From 686c763a1605dd7c5aa67770a5e78fedb5b26888 Mon Sep 17 00:00:00 2001
From: grpaiva <gustavorpaiva@gmail.com>
Date: Thu, 15 Aug 2019 16:59:04 -0300
Subject: [PATCH] adds special characters compatibility

---
 src/Filters/Capitalize.php       |  2 +-
 src/Filters/Lowercase.php        |  2 +-
 src/Filters/Uppercase.php        |  2 +-
 tests/Filters/CapitalizeTest.php |  9 +++++++++
 tests/Filters/LowercaseTest.php  | 15 +++++++++++++++
 tests/Filters/UppercaseTest.php  | 15 +++++++++++++++
 6 files changed, 42 insertions(+), 3 deletions(-)

diff --git a/src/Filters/Capitalize.php b/src/Filters/Capitalize.php
index 3407d3e..8fce5a7 100644
--- a/src/Filters/Capitalize.php
+++ b/src/Filters/Capitalize.php
@@ -14,6 +14,6 @@ class Capitalize implements Filter
      */
     public function apply($value, $options = [])
     {
-        return is_string($value) ? ucwords(strtolower($value)) : $value;
+        return is_string($value) ? mb_convert_case(mb_strtolower($value, 'UTF-8'),  MB_CASE_TITLE) : $value;
     }
 }
diff --git a/src/Filters/Lowercase.php b/src/Filters/Lowercase.php
index f577377..de4fbcd 100644
--- a/src/Filters/Lowercase.php
+++ b/src/Filters/Lowercase.php
@@ -14,6 +14,6 @@ class Lowercase implements Filter
      */
     public function apply($value, $options = [])
     {
-        return is_string($value) ? strtolower($value) : $value;
+        return is_string($value) ? mb_strtolower($value, 'UTF-8') : $value;
     }
 }
diff --git a/src/Filters/Uppercase.php b/src/Filters/Uppercase.php
index 7bcdc6a..7499e54 100644
--- a/src/Filters/Uppercase.php
+++ b/src/Filters/Uppercase.php
@@ -14,6 +14,6 @@ class Uppercase implements Filter
      */
     public function apply($value, $options = [])
     {
-        return is_string($value) ? strtoupper($value) : $value;
+        return is_string($value) ? mb_strtoupper($value) : $value;
     }
 }
diff --git a/tests/Filters/CapitalizeTest.php b/tests/Filters/CapitalizeTest.php
index 347ee06..8080444 100644
--- a/tests/Filters/CapitalizeTest.php
+++ b/tests/Filters/CapitalizeTest.php
@@ -24,4 +24,13 @@ public function it_capitalizes_strings()
         $result = $this->sanitize(['name' => ' jon snow 145'], ['name' => 'capitalize']);
         $this->assertEquals(' Jon Snow 145', $result['name']);
     }
+
+    /**
+     *  @test
+     */
+    public function it_capitalizes_special_characters()
+    {
+        $result = $this->sanitize(['name' => 'Τάχιστη αλώπηξ'], ['name' => 'capitalize']);
+        $this->assertEquals('Τάχιστη Αλώπηξ', $result['name']);
+    }
 }
diff --git a/tests/Filters/LowercaseTest.php b/tests/Filters/LowercaseTest.php
index d1ea301..e09d5ac 100644
--- a/tests/Filters/LowercaseTest.php
+++ b/tests/Filters/LowercaseTest.php
@@ -30,4 +30,19 @@ public function it_lowercases_strings()
         $data = $this->sanitize($data, $rules);
         $this->assertEquals('hello everybody', $data['name']);
     }
+
+    /**
+     *  @test
+     */
+    public function it_lowercases_special_characters_strings()
+    {
+        $data = [
+            'name' => 'Τάχιστη αλώπηξ',
+        ];
+        $rules = [
+            'name' => 'lowercase',
+        ];
+        $data = $this->sanitize($data, $rules);
+        $this->assertEquals('τάχιστη αλώπηξ', $data['name']);
+    }
 }
diff --git a/tests/Filters/UppercaseTest.php b/tests/Filters/UppercaseTest.php
index a78d198..f512493 100644
--- a/tests/Filters/UppercaseTest.php
+++ b/tests/Filters/UppercaseTest.php
@@ -30,4 +30,19 @@ public function it_uppercases_strings()
         $data = $this->sanitize($data, $rules);
         $this->assertEquals('HELLO EVERYBODY', $data['name']);
     }
+
+    /**
+     *  @test
+     */
+    public function it_uppercases_special_characters_strings()
+    {
+        $data = [
+            'name' => 'Τάχιστη αλώπηξ',
+        ];
+        $rules = [
+            'name' => 'uppercase',
+        ];
+        $data = $this->sanitize($data, $rules);
+        $this->assertEquals('ΤΆΧΙΣΤΗ ΑΛΏΠΗΞ', $data['name']);
+    }
 }