Add TarEntry conversion constructors#70325

Merged

carlossanlop merged 47 commits intodotnet:mainfrom

carlossanlop:TarConversionConstructors

Jun 21, 2022

Commits on Jun 20, 2022

ref: Conversion constructors
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src: Conversion constructors
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tests: Conversion constructors
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src: Conversion constructor should call this instead of base
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tests: Verify unseekable stream data can be read after conversion
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Adjust _readerOfOrigin nullability in constructors.
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Move most constructor work to the base class.
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ref: Move TarFormat from TarReader to TarEntry
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ref: Move Format property from TarReader to TarEntry
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src: Move Format property from TarReader to TarEntry
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tests: Move Format property from TarReader to TarEntry
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nit - Remove extra spacing in tests
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src: When converting, only transfer fields available in the new format.
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tests: Verify only supported fields are transferred when converting.
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Revert internal->private for magic and version
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Add boolean arg to PaxTarEntry method that adds atime and ctime
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Make sure back and forth tests create firstt timestamp with a slight difference before the constructor invocation, and move the second timestamp right before the first conversion
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Make _readerOfOrigin private again
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src: Use UtcNow, not Now
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tests: Use UtcNow, not Now. Compare converted DateTimeOffset from double only down to seconds and offset.
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Address feedback for comments.
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Add asserts that verify mtime has a non-default value when it is expected for it to be set to UtcNow.
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Adress feedback for setting field values in PosixTarEntry and TarEntry constructors.
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Remove code that reads atime and ctime from extended attributes and sets it to header._atime and header._ctime.
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Make sure that extended attributes always have an atime and a ctime when writing the entry to an archive. Default value is UtcNow.
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Address feedback around timestamps in tests.
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Add more tests for expected values in extended attributes after writing entry to archive.
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Reuse code for conversion tests.
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Change test comparisons of Assert.True with ">=" to use AssertExtensions.GreaterThanOrEqualTo instead.
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Reduce number of dictionary newing, only do it when the contents are about to be read or something needs to be written into it.
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Avoid returning dateTimeOffset != default, instead return true on success
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Remove redundant assignment of format to header.
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Pass Dictionary<string,string> directly to make use of non-virtual TryGetValue in private code.
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Add tests that verify the default writer format is utilized when calling WriteEntry(string,string?)
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Add overload that takes long for converting number of seconds to DateTimeOffset.
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Address latest suggestions by eerhardt
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Make sure dictionary is initialized once in PaxTarEntry constructor.
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Reuse code for single conversion construction tests and back-n-forth conversion construction tests.
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Invert verification of default case and TarEntryFormat.Unknown in switch in TarWriter.WriteEntry.
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Change "if dictionary is not null" to "Debug.Assert "dictionary is not null" in PaxTarEntry timestamp method.
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Conversion tests should also check expected values of ATime and CTime in Gnu and Pax when converting from Ustar or V7.
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Chop long comment, remove another 'preferred default'.
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Make unseekable conversion tests theories to verify all writer formats.
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Set _prefix to Empty if other is not ustar or pax
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Rename TarWriter archiveFormat parameter to format
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Compare datetime offsets only up to seconds
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Increase fixed point format specifier precision, use test comparison of datetimeoffsets only down to seconds.
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