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CSHARP-3268: Investigate Military Time Failures #1687

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CSHARP-3268: Investigate Military Time Failures #1687

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50 changes: 25 additions & 25 deletions src/MongoDB.Bson/IO/JsonReader.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -1373,7 +1373,7 @@ private DateTime ParseJavaScriptDateTimeString(string dateTimeString)
{
// if DateTime.TryParse succeeds we're done, otherwise assume it's an RFC 822 formatted DateTime string
DateTime dateTime;
if (DateTime.TryParse(dateTimeString, out dateTime))
if (!dateTimeString.EndsWith("A") && DateTime.TryParse(dateTimeString, out dateTime))
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For some reason DateTime.TryParse returns true for time zone A but who knows what it thinks the A means.

If the string ends in A then we should use our own parsing method.

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Any chance there might be a collision with some other format ending with "A"?
Also there is not handling for "Z", is it a known abbreviation for UTC?

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In the existing test data nothing else ends with "A". But you are right, there might be a timezone abbreviation we don't know about that ends in A.

We could use a regular expression:

if (!Regex.Matches(dateString, "[0-9 ]A$") && ...)

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We have a test case for Z. I think it is a standard abbreviation for UTC and is handled by DateTime.TryParse.

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Thanks, just wanted to confirm that Z is for UTC.
Looking at .net code, seems that A is related to Era (AD is also valid).

What worries me is that "Mon, 10 Oct 2011 11:22:33 A" is parsed to a certain value in .NET, and we'll be overriding that. If going with this change we need to convince ourselves that this is the right thing to do.

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Also how will this "Mon, 10 Oct 2011 11:22:33 AD" get parsed?

{
return dateTime;
}
Expand Down Expand Up @@ -1479,30 +1479,30 @@ private DateTime ParseJavaScriptDateTimeString(string dateTimeString)
case "MDT": offset = TimeSpan.FromHours(-6); break;
case "PST": offset = TimeSpan.FromHours(-8); break;
case "PDT": offset = TimeSpan.FromHours(-7); break;
case "A": offset = TimeSpan.FromHours(-1); break;
case "B": offset = TimeSpan.FromHours(-2); break;
case "C": offset = TimeSpan.FromHours(-3); break;
case "D": offset = TimeSpan.FromHours(-4); break;
case "E": offset = TimeSpan.FromHours(-5); break;
case "F": offset = TimeSpan.FromHours(-6); break;
case "G": offset = TimeSpan.FromHours(-7); break;
case "H": offset = TimeSpan.FromHours(-8); break;
case "I": offset = TimeSpan.FromHours(-9); break;
case "K": offset = TimeSpan.FromHours(-10); break;
case "L": offset = TimeSpan.FromHours(-11); break;
case "M": offset = TimeSpan.FromHours(-12); break;
case "N": offset = TimeSpan.FromHours(1); break;
case "O": offset = TimeSpan.FromHours(2); break;
case "P": offset = TimeSpan.FromHours(3); break;
case "Q": offset = TimeSpan.FromHours(4); break;
case "R": offset = TimeSpan.FromHours(5); break;
case "S": offset = TimeSpan.FromHours(6); break;
case "T": offset = TimeSpan.FromHours(7); break;
case "U": offset = TimeSpan.FromHours(8); break;
case "V": offset = TimeSpan.FromHours(9); break;
case "W": offset = TimeSpan.FromHours(10); break;
case "X": offset = TimeSpan.FromHours(11); break;
case "Y": offset = TimeSpan.FromHours(12); break;
case "A": offset = TimeSpan.FromHours(1); break;
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The sign of all the offsets for A to Y was backwards.

case "B": offset = TimeSpan.FromHours(2); break;
case "C": offset = TimeSpan.FromHours(3); break;
case "D": offset = TimeSpan.FromHours(4); break;
case "E": offset = TimeSpan.FromHours(5); break;
case "F": offset = TimeSpan.FromHours(6); break;
case "G": offset = TimeSpan.FromHours(7); break;
case "H": offset = TimeSpan.FromHours(8); break;
case "I": offset = TimeSpan.FromHours(9); break;
case "K": offset = TimeSpan.FromHours(10); break;
case "L": offset = TimeSpan.FromHours(11); break;
case "M": offset = TimeSpan.FromHours(12); break;
case "N": offset = TimeSpan.FromHours(-1); break;
case "O": offset = TimeSpan.FromHours(-2); break;
case "P": offset = TimeSpan.FromHours(-3); break;
case "Q": offset = TimeSpan.FromHours(-4); break;
case "R": offset = TimeSpan.FromHours(-5); break;
case "S": offset = TimeSpan.FromHours(-6); break;
case "T": offset = TimeSpan.FromHours(-7); break;
case "U": offset = TimeSpan.FromHours(-8); break;
case "V": offset = TimeSpan.FromHours(-9); break;
case "W": offset = TimeSpan.FromHours(-10); break;
case "X": offset = TimeSpan.FromHours(-11); break;
case "Y": offset = TimeSpan.FromHours(-12); break;
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Did you mean that we should add a case for "Z" here?

