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@@ -0,0 +1,85 @@
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+// Licensed to the .NET Foundation under one or more agreements.
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+// The .NET Foundation licenses this file to you under the Apache 2.0 License.
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+// See the LICENSE file in the project root for more information.
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+
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+using System;
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+using System.Linq;
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+using System.Threading;
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+using System.Threading.Tasks;
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+using Xunit;
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+
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+namespace Tests
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+{
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+ public class ForEachAsync : AsyncEnumerableTests
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+ {
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+ [Fact]
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+ public async Task ForEachAsync_Null()
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+ {
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+ await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.ForEachAsync<int>(null, x => { }));
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+ await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.ForEachAsync<int>(AsyncEnumerable.Return(42), default(Action<int>)));
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+ await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.ForEachAsync<int>(null, (x, i) => { }));
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+ await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.ForEachAsync<int>(AsyncEnumerable.Return(42), default(Action<int, int>)));
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+
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+ await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.ForEachAsync<int>(null, x => { }, CancellationToken.None));
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+ await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.ForEachAsync<int>(AsyncEnumerable.Return(42), default(Action<int>), CancellationToken.None));
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+ await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.ForEachAsync<int>(null, (x, i) => { }, CancellationToken.None));
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+ await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.ForEachAsync<int>(AsyncEnumerable.Return(42), default(Action<int, int>), CancellationToken.None));
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+ }
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+
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+ [Fact]
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+ public void ForEachAsync1()
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+ {
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+ var sum = 0;
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+ var xs = new[] { 1, 2, 3, 4 }.ToAsyncEnumerable();
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+
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+ xs.ForEachAsync(x => sum += x).Wait(WaitTimeoutMs);
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+ Assert.Equal(10, sum);
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+ }
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+
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+ [Fact]
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+ public void ForEachAsync2()
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+ {
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+ var sum = 0;
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+ var xs = new[] { 1, 2, 3, 4 }.ToAsyncEnumerable();
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+
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+ xs.ForEachAsync((x, i) => sum += x * i).Wait(WaitTimeoutMs);
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+ Assert.Equal(1 * 0 + 2 * 1 + 3 * 2 + 4 * 3, sum);
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+ }
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+
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+ [Fact]
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+ public void ForEachAsync3()
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+ {
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+ var ex = new Exception("Bang");
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+ var xs = new[] { 1, 2, 3, 4 }.ToAsyncEnumerable();
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+
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+ AssertThrows<Exception>(() => xs.ForEachAsync(x => { throw ex; }).Wait(WaitTimeoutMs), ex_ => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
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+ }
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+
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+ [Fact]
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+ public void ForEachAsync4()
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+ {
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+ var ex = new Exception("Bang");
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+ var xs = new[] { 1, 2, 3, 4 }.ToAsyncEnumerable();
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+
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+ AssertThrows<Exception>(() => xs.ForEachAsync((x, i) => { throw ex; }).Wait(WaitTimeoutMs), ex_ => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
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+ }
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+
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+ [Fact]
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+ public void ForEachAsync5()
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+ {
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+ var ex = new Exception("Bang");
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+ var xs = AsyncEnumerable.Throw<int>(ex);
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+
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+ AssertThrows<Exception>(() => xs.ForEachAsync(x => { throw ex; }).Wait(WaitTimeoutMs), ex_ => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
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+ }
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+
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+ [Fact]
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+ public void ForEachAsync6()
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+ {
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+ var ex = new Exception("Bang");
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+ var xs = AsyncEnumerable.Throw<int>(ex);
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+
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+ AssertThrows<Exception>(() => xs.ForEachAsync((x, i) => { throw ex; }).Wait(WaitTimeoutMs), ex_ => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
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+ }
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+ }
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+}
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