add AsyncMysqlQueryErrorResult and SQLFakeAsyncMysqlException (#110)

src/AsyncMysql/AsyncMysqlQueryErrorResult.hack

@@ -0,0 +1,20 @@
+namespace Slack\SQLFake;
+
+<<__MockClass>>
+final class AsyncMysqlQueryErrorResult extends \AsyncMysqlQueryErrorResult {
+
+	/* HH_IGNORE_ERROR[3012] I don't want to call parent::construct */
+	public function __construct(private int $mysql_errno = 1105, private string $mysql_error = 'ERUnknownError') {}
+
+	<<__Override>>
+	// HHAST_IGNORE_ERROR[CamelCasedMethodsUnderscoredFunctions]
+	public function mysql_errno(): int {
+		return $this->mysql_errno;
+	}
+
+	<<__Override>>
+	// HHAST_IGNORE_ERROR[CamelCasedMethodsUnderscoredFunctions]
+	public function mysql_error(): string {
+		return $this->mysql_error;
+	}
+}

src/Exception.php

@@ -8,3 +8,11 @@ final class SQLFakeParseException extends SQLFakeException {}
 final class SQLFakeRuntimeException extends SQLFakeException {}
 final class SQLFakeUniqueKeyViolation extends SQLFakeException {}
 final class SQLFakeVitessQueryViolation extends SQLFakeException {}
+final class SQLFakeAsyncMysqlException extends SQLFakeException {
+	public function __construct(private \AsyncMysqlErrorResult $result) {
+		parent::__construct();
+	}
+	public function getResult(): \AsyncMysqlErrorResult {
+		return $this->result;
+	}
+}