public async Task ForEachAsync_WhenFuncIsNull_Throws()
{
var exception = await Assert.ThrowsAsync <ArgumentNullException>(
() => NuGetAsyncExtensions.ForEachAsync(Enumerable.Empty <string>(), maxDegreeOfParallelism: 2, func: null));
Assert.Equal("func", exception.ParamName);
}
public async Task ForEachAsync_WhenMaxDegreeOfParallelismIsLessThanOne_Throws(int maxDegreeOfParallelism)
{
var exception = await Assert.ThrowsAsync <ArgumentOutOfRangeException>(
() => NuGetAsyncExtensions.ForEachAsync(Enumerable.Empty <string>(), maxDegreeOfParallelism, func: _ => Task.FromResult(0)));
Assert.Equal("maxDegreeOfParallelism", exception.ParamName);
Assert.StartsWith($"The argument must be within the range from 1 (inclusive) to {int.MaxValue} (inclusive).", exception.Message);
}
public async Task ForEachAsync_WhenEnumerableIsNull_Throws()
{
IEnumerable <string> enumerable = null;
var exception = await Assert.ThrowsAsync <ArgumentNullException>(
() => NuGetAsyncExtensions.ForEachAsync(enumerable, maxDegreeOfParallelism: 2, func: _ => Task.FromResult(0)));
Assert.Equal("enumerable", exception.ParamName);
}
public async Task ForEachAsync_WithValidArguments_ProcessesAllItems()
{
var enumerable = Enumerable.Range(1, 100);
var bag = new ConcurrentBag <int>();
await NuGetAsyncExtensions.ForEachAsync(
enumerable,
maxDegreeOfParallelism : 10,
func : i =>
{
bag.Add(i);
return(Task.FromResult(0));
});
var actualResults = bag.ToArray();
Array.Sort(actualResults);
Assert.Equal(enumerable, actualResults);
}
