Cleaned up some unused use statements, added code coverage script. 79% covered already

.gitignore

@@ -1,3 +1,4 @@
 .DS_Store
 vendor
-tests/tmp/*
+tests/tmp/*
+tests/coverage

run_coverage.sh

@@ -0,0 +1 @@
+XDEBUG_MODE=coverage  ./vendor/bin/phpunit tests --coverage-filter src --coverage-html tests/coverage

src/Server.php

@@ -139,6 +139,8 @@ class Server {
 		if (!is_callable($httpGetWithEffectiveUrl)) {
 			if (class_exists('\GuzzleHttp\Client')) {
 				$httpGetWithEffectiveUrl = function (string $uri) {
+					// This code can’t be tested, ignore it for coverage purposes.
+					// @codeCoverageIgnoreStart
 					$resp = (new \GuzzleHttp\Client([
 						\GuzzleHttp\RequestOptions::ALLOW_REDIRECTS => [
 							'max' => 10,
@@ -152,6 +154,7 @@ class Server {
 					$effectiveUrl = empty($rdh) ? $uri : array_values($rdh)[count($rdh) - 1];
 
 					return [$resp, $effectiveUrl];
+					// @codeCoverageIgnoreEnd
 				};
 			} else {
 				throw new Exception('No valid $httpGetWithEffectiveUrl was provided, and guzzlehttp/guzzle was not installed. Either require guzzlehttp/guzzle, or provide a valid callable.');
@@ -255,8 +258,10 @@ class Server {
 								// In theory this code should never be reached, as we already checked the request for valid parameters.
 								// However, it’s possible for hashAuthorizationRequestParameters() to return null, and if for whatever
 								// reason it does, the library should handle that case as elegantly as possible.
+								// @codeCoverageIgnoreStart
 								$this->logger->warning("Calculating the expected hash for an authorization approval request failed. This SHOULD NOT happen; if you encounter this error please contact the maintainers of taproot/indieauth.");
 								throw IndieAuthException::create(IndieAuthException::REQUEST_MISSING_PARAMETER, $request);
+								// @codeCoverageIgnoreEnd
 							}
 							
 							if (!array_key_exists(self::HASH_QUERY_STRING_KEY, $queryParams)) {

src/functions.php

@@ -3,17 +3,16 @@
 namespace Taproot\IndieAuth;
 
 use Exception;
-use IndieAuth\Client;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Log\LoggerAwareInterface;
 use Psr\Log\LoggerInterface;
 
-use function BarnabyWalters\Mf2\parseUrl;
-
 // From https://github.com/indieweb/indieauth-client-php/blob/main/src/IndieAuth/Client.php, thanks aaronpk.
 function generateRandomString($numBytes) {
 	if (function_exists('random_bytes')) {
 		$bytes = random_bytes($numBytes);
+		// We can’t easily test the following code.
+		// @codeCoverageIgnoreStart
 	} elseif (function_exists('openssl_random_pseudo_bytes')){
 		$bytes = openssl_random_pseudo_bytes($numBytes);
 	} else {
@@ -21,6 +20,7 @@ function generateRandomString($numBytes) {
 		for($i=0, $bytes=''; $i < $numBytes; $i++) {
 			$bytes .= chr(mt_rand(0, 255));
 		}
+		// @codeCoverageIgnoreEnd
 	}
 	return bin2hex($bytes);
 }

tests/ServerTest.php

@@ -6,15 +6,11 @@ use Exception;
 use Nyholm\Psr7\Response;
 use Nyholm\Psr7\ServerRequest;
 use Nyholm\Psr7\Request;
-use PDO;
 use PHPUnit\Framework\TestCase;
-use Psr\Http\Message\RequestInterface;
-use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Taproot\IndieAuth\Callback\DefaultAuthorizationForm;
 use Taproot\IndieAuth\Callback\SingleUserPasswordAuthenticationCallback;
 use Taproot\IndieAuth\IndieAuthException;
-use Taproot\IndieAuth\Middleware\NoOpMiddleware;
 use Taproot\IndieAuth\Server;
 use Taproot\IndieAuth\Storage\FilesystemJsonStorage;