public async Task Awaiting_Result_Iterates_Source()
{
var target = new ThrowingAsyncEnumerable <int>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await target.SingleOrDefault();
});
}
public async Task Awaiting_Result_Iterates_Source_Task_Predicate()
{
var target = new ThrowingAsyncEnumerable <bool>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await target.SingleOrDefault(QuickFunctions <bool> .IdentityTasked);
});
}
public void Eagerly_Validates_Source()
{
var target = new ThrowingAsyncEnumerable <int>();
Assert.Throws <ArgumentNullException>(() =>
{
var iter = AsyncEnumerable.Cast <int, object>((IAsyncEnumerable <int>)null);
});
}
public async Task Awaiting_Result_Starts_Iteration_No_Predicate()
{
var target = new ThrowingAsyncEnumerable <long>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await target.LongCount();
});
}
public async Task Awaiting_Result_Starts_Iteration_Plain_Predicate()
{
var target = new ThrowingAsyncEnumerable <bool>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await target.LongCount(QuickFunctions <bool> .Identity);
});
}
public void Eager_Validation_Task()
{
var target = new ThrowingAsyncEnumerable <int>();
Assert.Throws <ArgumentNullException>(() =>
{
var iter = AsyncEnumerable.Append(target, (Task <int>)null);
});
}
public void Eager_Validation_Source_ValueTaskPredicate()
{
var target = new ThrowingAsyncEnumerable <bool>();
Assert.Throws <ArgumentNullException>(() =>
{
var noIterate = AsyncEnumerable.Any((IAsyncEnumerable <bool>)null, QuickFunctions <bool> .IdentityWrapped);
});
}
public async Task Awaiting_Task_Forces_Iteration()
{
var target = new ThrowingAsyncEnumerable <bool>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
var all = await target.Any(QuickFunctions <bool> .Identity);
});
}
public void Eager_Validation_Predicate_ValueTaskPredicate()
{
var target = new ThrowingAsyncEnumerable <bool>();
Assert.Throws <ArgumentNullException>(() =>
{
var noIterate = AsyncEnumerable.Any(target, (Func <bool, ValueTask <bool> >)null);
});
}
public void Eager_Validation_Source_NoPredicate()
{
var target = new ThrowingAsyncEnumerable <bool>();
Assert.Throws <ArgumentNullException>(() =>
{
var noIterate = AsyncEnumerable.Any((IAsyncEnumerable <bool>)null);
});
}
public async Task Awaiting_Causes_Iteration()
{
var target = new ThrowingAsyncEnumerable <int>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await using (var items = AsyncEnumerable.Cast <int, object>(target).GetAsyncEnumerator())
{
await items.MoveNextAsync();
}
});
}
public async Task Starting_Iteration_Iterates_Source()
{
var target = new ThrowingAsyncEnumerable <long>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await using (var iter = target.Distinct().GetAsyncEnumerator())
{
await iter.MoveNextAsync();
}
});
}
public async Task Starting_Iteration_Forces_Iteration()
{
var target = new ThrowingAsyncEnumerable <int>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await using (var iter = target.Append(0).GetAsyncEnumerator())
{
await iter.MoveNextAsync();
}
});
}
public async Task Starting_Iteration_Iterates_Source_Explicit()
{
var target = new ThrowingAsyncEnumerable <int>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await using (var iter = target.DefaultIfEmpty(19).GetAsyncEnumerator())
{
await iter.MoveNextAsync();
}
});
}
public async Task Starting_Iteration_Iterates_Source_Task_Selector()
{
var target = new ThrowingAsyncEnumerable <int>();
await using (var iter = target.Select(a => Task.FromResult(a)).GetAsyncEnumerator())
{
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await iter.MoveNextAsync();
});
}
}
public async Task Starting_Iteration_Iterates_Source_ValueTask_Selector_Indexer()
{
var target = new ThrowingAsyncEnumerable <int>();
await using (var iter = target.Select((a, i) => new ValueTask <int>(a)).GetAsyncEnumerator())
{
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await iter.MoveNextAsync();
});
}
}
public async Task Awaiting_Second_Causes_Iteration()
{
var first = AsyncEnumerable.Empty <int>();
var second = new ThrowingAsyncEnumerable <int>();
await Assert.ThrowsAsync <NotImplementedException>(async() =>
{
await using (var item = first.Concat(second).GetAsyncEnumerator())
{
await item.MoveNextAsync();
}
});
}
