Implement isParsable static method

README.md

@@ -73,12 +73,15 @@ All validating methods:
 - `Isbn::validateAsIsbn10`
 - `Isbn::validateAsIbsn13`
 - `Isbn::validateAsEan13`
+- `Isbn::isParsable`
+
+[Learn more about validating ISBNs](https://github.com/biblys/isbn/wiki/Validating-ISBNs-using-the-new-public-API)
 
 ## Development
 
 ### Using Gitpod
 
-You can start a dev environnement by clicking 
+You can start a dev environnement by clicking
 [![Gitpod ready-to-code](https://img.shields.io/badge/Gitpod-ready--to--code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/biblys/isbn)
 and start hacking in your browser right away!
 

src/Biblys/Isbn/Isbn.php

@@ -146,6 +146,26 @@ static public function validateAsEan13(string $input): void
         }
     }
 
+    /**
+     * Checks that an input can be parsed (and thus, formatted) by the library
+     *
+     * // Returns false because string contains invalid characters
+     * Isbn::validateAsEan13("9782SPI258040");
+     *
+     * @param string $input A string to check for parsability
+     *
+     * @return boolean true if the input can be parsed
+     */
+    static public function isParsable(string $input): bool
+    {
+        try {
+            Parser::parse($input);
+            return true;
+        } catch (IsbnParsingException $exception) {
+            return false;
+        }
+    }
+
     /* Legacy non static properties and methods (backward compatibility) */
     // FIXME: deprecate and remove on next major version
 

tests/isParsableTest.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of the biblys/isbn package.
+ *
+ * (c) Clément Bourgoin
+ *
+ * This package is Open Source Software. For the full copyright and license
+ * information, please view the LICENSE file which was distributed with this
+ * source code.
+ */
+
+ini_set('display_errors', 1);
+ini_set('display_startup_errors', 1);
+error_reporting(E_ALL);
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use Biblys\Isbn\Isbn;
+use PHPUnit\Framework\TestCase;
+
+class testIsParsable extends TestCase
+{
+    public function testParsableIsbn()
+    {
+        $isParsable = Isbn::isParsable("9782207258040");
+
+        $this->assertTrue($isParsable);
+    }
+
+    public function testUnparsableIsbn()
+    {
+        $isParsable = Isbn::isParsable("9782SPI258040");
+
+        $this->assertFalse($isParsable);
+    }
+}