f - add parses_invoice_request_without_signature test

Author: jkczyz

lightning/src/offers/invoice_request.rs

@@ -1098,6 +1098,22 @@ mod tests {
 		}
 	}
 
+	#[test]
+	fn parses_invoice_request_without_signature() {
+		let mut buffer = Vec::new();
+		OfferBuilder::new("foo".into(), recipient_pubkey())
+			.amount_msats(1000)
+			.build().unwrap()
+			.request_invoice(vec![1; 32], payer_pubkey())
+			.build().unwrap()
+			.invoice_request
+			.write(&mut buffer).unwrap();
+
+		if let Err(e) = InvoiceRequest::try_from(buffer) {
+			panic!("error parsing invoice_request: {:?}", e);
+		}
+	}
+
 	#[test]
 	fn fails_parsing_invoice_request_with_invalid_signature() {
 		let mut invoice_request = OfferBuilder::new("foo".into(), recipient_pubkey())