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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
#if NET
using System;
using System.Threading.Tasks;
using IronPython.Hosting;
using IronPython.Runtime;
using Microsoft.Scripting.Hosting;
using NUnit.Framework;
namespace IronPythonTest {
public class CoroutineAsTaskTest {
private readonly ScriptEngine _engine;
private readonly ScriptScope _scope;
public CoroutineAsTaskTest() {
_engine = Python.CreateEngine();
_scope = _engine.CreateScope();
}
[Test]
public void AsTask_SimpleReturn() {
_engine.Execute(@"
async def foo():
return 42
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = coro.AsTask().GetAwaiter().GetResult();
Assert.That(result, Is.EqualTo(42));
}
[Test]
public void AsTask_StringReturn() {
_engine.Execute(@"
async def foo():
return 'hello'
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = coro.AsTask().GetAwaiter().GetResult();
Assert.That(result, Is.EqualTo("hello"));
}
[Test]
public void AsTask_AwaitCompletedTask() {
_engine.Execute(@"
from System.Threading.Tasks import Task
async def foo():
val = await Task.FromResult(10)
return val + 5
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = coro.AsTask().GetAwaiter().GetResult();
Assert.That(result, Is.EqualTo(15));
}
[Test]
public void AsTask_AwaitRealAsync() {
_engine.Execute(@"
from System.Threading.Tasks import Task
async def foo():
await Task.Delay(50)
return 'delayed'
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = coro.AsTask().GetAwaiter().GetResult();
Assert.That(result, Is.EqualTo("delayed"));
}
[Test]
public async Task AsTask_CanBeAwaited() {
_engine.Execute(@"
from System.Threading.Tasks import Task
async def foo():
await Task.Delay(50)
return 99
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = await coro.AsTask();
Assert.That(result, Is.EqualTo(99));
}
[Test]
public void AsTask_PropagatesException() {
_engine.Execute(@"
async def foo():
raise ValueError('boom')
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
Assert.Throws<AggregateException>(() => coro.AsTask().Wait());
}
[Test]
public void AsTask_MultipleAwaits() {
_engine.Execute(@"
from System.Threading.Tasks import Task
async def foo():
a = await Task.FromResult(10)
b = await Task.FromResult(20)
return a + b
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = coro.AsTask().GetAwaiter().GetResult();
Assert.That(result, Is.EqualTo(30));
}
[Test]
public void AsTask_NoneReturn() {
_engine.Execute(@"
async def foo():
pass
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = coro.AsTask().GetAwaiter().GetResult();
Assert.That(result, Is.Null);
}
[Test]
public async Task DirectAwait_Simple() {
_engine.Execute(@"
async def foo():
return 42
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = await coro;
Assert.That(result, Is.EqualTo(42));
}
[Test]
public async Task DirectAwait_WithRealAsync() {
_engine.Execute(@"
from System.Threading.Tasks import Task
async def foo():
await Task.Delay(50)
return 'done'
coro = foo()
", _scope);
var coro = (PythonCoroutine)_scope.GetVariable("coro");
var result = await coro;
Assert.That(result, Is.EqualTo("done"));
}
}
}
#endif