Adding a new scalar BigInt

README.md

@@ -81,10 +81,8 @@ class HexValue extends Regex
 {
     /**
      * The description that is used for schema introspection.
-     *
-     * @var string
      */
-    public $description = <<<'DESCRIPTION'
+    public ?string $description = <<<'DESCRIPTION'
 A hexadecimal color is specified with: `#RRGGBB`, where `RR` (red), `GG` (green) and `BB` (blue)
 are hexadecimal integers between `00` and `FF` specifying the intensity of the color.
 DESCRIPTION;

src/BigInt.php

@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+
+namespace MLL\GraphQLScalars;
+
+class BigInt extends Regex
+{
+    public ?string $description = <<<'DESCRIPTION'
+A hexadecimal color is specified with: `#RRGGBB`, where `RR` (red), `GG` (green) and `BB` (blue)
+are hexadecimal integers between `00` and `FF` specifying the intensity of the color.
+DESCRIPTION;
+
+    public static function regex(): string
+    {
+        return "/\d+/";
+    }
+}

tests/BigIntTest.php

@@ -0,0 +1,42 @@
+<?php declare(strict_types=1);
+
+namespace MLL\GraphQLScalars\Tests;
+
+use GraphQL\Error\Error;
+use GraphQL\Error\InvariantViolation;
+use GraphQL\Language\AST\StringValueNode;
+use MLL\GraphQLScalars\BigInt;
+use MLL\GraphQLScalars\Email;
+use PHPUnit\Framework\TestCase;
+
+final class BigIntTest extends TestCase
+{
+    public function testSerializeThrowsIfBigIntIsInvalid(): void
+    {
+        $bigInt = new BigInt();
+
+        $this->expectExceptionObject(new InvariantViolation('The given value "foo" did not match the regex /\d+/.'));
+        $bigInt->serialize('foo');
+    }
+
+    public function testSerializePassesWhenBigIntIsValid(): void
+    {
+        $serializedResult = (new BigInt())->serialize(10000000000000);
+
+        self::assertSame("10000000000000", $serializedResult);
+    }
+
+    public function testSerializePassesWhenBigIntIsValidAsString(): void
+    {
+        $serializedResult = (new BigInt())->serialize("10000000000000");
+
+        self::assertSame("10000000000000", $serializedResult);
+    }
+
+    public function testParseBigIntIsValid(): void
+    {
+        $parsedResult = (new BigInt())->parseValue(10000000000000);
+
+        self::assertSame("10000000000000", $parsedResult);
+    }
+}