Fix failing unit tests, remove test cases added "for illustrative pur…

…poses".

README.md

@@ -121,6 +121,7 @@ weren't for the contributions of the following individuals:
 * [@asgrim (James Titcumb)](https://github.com/asgrim)
 * [@CodesInChaos (Christian Winnerlein)](https://github.com/CodesInChaos)
 * [@chriscct7 (Chris Christoff)](https://github.com/chriscct7)
+* [@cs278 (Chris Smith)](https://github.com/cs278)
 * [@cweagans (Cameron Eagans)](https://github.com/cweagans)
 * [@dd32 (Dion Hulse)](https://github.com/dd32)
 * [@geggleto (Glenn Eggleton)](https://github.com/geggleto)

lib/cast_to_int.php

@@ -73,4 +73,4 @@ function RandomCompat_intval($number, $fail_open = false)
             'Expected an integer.'
         );
     }
-}
+}

tests/unit/UtilityTest.php

@@ -3,25 +3,21 @@ class UtilityTest extends PHPUnit_Framework_TestCase
 {
     public function testStrlen()
     {
-        $this->assertEquals(RandomCompat_strlen("\xF0\x9D\x92\xB3"), 4);
-
-        // To help illustrate the difference
-        if (
-            defined('MB_OVERLOAD_STRING') &&
-            ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
-        ) {
-            $this->assertTrue(
-                strlen("\xF0\x9D\x92\xB3") === 1
-            );
-        } else {
-            $this->assertTrue(
-                strlen("\xF0\x9D\x92\xB3") === 4
+        if (!function_exists('RandomCompat_strlen')) {
+            return $this->markTestSkipped(
+                'We don\' need to test this in PHP 7.'
             );
         }
+        $this->assertEquals(RandomCompat_strlen("\xF0\x9D\x92\xB3"), 4);
     }
 
     public function testIntval()
     {
+        if (!function_exists('RandomCompat_intval')) {
+            return $this->markTestSkipped(
+                'We don\' need to test this in PHP 7.'
+            );
+        }
         // Equals
         $this->assertEquals(
             abs(RandomCompat_intval(-4.5)),