Amaury Levé
67 lines
3.3 KiB
C#
67 lines
3.3 KiB
C#
// Copyright (c) Toni Solarin-Sodara
|
|
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
|
|
|
|
using System.IO;
|
|
using System.Linq;
|
|
using System.Threading.Tasks;
|
|
using Coverlet.Core.Samples.Tests;
|
|
using Xunit;
|
|
|
|
namespace Coverlet.Core.Tests
|
|
{
|
|
public partial class CoverageTests
|
|
{
|
|
[Fact]
|
|
public void AsyncForeach()
|
|
{
|
|
string path = Path.GetTempFileName();
|
|
try
|
|
{
|
|
FunctionExecutor.Run(async (string[] pathSerialize) =>
|
|
{
|
|
CoveragePrepareResult coveragePrepareResult = await TestInstrumentationHelper.Run<AsyncForeach>(instance =>
|
|
{
|
|
int res = ((ValueTask<int>)instance.SumWithATwist(AsyncEnumerable.Range(1, 5))).GetAwaiter().GetResult();
|
|
res += ((ValueTask<int>)instance.Sum(AsyncEnumerable.Range(1, 3))).GetAwaiter().GetResult();
|
|
res += ((ValueTask<int>)instance.SumEmpty()).GetAwaiter().GetResult();
|
|
|
|
return Task.CompletedTask;
|
|
}, persistPrepareResultToFile: pathSerialize[0]);
|
|
return 0;
|
|
}, new string[] { path });
|
|
|
|
TestInstrumentationHelper.GetCoverageResult(path)
|
|
.Document("Instrumentation.AsyncForeach.cs")
|
|
.AssertLinesCovered(BuildConfiguration.Debug,
|
|
// SumWithATwist(IAsyncEnumerable<int>)
|
|
// Apparently due to entering and exiting the async state machine, line 17
|
|
// (the top of an "await foreach" loop) is reached three times *plus* twice
|
|
// per loop iteration. So, in this case, with five loop iterations, we end
|
|
// up with 3 + 5 * 2 = 13 hits.
|
|
(14, 1), (15, 1), (17, 13), (18, 5), (19, 5), (20, 5), (21, 5), (22, 5),
|
|
(24, 0), (25, 0), (26, 0), (27, 5), (29, 1), (30, 1),
|
|
// Sum(IAsyncEnumerable<int>)
|
|
(34, 1), (35, 1), (37, 9), (38, 3), (39, 3), (40, 3), (42, 1), (43, 1),
|
|
// SumEmpty()
|
|
(47, 1), (48, 1), (50, 3), (51, 0), (52, 0), (53, 0), (55, 1), (56, 1)
|
|
)
|
|
.AssertBranchesCovered(BuildConfiguration.Debug,
|
|
// SumWithATwist(IAsyncEnumerable<int>)
|
|
(17, 2, 1), (17, 3, 5), (19, 0, 5), (19, 1, 0),
|
|
// Sum(IAsyncEnumerable<int>)
|
|
(37, 0, 1), (37, 1, 3),
|
|
// SumEmpty()
|
|
// If we never entered the loop, that's a branch not taken, which is
|
|
// what we want to see.
|
|
(50, 0, 1), (50, 1, 0)
|
|
)
|
|
.ExpectedTotalNumberOfBranches(BuildConfiguration.Debug, 4);
|
|
}
|
|
finally
|
|
{
|
|
File.Delete(path);
|
|
}
|
|
}
|
|
}
|
|
}
|