Allow a `null` result (#77)
Fixes #76
Add missing nullable annotation on the `result` variable and a test
which fails if the variable is non-nullable.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b3c860..6a819f8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.0.1-dev
+
+* Fix a bug where a `null` result to a request caused an exception.
+
## 3.0.0
* Migrate to null safety.
diff --git a/lib/src/server.dart b/lib/src/server.dart
index a2b4dc1..ac34edf 100644
--- a/lib/src/server.dart
+++ b/lib/src/server.dart
@@ -201,7 +201,7 @@
var method = _methods[name];
method ??= _tryFallbacks;
- Object result;
+ Object? result;
if (method is ZeroArgumentFunction) {
if (request.containsKey('params')) {
throw RpcException.invalidParams('No parameters are allowed for '
diff --git a/test/server/server_test.dart b/test/server/server_test.dart
index 14ae1e4..8213ee7 100644
--- a/test/server/server_test.dart
+++ b/test/server/server_test.dart
@@ -44,6 +44,15 @@
completion(equals({'jsonrpc': '2.0', 'result': 'foo', 'id': 1234})));
});
+ test('Allows a `null` result', () {
+ controller.server.registerMethod('foo', () => null);
+
+ expect(
+ controller
+ .handleRequest({'jsonrpc': '2.0', 'method': 'foo', 'id': 1234}),
+ completion(equals({'jsonrpc': '2.0', 'result': null, 'id': 1234})));
+ });
+
test('a method that takes no parameters rejects parameters', () {
controller.server.registerMethod('foo', () => 'foo');