I don't see how we would ever reach here with a "Z" because DateTime.TryParse would have already handled it.

default:
var offsetSign = zone.Substring(0);
var offsetHours = zone.Substring(1, 2);
Expand Down
213 changes: 99 additions & 114 deletions tests/MongoDB.Bson.Tests/Jira/CSharp275Tests.cs
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Expand Up @@ -22,125 +22,110 @@ namespace MongoDB.Bson.Tests.Jira
{
public class CSharp275Tests
{
private class Test
{
public string Json;
public string Iso;
public Test(string json, string iso)
{
this.Json = json;
this.Iso = iso;
}
}

private Test[] _tests = new Test[]
{
public static object[][] TestParseDatesData => [
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Convert to supply data to a Theory.

// note: use EST/EDT in all Json values to ensure DateTime.Parse doesn't work
// test with dayOfWeek
new Test("Mon, 10 Oct 2011 11:22:33 EDT", "2011-10-10T11:22:33-04:00"),
new Test("Tue, 11 Oct 2011 11:22:33 EDT", "2011-10-11T11:22:33-04:00"),
new Test("Wed, 12 Oct 2011 11:22:33 EDT", "2011-10-12T11:22:33-04:00"),
new Test("Thu, 13 Oct 2011 11:22:33 EDT", "2011-10-13T11:22:33-04:00"),
new Test("Fri, 14 Oct 2011 11:22:33 EDT", "2011-10-14T11:22:33-04:00"),
new Test("Sat, 15 Oct 2011 11:22:33 EDT", "2011-10-15T11:22:33-04:00"),
new Test("Sun, 16 Oct 2011 11:22:33 EDT", "2011-10-16T11:22:33-04:00"),
// test without dayOfWeek
new Test("10 Oct 2011 11:22:33 EDT", "2011-10-10T11:22:33-04:00"),
new Test("11 Oct 2011 11:22:33 EDT", "2011-10-11T11:22:33-04:00"),
new Test("12 Oct 2011 11:22:33 EDT", "2011-10-12T11:22:33-04:00"),
new Test("13 Oct 2011 11:22:33 EDT", "2011-10-13T11:22:33-04:00"),
new Test("14 Oct 2011 11:22:33 EDT", "2011-10-14T11:22:33-04:00"),
new Test("15 Oct 2011 11:22:33 EDT", "2011-10-15T11:22:33-04:00"),
new Test("16 Oct 2011 11:22:33 EDT", "2011-10-16T11:22:33-04:00"),
// test monthName
new Test("1 Jan 2011 11:22:33 EST", "2011-01-01T11:22:33-05:00"),
new Test("1 Feb 2011 11:22:33 EST", "2011-02-01T11:22:33-05:00"),
new Test("1 Mar 2011 11:22:33 EST", "2011-03-01T11:22:33-05:00"),
new Test("1 Apr 2011 11:22:33 EDT", "2011-04-01T11:22:33-04:00"),
new Test("1 May 2011 11:22:33 EDT", "2011-05-01T11:22:33-04:00"),
new Test("1 Jun 2011 11:22:33 EDT", "2011-06-01T11:22:33-04:00"),
new Test("1 Jul 2011 11:22:33 EDT", "2011-07-01T11:22:33-04:00"),
new Test("1 Aug 2011 11:22:33 EDT", "2011-08-01T11:22:33-04:00"),
new Test("1 Sep 2011 11:22:33 EDT", "2011-09-01T11:22:33-04:00"),
new Test("1 Oct 2011 11:22:33 EDT", "2011-10-01T11:22:33-04:00"),
new Test("1 Nov 2011 11:22:33 EDT", "2011-11-01T11:22:33-04:00"),
new Test("1 Dec 2011 11:22:33 EST", "2011-12-01T11:22:33-05:00"),
// test 2-digit year
new Test("Mon, 1 Jan 01 11:22:33 EST", "2001-01-01T11:22:33-5:00"),
new Test("Mon, 1 Jan 29 11:22:33 EST", "2029-01-01T11:22:33-5:00"),
new Test("Tue, 1 Jan 30 11:22:33 EST", "2030-01-01T11:22:33-5:00"),
new Test("Wed, 1 Jan 31 11:22:33 EST", "2031-01-01T11:22:33-5:00"),
new Test("Thu, 1 Jan 32 11:22:33 EST", "2032-01-01T11:22:33-5:00"),
new Test("Fri, 1 Jan 99 11:22:33 EST", "1999-01-01T11:22:33-5:00"),
// test time zones
new Test("Mon, 10 Oct 2011 11:22:33 UT", "2011-10-10T11:22:33-00:00"),
new Test("Mon, 10 Oct 2011 11:22:33 GMT", "2011-10-10T11:22:33-00:00"),
new Test("Mon, 10 Oct 2011 11:22:33 EST", "2011-10-10T11:22:33-05:00"),
new Test("Mon, 10 Oct 2011 11:22:33 EDT", "2011-10-10T11:22:33-04:00"),
new Test("Mon, 10 Oct 2011 11:22:33 CST", "2011-10-10T11:22:33-06:00"),
new Test("Mon, 10 Oct 2011 11:22:33 CDT", "2011-10-10T11:22:33-05:00"),
new Test("Mon, 10 Oct 2011 11:22:33 MST", "2011-10-10T11:22:33-07:00"),
