Update two more headers to return string value: Accept-Range and Age

Author: michalbundyra

src/Header/AcceptRanges.php

@@ -27,14 +27,12 @@ public static function fromString($headerLine)
             );
         }
 
-        $header = new static($value);
-
-        return $header;
+        return new static($value);
     }
 
     public function __construct($rangeUnit = null)
     {
-        if ($rangeUnit) {
+        if ($rangeUnit !== null) {
             $this->setRangeUnit($rangeUnit);
         }
     }
@@ -58,7 +56,7 @@ public function setRangeUnit($rangeUnit)
 
     public function getRangeUnit()
     {
-        return $this->rangeUnit;
+        return (string) $this->rangeUnit;
     }
 
     public function toString()

src/Header/Age.php

@@ -37,14 +37,12 @@ public static function fromString($headerLine)
             throw new Exception\InvalidArgumentException('Invalid header line for Age string: "' . $name . '"');
         }
 
-        $header = new static($value);
-
-        return $header;
+        return new static($value);
     }
 
     public function __construct($deltaSeconds = null)
     {
-        if ($deltaSeconds) {
+        if ($deltaSeconds !== null) {
             $this->setDeltaSeconds($deltaSeconds);
         }
     }
@@ -62,11 +60,11 @@ public function getFieldName()
     /**
      * Get header value (number of seconds)
      *
-     * @return int
+     * @return string
      */
     public function getFieldValue()
     {
-        return $this->getDeltaSeconds();
+        return (string) $this->getDeltaSeconds();
     }
 
     /**

test/HeaderTest.php

@@ -16,6 +16,7 @@ class HeaderTest extends TestCase
     public function header()
     {
         // @codingStandardsIgnoreStart
+        yield Header\AcceptRanges::class            => [Header\AcceptRanges::class, 'Accept-Ranges'];
         yield Header\AuthenticationInfo::class      => [Header\AuthenticationInfo::class, 'Authentication-Info'];
         yield Header\Authorization::class           => [Header\Authorization::class, 'Authorization'];
         yield Header\ContentDisposition::class      => [Header\ContentDisposition::class, 'Content-Disposition'];