add isHexColor() method

Author: Awilum

src/Strings.php

@@ -1708,6 +1708,16 @@ public function format(...$args): self
         return $this;
     }
 
+    /**
+     * Returns true if the string is hex color, false otherwise.
+     *
+     * @return bool Returns TRUE on success or FALSE otherwise.
+     */
+    public function isHexColor(): bool
+    {
+        return (bool) mb_ereg_match('^#?([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$', $this->string);
+    }
+
     /**
      * Returns true if the string is affirmative, false otherwise.
      *

tests/StringsTest.php

@@ -752,6 +752,14 @@
     $this->assertFalse(Strings::create('90/11/2022')->isDate());
 });
 
+test('test isAffirmative() method', function (): void {
+    $this->assertTrue(Strings::create('true')->isAffirmative());
+    $this->assertTrue(Strings::create('yes')->isAffirmative());
+    $this->assertTrue(Strings::create('t')->isAffirmative());
+    $this->assertTrue(Strings::create('y')->isAffirmative());
+    $this->assertTrue(Strings::create('ok')->isAffirmative());
+    $this->assertTrue(Strings::create('okay')->isAffirmative());
+});
 
 test('test isLower() method', function (): void {
     $this->assertTrue(Strings::create('fòôbàřs')->isLower());
@@ -768,6 +776,13 @@
     $this->assertTrue(Strings::create('19FDE')->isHexadecimal());
 });
 
+test('test isHexColor() method', function (): void {
+    $this->assertTrue(Strings::create('#333')->isHexColor());
+    $this->assertFalse(Strings::create('#3333')->isHexColor());
+    $this->assertTrue(Strings::create('fff')->isHexColor());
+    $this->assertFalse(Strings::create('fffff')->isHexColor());
+});
+
 test('test isPrintable() method', function (): void {
     $this->assertTrue(Strings::create('fòôbàřs')->isPrintable());
     $this->assertTrue(Strings::create('19FDE')->isPrintable());