IHF: str_upper tests added.

Author: dmitry-ivanov

tests/StrLowerTest.php

@@ -21,7 +21,7 @@ public function it_lowers_mixed_word()
     }
 
     /** @test */
-    public function it_lowers_uppercase_word()
+    public function it_lowers_uppercased_word()
     {
         $this->assertEquals('test', str_lower('TEST'));
     }
@@ -39,7 +39,7 @@ public function it_lowers_mixed_sentence()
     }
 
     /** @test */
-    public function it_lowers_uppercase_sentence()
+    public function it_lowers_uppercased_sentence()
     {
         $this->assertEquals('another test', str_lower('ANOTHER TEST'));
     }

tests/StrUpperTest.php

@@ -0,0 +1,52 @@
+<?php
+
+class StrUpperTest extends TestCase
+{
+    /** @test */
+    public function it_works_with_an_empty_string()
+    {
+        $this->assertEquals('', str_upper(''));
+    }
+
+    /** @test */
+    public function it_uppers_capitalized_word()
+    {
+        $this->assertEquals('TEST', str_upper('Test'));
+    }
+
+    /** @test */
+    public function it_uppers_mixed_word()
+    {
+        $this->assertEquals('TEST', str_upper('TeSt'));
+    }
+
+    /** @test */
+    public function it_uppers_lowercased_word()
+    {
+        $this->assertEquals('TEST', str_upper('test'));
+    }
+
+    /** @test */
+    public function it_uppers_capitalized_sentence()
+    {
+        $this->assertEquals('ANOTHER TEST', str_upper('Another Test'));
+    }
+
+    /** @test */
+    public function it_uppers_mixed_sentence()
+    {
+        $this->assertEquals('ANOTHER TEST', str_upper('AnoTHer TeST'));
+    }
+
+    /** @test */
+    public function it_uppers_lowercased_sentence()
+    {
+        $this->assertEquals('ANOTHER TEST', str_upper('another test'));
+    }
+
+    /** @test */
+    public function it_uppers_mixed_sentence_with_special_chars()
+    {
+        $this->assertEquals('ANOTHER-TEST!', str_upper('AnoTHer-TeST!'));
+    }
+}