Add M-element

Author: tvdijen

src/XML/dsig11/M.php

@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XMLSecurity\XML\dsig11;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+/**
+ * Class representing a xenc:M element.
+ *
+ * @package simplesaml/xml-security
+ */
+final class M extends AbstractDsig11Element
+{
+    /**
+     * @param int $m
+     */
+    public function __construct(
+        protected int $m,
+    ) {
+        Assert::positiveInteger($m, SchemaViolationException::class);
+    }
+
+
+    /**
+     * @return int
+     */
+    public function getM(): int
+    {
+        return $this->m;
+    }
+
+
+    /**
+     * Convert XML into a class instance
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   If the qualified name of the supplied element is wrong
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+        Assert::numeric($xml->textContent);
+
+        return new static(intval($xml->textContent));
+    }
+
+
+    /**
+     * Convert this element to XML.
+     *
+     * @param \DOMElement|null $parent The element we should append this element to.
+     * @return \DOMElement
+     */
+    public function toXML(?DOMElement $parent = null): DOMElement
+    {
+        $e = $this->instantiateParentElement($parent);
+        $e->textContent = strval($this->getM());
+
+        return $e;
+    }
+}

tests/XML/dsig11/MTest.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XMLSecurity\Test\XML\dsig11;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\XML\DOMDocumentFactory;
+use SimpleSAML\XML\TestUtils\SerializableElementTestTrait;
+use SimpleSAML\XMLSecurity\XML\dsig11\AbstractDsig11Element;
+use SimpleSAML\XMLSecurity\XML\dsig11\M;
+
+use function dirname;
+use function strval;
+
+/**
+ * Class \SimpleSAML\XMLSecurity\Test\XML\dsig11\MTest
+ *
+ * @package simplesamlphp/xml-security
+ */
+#[CoversClass(AbstractDsig11Element::class)]
+#[CoversClass(M::class)]
+final class MTest extends TestCase
+{
+    use SerializableElementTestTrait;
+
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$testedClass = M::class;
+
+        self::$xmlRepresentation = DOMDocumentFactory::fromFile(
+            dirname(__FILE__, 3) . '/resources/xml/dsig11_M.xml',
+        );
+    }
+
+
+    /**
+     */
+    public function testMarshalling(): void
+    {
+        $m = new M(1024);
+
+        $this->assertEquals(
+            self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
+            strval($m),
+        );
+    }
+}

tests/resources/xml/dsig11_M.xml

@@ -0,0 +1 @@
+<dsig11:M xmlns:dsig11="http://www.w3.org/2009/xmldsig11#">1024</dsig11:M>