Add static constructors + tests

Author: haampie

src/Parser.php

@@ -24,6 +24,28 @@ public function __construct($headers = null, $options = [])
         }
     }
 
+    /**
+     * Create a new Parser instance from a user agent string
+     *
+     * @param  string   $agent     Required, a string containing the raw User-Agent
+     * @param  array    $options   Optional, an array with configuration options
+     */
+    public static function fromUserAgent($agent, array $options = [])
+    {
+        return new static($agent, $options);
+    }
+
+    /**
+     * Create a new Parser instance from a user agent string
+     *
+     * @param  array    $headers    Required, an array with all of the headers
+     * @param  array    $options    Optional, an array with configuration options
+     */
+    public static function fromHeaders(array $headers, array $options = [])
+    {
+        return new static($headers, $options);
+    }
+
     /**
      * Analyse the provided headers or User-Agent string
      *

tests/unit/ParserTest.php

@@ -40,10 +40,27 @@ public function testCreatingParserWithoutArgumentsAndCallAnalyse()
     {
         $parser = new Parser();
         $parser->analyse("Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; InfoPath.1)");
-        
+
+        $this->assertTrue($parser->isBrowser('Internet Explorer', '=', '6.0'));
+    }
+
+    public function testCreatingParserFromUserAgent()
+    {
+        $parser = Parser::fromUserAgent('Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; InfoPath.1)');
+
         $this->assertTrue($parser instanceof \WhichBrowser\Parser);
 
         $this->assertTrue($parser->isBrowser('Internet Explorer', '=', '6.0'));
     }
 
+    public function testCreatingParserFromHeaderArray()
+    {
+        $parser = Parser::fromHeaders([
+            'User-Agent' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; InfoPath.1)'
+        ]);
+
+        $this->assertTrue($parser instanceof \WhichBrowser\Parser);
+
+        $this->assertTrue($parser->isBrowser('Internet Explorer', '=', '6.0'));
+    }
 }