Allow resolving absolute host against IANA list

Author: nyamsprod

src/TopLevelDomains.php

@@ -11,7 +11,6 @@
 use Stringable;
 
 use function count;
-use function in_array;
 use function preg_match;
 use function trim;
 
@@ -172,7 +171,7 @@ public function resolve($host): ResolvedDomainName
     {
         try {
             $domain = $this->validateDomain($host);
-            if ($this->containsTopLevelDomain($domain)) {
+            if ($this->containsTopLevelDomain($domain->withoutRootLabel())) {
                 return ResolvedDomain::fromIANA($domain);
             }
             return ResolvedDomain::fromUnknown($domain);
@@ -199,8 +198,7 @@ private function validateDomain(int|DomainNameProvider|Host|string|Stringable|nu
             $domain = Domain::fromIDNA2008($domain);
         }
 
-        $label = $domain->label(0);
-        if (in_array($label, [null, ''], true)) {
+        if (null === $domain->label(0)) {
             throw UnableToResolveDomain::dueToUnresolvableDomain($domain);
         }
 
@@ -212,13 +210,10 @@ private function containsTopLevelDomain(DomainName $domain): bool
         return isset($this->records[$domain->toAscii()->label(0)]);
     }
 
-    /**
-     * @param int|DomainNameProvider|Host|string|Stringable|null $host a domain in a type that can be converted into a DomainInterface instance
-     */
-    public function getIANADomain($host): ResolvedDomainName
+    public function getIANADomain(DomainNameProvider|Host|Stringable|string|int|null $host): ResolvedDomainName
     {
         $domain = $this->validateDomain($host);
-        if (!$this->containsTopLevelDomain($domain)) {
+        if (!$this->containsTopLevelDomain($domain->withoutRootLabel())) {
             throw UnableToResolveDomain::dueToMissingSuffix($domain, 'IANA');
         }
 

src/TopLevelDomainsTest.php

@@ -9,7 +9,6 @@
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 use Stringable;
-use TypeError;
 
 use function dirname;
 
@@ -187,13 +186,6 @@ public function __toString(): string
         ];
     }
 
-    public function testTopLevelDomainThrowsTypeError(): void
-    {
-        $this->expectException(TypeError::class);
-
-        self::$topLevelDomains->getIANADomain(new DateTimeImmutable()); /* @phpstan-ignore-line */
-    }
-
     public function testTopLevelDomainWithInvalidDomain(): void
     {
         $this->expectException(SyntaxError::class);
@@ -212,8 +204,8 @@ public function testResolveWithAbsoluteDomainName(): void
     {
         $result = self::$topLevelDomains->resolve('example.com.');
         self::assertSame('example.com.', $result->value());
-        self::assertFalse($result->suffix()->isIANA());
-        self::assertNull($result->suffix()->value());
+        self::assertTrue($result->suffix()->isIANA());
+        self::assertSame('com', $result->suffix()->value());
     }
 
     public function testTopLevelDomainWithUnResolvableDomain(): void
@@ -223,6 +215,13 @@ public function testTopLevelDomainWithUnResolvableDomain(): void
         self::$topLevelDomains->getIANADomain('localhost');
     }
 
+    public function testTopLevelDomainWithUnResolvableDomain2(): void
+    {
+        $this->expectException(UnableToResolveDomain::class);
+
+        self::$topLevelDomains->getIANADomain('localhost.');
+    }
+
     public function testResolveWithUnResolvableDomain(): void
     {
         $result = self::$topLevelDomains->resolve('localhost');