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[libs][Unix] Fix UTC alias lookup #88641

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merged 9 commits into from
Jul 13, 2023
Merged

[libs][Unix] Fix UTC alias lookup #88641

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a3be3e1
[libs][Unix] Fix UTC alias lookup
RenderMichael Jul 11, 2023
b00b0df
Add regression test (non-windows)
RenderMichael Jul 11, 2023
8c9c927
Fix TimeZoneInfo equality.
RenderMichael Jul 11, 2023
3f21ef5
Use cleaner TimeZoneInfo.HasSameRules() method
RenderMichael Jul 11, 2023
1091336
Check only BaseUtcOffset and GetAdjustmentRules()
RenderMichael Jul 12, 2023
ad365f3
Turn off build on browser
RenderMichael Jul 12, 2023
58ddb05
Add UTC aliases to SystemTimeZonesTestData
RenderMichael Jul 12, 2023
4e122bd
Add back `UtcAliases_MapToUtc` test
RenderMichael Jul 12, 2023
5d547ea
don't run UTC alias test on browser
RenderMichael Jul 13, 2023
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2 changes: 1 addition & 1 deletion src/libraries/System.Private.CoreLib/src/System/TimeZoneInfo.Unix.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -33,8 +33,8 @@ private static bool IsUtcAlias (string id)
case 69: // e
case 101: // E
return string.Equals(id, "Etc/UTC", StringComparison.OrdinalIgnoreCase) ||
string.Equals(id, "Etc/UCT", StringComparison.OrdinalIgnoreCase) ||
string.Equals(id, "Etc/Universal", StringComparison.OrdinalIgnoreCase) ||
string.Equals(id, "Etc/UTC", StringComparison.OrdinalIgnoreCase) ||
string.Equals(id, "Etc/Zulu", StringComparison.OrdinalIgnoreCase);
case 85: // u
case 117: // U
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22 changes: 22 additions & 0 deletions src/libraries/System.Runtime/tests/System/TimeZoneInfoTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2334,6 +2334,14 @@ public static IEnumerable<object[]> SystemTimeZonesTestData()
yield return new object[] { tz };
}
}

if (!PlatformDetection.IsBrowser)
{
foreach (string alias in s_UtcAliases)
{
yield return new object[] { TimeZoneInfo.FindSystemTimeZoneById(alias) };
}
}
}
}

Expand Down Expand Up @@ -2424,6 +2432,20 @@ public static void TimeZoneDisplayNames_Unix(TimeZoneInfo timeZone)
}
}

[Fact]
[PlatformSpecific(~TestPlatforms.Windows & ~TestPlatforms.Browser)]
public static void UtcAliases_MapToUtc()
{
TimeZoneInfo.AdjustmentRule[] expectedAdjustmentRules = TimeZoneInfo.Utc.GetAdjustmentRules();

foreach (var alias in s_UtcAliases)
{
TimeZoneInfo actualUtc = TimeZoneInfo.FindSystemTimeZoneById(alias);
Assert.Equal(TimeZoneInfo.Utc.BaseUtcOffset, actualUtc.BaseUtcOffset);
Assert.Equal(expectedAdjustmentRules, actualUtc.GetAdjustmentRules());
}
}

[ActiveIssue("https://github.com/dotnet/runtime/issues/19794", TestPlatforms.AnyUnix)]
[Theory]
[MemberData(nameof(SystemTimeZonesTestData))]
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