new Test("Mon, 10 Oct 2011 11:22:33 MDT", "2011-10-10T11:22:33-06:00"),
new Test("Mon, 10 Oct 2011 11:22:33 PST", "2011-10-10T11:22:33-08:00"),
new Test("Mon, 10 Oct 2011 11:22:33 PDT", "2011-10-10T11:22:33-07:00"),
// TODO: Investigate Military Time Failures
// https://jira.mongodb.org/browse/CSHARP-3268
//new Test("Mon, 10 Oct 2011 11:22:33 A", "2011-10-10T11:22:33+01:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 B", "2011-10-10T11:22:33+02:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 C", "2011-10-10T11:22:33+03:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 D", "2011-10-10T11:22:33+04:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 E", "2011-10-10T11:22:33+05:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 F", "2011-10-10T11:22:33+06:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 G", "2011-10-10T11:22:33+07:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 H", "2011-10-10T11:22:33+08:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 I", "2011-10-10T11:22:33+09:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 K", "2011-10-10T11:22:33+10:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 L", "2011-10-10T11:22:33+11:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 M", "2011-10-10T11:22:33+12:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 N", "2011-10-10T11:22:33-01:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 O", "2011-10-10T11:22:33-02:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 P", "2011-10-10T11:22:33-03:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 Q", "2011-10-10T11:22:33-04:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 R", "2011-10-10T11:22:33-05:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 S", "2011-10-10T11:22:33-06:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 T", "2011-10-10T11:22:33-07:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 U", "2011-10-10T11:22:33-08:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 V", "2011-10-10T11:22:33-09:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 W", "2011-10-10T11:22:33-10:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 X", "2011-10-10T11:22:33-11:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 Y", "2011-10-10T11:22:33-12:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 Z", "2011-10-10T11:22:33-00:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 +0000", "2011-10-10T11:22:33+00:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 -0000", "2011-10-10T11:22:33-00:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 +0100", "2011-10-10T11:22:33+01:00"),
//new Test("Mon, 10 Oct 2011 11:22:33 -0100", "2011-10-10T11:22:33-01:00")
};
["Mon, 10 Oct 2011 11:22:33 EDT", "2011-10-10T11:22:33-04:00"],
["Tue, 11 Oct 2011 11:22:33 EDT", "2011-10-11T11:22:33-04:00"],
["Wed, 12 Oct 2011 11:22:33 EDT", "2011-10-12T11:22:33-04:00"],
["Thu, 13 Oct 2011 11:22:33 EDT", "2011-10-13T11:22:33-04:00"],
["Fri, 14 Oct 2011 11:22:33 EDT", "2011-10-14T11:22:33-04:00"],
["Sat, 15 Oct 2011 11:22:33 EDT", "2011-10-15T11:22:33-04:00"],
["Sun, 16 Oct 2011 11:22:33 EDT", "2011-10-16T11:22:33-04:00"],
// // test without dayOfWeek
["10 Oct 2011 11:22:33 EDT", "2011-10-10T11:22:33-04:00"],
["11 Oct 2011 11:22:33 EDT", "2011-10-11T11:22:33-04:00"],
["12 Oct 2011 11:22:33 EDT", "2011-10-12T11:22:33-04:00"],
["13 Oct 2011 11:22:33 EDT", "2011-10-13T11:22:33-04:00"],
["14 Oct 2011 11:22:33 EDT", "2011-10-14T11:22:33-04:00"],
["15 Oct 2011 11:22:33 EDT", "2011-10-15T11:22:33-04:00"],
["16 Oct 2011 11:22:33 EDT", "2011-10-16T11:22:33-04:00"],
