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fix: set last access time with unspecified date time kind #879

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xtopaz wants to merge 5 commits into from
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fix: set last access time with unspecified date time kind #879

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55ca1ab
Fix missing conversion call
xtopaz Aug 25, 2022
dbd1a6a
Add unit tests
xtopaz Aug 25, 2022
6cc2b91
Merge branch 'main' into bugfix/setLastWriteTimeWithUnspecifiedDateTi…
xtopaz Aug 26, 2022
86a509e
Merge branch 'main' into bugfix/setLastWriteTimeWithUnspecifiedDateTi…
xtopaz Sep 13, 2022
c939931
Adjust DateTimeKind.Unspecified
vbtig Sep 16, 2022
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2 changes: 1 addition & 1 deletion src/System.IO.Abstractions.TestingHelpers/MockFileInfo.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -137,7 +137,7 @@ public override DateTime LastAccessTimeUtc
set
{
var mockFileData = GetMockFileDataForWrite();
mockFileData.LastAccessTime = value;
mockFileData.LastAccessTime = value.ToLocalTime();
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@fgreinacher fgreinacher Sep 10, 2022

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Should we also do this for the other *TimeUtc properties?

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@fgreinacher fgreinacher Sep 10, 2022

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Not sure whether ToLocalTime is correct here. I think we rather want something like this: https://github.com/dotnet/runtime/blob/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7/src/libraries/System.Private.CoreLib/src/System/IO/FileSystemInfo.cs#L108

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@xtopaz xtopaz Sep 13, 2022 •
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@fgreinacher Sorry for the late reply, just got back from vacation.

All other *TimeUtc properties already contain the ToLocalTime call. This way the behavior has been unified.

File.File.GetUtcDateTimeOffsetcannot be used because it is internal. However, this behaves analogously to the proposed implementation, since it takes Utc for DateTimeKind.Unspecified.

To be more precise, the preliminary conversion using ToLocalTime for values with DateTimeKind.Unspecified assumes UTC. The subsequent implicit conversion to DateTimeOffset then takes the time zone into account correctly. Thus the timestamps behave analogously to those in System.FileInfo.

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@xtopaz xtopaz Sep 16, 2022

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@fgreinacher I've incorporated the recent changes from #875 and all test look fine.

}
}

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51 changes: 51 additions & 0 deletions tests/System.IO.Abstractions.TestingHelpers.Tests/MockFileInfoTests.cs
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Expand Up @@ -392,6 +392,57 @@ public void MockFileInfo_LastAccessTimeUtc_ShouldSetCreationTimeUtcOfFileInMemor
Assert.AreEqual(newUtcTime, fileInfo.LastAccessTimeUtc);
}

[Test]
public void MockFileInfo_CreationTimeUtcWithUnspecifiedDateTimeKind_ShouldSetCreationTimeUtcOfFileInMemoryFileSystem()
{
var date = DateTime.SpecifyKind(DateTime.Now.AddHours(-4), DateTimeKind.Unspecified);
var fileData = new MockFileData("Demo text content");
var fileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
{
{ MockUnixSupport.Path(@"c:\a.txt"), fileData }
});
var fileInfo = new MockFileInfo(fileSystem, MockUnixSupport.Path(@"c:\a.txt"))
{
CreationTimeUtc = date,
};

Assert.AreEqual(date, fileInfo.CreationTimeUtc);
}

[Test]
public void MockFileInfo_LastAccessTimeUtcWithUnspecifiedDateTimeKind_ShouldSetLastAccessTimeUtcOfFileInMemoryFileSystem()
{
var date = DateTime.SpecifyKind(DateTime.Now.AddHours(-4), DateTimeKind.Unspecified);
var fileData = new MockFileData("Demo text content");
var fileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
{
{ MockUnixSupport.Path(@"c:\a.txt"), fileData }
});
var fileInfo = new MockFileInfo(fileSystem, MockUnixSupport.Path(@"c:\a.txt"))
{
LastAccessTimeUtc = date
};

Assert.AreEqual(date, fileInfo.LastAccessTimeUtc);
}

[Test]
public void MockFileInfo_LastWriteTimeUtcWithUnspecifiedDateTimeKind_ShouldSetLastWriteTimeUtcOfFileInMemoryFileSystem()
{
var date = DateTime.SpecifyKind(DateTime.Now.AddHours(-4), DateTimeKind.Unspecified);
var fileData = new MockFileData("Demo text content");
var fileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
{
{ MockUnixSupport.Path(@"c:\a.txt"), fileData }
});
var fileInfo = new MockFileInfo(fileSystem, MockUnixSupport.Path(@"c:\a.txt"))
{
LastWriteTimeUtc = date,
};

Assert.AreEqual(date, fileInfo.LastWriteTimeUtc);
}

[Test]
public void MockFileInfo_LastWriteTime_ShouldReturnDefaultTimeForNonExistingFile()
{
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