public void IsAsync()
{
IMethodInvocation methodInvocation = null;
Should.Throw <ArgumentNullException>(() => methodInvocation.IsAsync());
methodInvocation = Substitute.For <IMethodInvocation>();
methodInvocation.Configure().Method.Returns(((Func <Task <int> >)(() => Task.FromResult(1))).Method);
Should.NotThrow(() => methodInvocation.IsAsync()).ShouldBeTrue();
methodInvocation.Configure().Method.Returns(((Func <int>)(() => 1)).Method);
methodInvocation.Configure().ReturnValue.Returns(Task.FromResult(1));
Should.NotThrow(() => methodInvocation.IsAsync()).ShouldBeTrue();
methodInvocation.Configure().ReturnValue.Returns(1);
Should.NotThrow(() => methodInvocation.IsAsync()).ShouldBeFalse();
methodInvocation.Configure().ReturnValue.Returns(Task.CompletedTask);
Should.NotThrow(() => methodInvocation.IsAsync()).ShouldBeTrue();
methodInvocation.Configure().ReturnValue.Returns(new ValueTask <int>(1));
Should.NotThrow(() => methodInvocation.IsAsync()).ShouldBeTrue();
methodInvocation.Configure().ReturnValue.Returns(new ValueTask());
Should.NotThrow(() => methodInvocation.IsAsync()).ShouldBeTrue();
}