// // test monthName
["1 Jan 2011 11:22:33 EST", "2011-01-01T11:22:33-05:00"],
["1 Feb 2011 11:22:33 EST", "2011-02-01T11:22:33-05:00"],
["1 Mar 2011 11:22:33 EST", "2011-03-01T11:22:33-05:00"],
["1 Apr 2011 11:22:33 EDT", "2011-04-01T11:22:33-04:00"],
["1 May 2011 11:22:33 EDT", "2011-05-01T11:22:33-04:00"],
["1 Jun 2011 11:22:33 EDT", "2011-06-01T11:22:33-04:00"],
["1 Jul 2011 11:22:33 EDT", "2011-07-01T11:22:33-04:00"],
["1 Aug 2011 11:22:33 EDT", "2011-08-01T11:22:33-04:00"],
["1 Sep 2011 11:22:33 EDT", "2011-09-01T11:22:33-04:00"],
["1 Oct 2011 11:22:33 EDT", "2011-10-01T11:22:33-04:00"],
["1 Nov 2011 11:22:33 EDT", "2011-11-01T11:22:33-04:00"],
["1 Dec 2011 11:22:33 EST", "2011-12-01T11:22:33-05:00"],
// // test 2-digit year
["Mon, 1 Jan 01 11:22:33 EST", "2001-01-01T11:22:33-5:00"],
["Mon, 1 Jan 29 11:22:33 EST", "2029-01-01T11:22:33-5:00"],
["Tue, 1 Jan 30 11:22:33 EST", "2030-01-01T11:22:33-5:00"],
["Wed, 1 Jan 31 11:22:33 EST", "2031-01-01T11:22:33-5:00"],
["Thu, 1 Jan 32 11:22:33 EST", "2032-01-01T11:22:33-5:00"],
["Fri, 1 Jan 99 11:22:33 EST", "1999-01-01T11:22:33-5:00"],
// // test time zones
["Mon, 10 Oct 2011 11:22:33 UT", "2011-10-10T11:22:33-00:00"],
["Mon, 10 Oct 2011 11:22:33 GMT", "2011-10-10T11:22:33-00:00"],
["Mon, 10 Oct 2011 11:22:33 EST", "2011-10-10T11:22:33-05:00"],
["Mon, 10 Oct 2011 11:22:33 EDT", "2011-10-10T11:22:33-04:00"],
["Mon, 10 Oct 2011 11:22:33 CST", "2011-10-10T11:22:33-06:00"],
["Mon, 10 Oct 2011 11:22:33 CDT", "2011-10-10T11:22:33-05:00"],
["Mon, 10 Oct 2011 11:22:33 MST", "2011-10-10T11:22:33-07:00"],
["Mon, 10 Oct 2011 11:22:33 MDT", "2011-10-10T11:22:33-06:00"],
["Mon, 10 Oct 2011 11:22:33 PST", "2011-10-10T11:22:33-08:00"],
["Mon, 10 Oct 2011 11:22:33 PDT", "2011-10-10T11:22:33-07:00"],
// military time zones
["Mon, 10 Oct 2011 11:22:33 A", "2011-10-10T11:22:33+01:00"],
["Mon, 10 Oct 2011 11:22:33 B", "2011-10-10T11:22:33+02:00"],
["Mon, 10 Oct 2011 11:22:33 C", "2011-10-10T11:22:33+03:00"],
["Mon, 10 Oct 2011 11:22:33 D", "2011-10-10T11:22:33+04:00"],
["Mon, 10 Oct 2011 11:22:33 E", "2011-10-10T11:22:33+05:00"],
["Mon, 10 Oct 2011 11:22:33 F", "2011-10-10T11:22:33+06:00"],
["Mon, 10 Oct 2011 11:22:33 G", "2011-10-10T11:22:33+07:00"],
["Mon, 10 Oct 2011 11:22:33 H", "2011-10-10T11:22:33+08:00"],
["Mon, 10 Oct 2011 11:22:33 I", "2011-10-10T11:22:33+09:00"],
["Mon, 10 Oct 2011 11:22:33 K", "2011-10-10T11:22:33+10:00"],
["Mon, 10 Oct 2011 11:22:33 L", "2011-10-10T11:22:33+11:00"],
["Mon, 10 Oct 2011 11:22:33 M", "2011-10-10T11:22:33+12:00"],
["Mon, 10 Oct 2011 11:22:33 N", "2011-10-10T11:22:33-01:00"],
["Mon, 10 Oct 2011 11:22:33 O", "2011-10-10T11:22:33-02:00"],
["Mon, 10 Oct 2011 11:22:33 P", "2011-10-10T11:22:33-03:00"],
["Mon, 10 Oct 2011 11:22:33 Q", "2011-10-10T11:22:33-04:00"],
["Mon, 10 Oct 2011 11:22:33 R", "2011-10-10T11:22:33-05:00"],
["Mon, 10 Oct 2011 11:22:33 S", "2011-10-10T11:22:33-06:00"],
["Mon, 10 Oct 2011 11:22:33 T", "2011-10-10T11:22:33-07:00"],
["Mon, 10 Oct 2011 11:22:33 U", "2011-10-10T11:22:33-08:00"],
["Mon, 10 Oct 2011 11:22:33 V", "2011-10-10T11:22:33-09:00"],
["Mon, 10 Oct 2011 11:22:33 W", "2011-10-10T11:22:33-10:00"],
["Mon, 10 Oct 2011 11:22:33 X", "2011-10-10T11:22:33-11:00"],
["Mon, 10 Oct 2011 11:22:33 Y", "2011-10-10T11:22:33-12:00"],
["Mon, 10 Oct 2011 11:22:33 Z", "2011-10-10T11:22:33-00:00"],
["Mon, 10 Oct 2011 11:22:33 +0000", "2011-10-10T11:22:33+00:00"],
["Mon, 10 Oct 2011 11:22:33 -0000", "2011-10-10T11:22:33-00:00"],
["Mon, 10 Oct 2011 11:22:33 +0100", "2011-10-10T11:22:33+01:00"],
["Mon, 10 Oct 2011 11:22:33 -0100", "2011-10-10T11:22:33-01:00"]
];

