Add type for xml:id attribute

Author: tvdijen

src/XML/Type/IDValue.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Type;
+
+use SimpleSAML\XML\Attribute;
+use SimpleSAML\XML\Constants as C;
+use SimpleSAML\XMLSchema\Type\Builtin\IDValue as BaseIDValue;
+use SimpleSAML\XMLSchema\Type\Helper\AttributeTypeInterface;
+
+/**
+ * @package simplesaml/xml-common
+ */
+class IDValue extends BaseIDValue implements AttributeTypeInterface
+{
+    /** @var string */
+    public const SCHEMA_TYPE = 'xs:ID';
+
+
+    /**
+     * Convert this value to an attribute
+     *
+     * @return \SimpleSAML\XML\Attribute
+     */
+    public function toAttribute(): Attribute
+    {
+        return new Attribute(C::NS_XML, 'xml', 'id', $this);
+    }
+}

tests/XML/Type/IDValueTest.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML\Type;
+
+use PHPUnit\Framework\Attributes\{CoversClass, DataProvider, DataProviderExternal, DependsOnClass};
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Test\XML\Assert\IDTest;
+use SimpleSAML\XML\Constants as C;
+use SimpleSAML\XML\Type\IDValue;
+use SimpleSAML\XMLSchema\Exception\SchemaViolationException;
+use SimpleSAML\XMLSchema\Type\Builtin\{IDValue as BaseIDValue, StringValue};
+
+/**
+ * Class \SimpleSAML\Test\XML\Type\IDValueTest
+ *
+ * @package simplesamlphp/xml-common
+ */
+#[CoversClass(IDValue::class)]
+final class IDValueTest extends TestCase
+{
+    /**
+     * @param boolean $shouldPass
+     * @param string $id
+     */
+    #[DataProviderExternal(IDTest::class, 'provideValidID')]
+    #[DependsOnClass(IDTest::class)]
+    public function testID(bool $shouldPass, string $id): void
+    {
+        try {
+            IDValue::fromString($id);
+            $this->assertTrue($shouldPass);
+        } catch (SchemaViolationException $e) {
+            $this->assertFalse($shouldPass);
+        }
+    }
+
+
+    /**
+     * Test helpers
+     */
+    public function testHelpers(): void
+    {
+        $id = IDValue::fromString('phpunit');
+        $attr = $id->toAttribute();
+
+        $this->assertEquals($attr->getNamespaceURI(), C::NS_XML);
+        $this->assertEquals($attr->getNamespacePrefix(), 'xml');
+        $this->assertEquals($attr->getAttrName(), 'id');
+        $this->assertEquals($attr->getAttrValue(), 'phpunit');
+    }
+}