1', 'class'));
+});
+
+
+test(function () {
+	Assert::false(Validators::is('rimmer', 'interface'));
+	Assert::true(Validators::is('kryton', 'interface'));
+	Assert::false(Validators::is('1', 'interface'));
+});
+
+
+test(function () {
+	Assert::true(Validators::is(__FILE__, 'file'));
+	Assert::false(Validators::is(__FILE__ . 'xx', 'class'));
+});
+
+
+test(function () {
+	Assert::true(Validators::is(__DIR__, 'directory'));
+	Assert::false(Validators::is(__DIR__ . 'xx', 'directory'));
+});
+
+
 test(function () {
 	Assert::true(Validators::is('Item', 'identifier'));
 	Assert::false(Validators::is('0Item', 'identifier'));