First set of tests, argument unwrapping/injection

examples/local.php

@@ -9,6 +9,7 @@ use React\EventLoop\Loop;
 use React\Promise\Promise;
 
 $commands = new CommandRegistry();
+
 // Register some function to call. The name here is "hello", and it will
 // receive a Context holding the call context. Any passed data will be
 // available as properties on the Context object.
@@ -21,23 +22,28 @@ $commands->register("hello", function (Context $context) {
         });
     });
 });
-$commands->register("hello2", function (Context $context) {
+
+// Note how the arguments can be unwrapped. You can still add Context as
+// an argument to get the full context. Values will be cast to match the
+// type, so keep this in mind when feeding strings like 'false' into a
+// boolean argument. It is also a good idea to make the arguments nullable.
+$commands->register("hello2", function (?string $name, ?string $phrase, ?string $missing) {
     // Just returning the value works just fine!
-    return "Hello2, {$context->name}";
+    return "Greetings, {$name}. {$phrase} to you too!";
 });
 
 // Create the bus
 $bus = new CommandBus($commands);
 
 // And execute some commands!
-$bus->execute('hello', ['name'=>'Bob'])->then(
-    function ($result) {
+$bus->execute('hello', ['name'=>'Bob'])
+    ->then(function ($result) {
         var_dump($result);
     }
 );
 
-$bus->execute('hello2', ['name'=>'Bob'])->then(
-    function ($result) {
+$bus->execute('hello2', ['name'=>'Bob','phrase'=>'Good day'])
+    ->then(function ($result) {
         var_dump($result);
     }
 );