smoke-tests: showcase the usage of async decorator

When async decorator and async metadata is used,
then additional suspending overload is generated.

Signed-off-by: Patryk Wrobel <183546751+pwrobeldev@users.noreply.github.com>

Author: pwrobeldev

gluecodium/src/main/resources/templates/kotlin/KotlinSuspendingFunction.mustache

@@ -28,9 +28,9 @@ suspend fun {{resolveName}}({{!!
 }}{{/asyncFunctionDecorator.inputParameters}}) { {{#asyncFunctionDecorator.asyncCallback.parameters}}{{resolveName}}{{#if iter.hasNext}}, {{/if}}{{!!
 }}{{/asyncFunctionDecorator.asyncCallback.parameters}} ->
         if ({{resolveName asyncFunctionDecorator.asyncCallback.errorField}} != null) {
-            continuation.resumeWithException(Exception({{resolveName asyncFunctionDecorator.asyncCallback.errorField}}))
+            continuation.resumeWithException(Exception({{resolveName asyncFunctionDecorator.asyncCallback.errorField}}.toString()))
         } else {
-            continuation.resume({{resolveName asyncFunctionDecorator.asyncCallback.resultFields.0}})
+            continuation.resume({{resolveName asyncFunctionDecorator.asyncCallback.resultFields.0}}!!)
         }
     }
 

gluecodium/src/test/resources/smoke/async_decorators/input/AsyncDecorator.lime

@@ -45,12 +45,14 @@ enum EngineError {
 // Outcome of engine work is list of strings.
 // @param[engineError] The error in case of a failure. It is `null` for an operation that succeeds.
 // @param[engineResult] The result from engine. It is `null` in case of an error.
+@AsyncCallbackMetadata(ErrorField="engineError")
 lambda EngineWorkCompletedCallback = (engineError: EngineError?, engineResult: List<String>?) -> Void
 
 // An engine class, which offers users some asynchronous processing.
 class CoolEngine {
     // A function, which downloads some 'cool labels' from the given url.
     // When it finishes, the 'callback' is called.
     // It returns the 'AsyncTaskHandle' which allows checking the status and cancelling the async task.
+    @AsyncDecorator(CancelFunction="cancel")
     fun downloadCoolLabelsAsync(url: String, callback: EngineWorkCompletedCallback): AsyncTaskHandle
 }

gluecodium/src/test/resources/smoke/async_decorators/output/android-kotlin/com/example/smoke/CoolEngine.kt

@@ -9,6 +9,9 @@
 package com.example.smoke
 
 import com.example.NativeBase
+import kotlin.coroutines.resume
+import kotlin.coroutines.resumeWithException
+import kotlinx.coroutines.suspendCancellableCoroutine
 
 /**
  * An engine class, which offers users some asynchronous processing.
@@ -39,6 +42,18 @@ class CoolEngine : NativeBase {
 
     external fun downloadCoolLabelsAsync(url: String, callback: EngineWorkCompletedCallback) : AsyncTaskHandle
 
+    suspend fun downloadCoolLabelsAsync(url: String): List<String> = suspendCancellableCoroutine { continuation ->
+        val asyncTaskHandle = downloadCoolLabelsAsync(url) { engineError, engineResult ->
+            if (engineError != null) {
+                continuation.resumeWithException(Exception(engineError.toString()))
+            } else {
+                continuation.resume(engineResult!!)
+            }
+        }
+
+        continuation.invokeOnCancellation { asyncTaskHandle.cancel() }
+    }
+