[Fact]
public void TestParseDates()
[Theory]
[MemberData(nameof(TestParseDatesData))]
public void TestParseDates(string dateString, string isoString)
{
foreach (var test in _tests)
var json = string.Format("{{ date : new Date('{0}') }}", dateString);
BsonDocument document = null;
try
{
document = BsonDocument.Parse(json);
}
catch (Exception ex)
{
var message = string.Format("Error parsing: new Date(\"{0}\"). Message: {1}.", dateString, ex.Message);
throw new AssertionException(message); // note: the test data for 2-digit years needs to be adjusted at the beginning of each year
}
var dateTime = document["date"].ToUniversalTime();
var expected = DateTime.Parse(isoString).ToUniversalTime();
Assert.Equal(DateTimeKind.Utc, dateTime.Kind);
Assert.Equal(DateTimeKind.Utc, expected.Kind);
if (dateTime != expected)
{
var json = string.Format("{{ date : new Date('{0}') }}", test.Json);
BsonDocument document = null;
try
{
document = BsonDocument.Parse(json);
}
catch (Exception ex)
{
var message = string.Format("Error parsing: new Date(\"{0}\"). Message: {1}.", test.Json, ex.Message);
throw new AssertionException(message); // note: the test data for 2-digit years needs to be adjusted at the beginning of each year
}
var dateTime = document["date"].ToUniversalTime();
var expected = DateTime.Parse(test.Iso).ToUniversalTime();
Assert.Equal(DateTimeKind.Utc, dateTime.Kind);
Assert.Equal(DateTimeKind.Utc, expected.Kind);
if (dateTime != expected)
{
var message = string.Format("Parsing new Date(\"{0}\") did not yield expected result {1}.", test.Json, expected.ToString("o"));
throw new AssertionException(message);
}
var message = string.Format("Parsing new Date(\"{0}\") did not yield expected result {1}.", dateString, expected.ToString("o"));
throw new AssertionException(message);
}
}
}
Expand Down