Dates

By default dates and times (DateTime, DateTimeOffset, DateOnly, and TimeOnly) are sanitized during verification. This is done by finding each date and taking a counter based that that specific date. That counter is then used replace the date values. This allows for repeatable tests when date values are changing.

var dateTime = DateTime.Now;
var dateTimeOffset = DateTimeOffset.Now;
var target = new DateTimeTarget
{
    DateTime = dateTime,
    Date = new(dateTime.Year, dateTime.Month, dateTime.Day),
    DateNullable = new(dateTime.Year, dateTime.Month, dateTime.Day),
    DateString = new Date(dateTime.Year, dateTime.Month, dateTime.Day).ToString(),
    DateTimeNullable = dateTime,
    DateTimeString = dateTime.ToString("F"),
    DateTimeOffset = dateTimeOffset,
    DateTimeOffsetNullable = dateTimeOffset,
    DateTimeOffsetString = dateTimeOffset.ToString("F")
};

await Verify(target);

^{snippet source | anchor}

Results in the following:

{
  DateTime: DateTime_1,
  DateTimeNullable: DateTime_1,
  Date: Date_1,
  DateNullable: Date_1,
  DateTimeOffset: DateTimeOffset_1,
  DateTimeOffsetNullable: DateTimeOffset_1,
  DateTimeString: DateTimeOffset_2,
  DateTimeOffsetString: DateTimeOffset_2,
  DateString: Date_1
}

^{snippet source | anchor}

To disable this behavior use:

Instance

var target = new
{
    Date = new DateTime(2020, 10, 10, 0, 0, 0, DateTimeKind.Utc)
};

var settings = new VerifySettings();
settings.DontScrubDateTimes();

return Verify(target, settings);

^{snippet source | anchor}

Fluent

var target = new
{
    Date = new DateTime(2020, 10, 10, 0, 0, 0, DateTimeKind.Utc)
};

return Verify(target)
    .DontScrubDateTimes();

^{snippet source | anchor}

Globally

[ModuleInitializer]
public static void ModuleInitializer() =>
    VerifierSettings.DontScrubDateTimes();

^{snippet source | anchor}

DisableDateCounting

If many calls are made to the the current date/time in quick succession, the date counting behavior (DateTime_x) can result in inconsistent results. To revert to the simpler scrubbing convention ({Scrubbed}) use DisableDateCounting.

Instance

var target = new
{
    Date = new DateTime(2020, 10, 10, 0, 0, 0, DateTimeKind.Utc)
};

var settings = new VerifySettings();
settings.DisableDateCounting();

return Verify(target, settings);

^{snippet source | anchor}

Fluent

var target = new
{
    Date = new DateTime(2020, 10, 10, 0, 0, 0, DateTimeKind.Utc)
};

return Verify(target)
    .DisableDateCounting();

^{snippet source | anchor}

Globally

[ModuleInitializer]
public static void ModuleInitializer() =>
    VerifierSettings.DisableDateCounting();

^{snippet source | anchor}

AddExtraDatetimeFormat

AddExtraDatetimeFormat allows specifying custom date formats to be scrubbed.

[ModuleInitializer]
public static void UseAddExtraDatetimeFormat() =>
    VerifierSettings.AddExtraDatetimeFormat("yyyy-MM-dd");

[Fact]
public Task WithExtraDatetimeFormat() =>
    Verify(
        new
        {
            date = "2022-11-08"
        });

^{snippet source | anchor}

Inline Dates

Strings containing inline dates can also be scrubbed. There a equivalent APIs for DateOnly, DateTime, and DateTimeOffset.

Instance

[Fact]
public Task ScrubInlineDateTimesInstance()
{
    var settings = new VerifySettings();
    settings.ScrubInlineDateTimes("yyyy-MM-dd");
    return Verify(
        "content 2020-10-20 content",
        settings);
}

^{snippet source | anchor}

Fluent

[Fact]
public Task ScrubInlineDateTimesFluent() =>
    Verify("content 2020-10-20 content")
        .ScrubInlineDateTimes("yyyy-MM-dd");

^{snippet source | anchor}

Globally

public static class ModuleInitializer
{
    [ModuleInitializer]
    public static void Init() =>
        VerifierSettings.ScrubInlineDateTimes("yyyy-MM-dd");
}

^{snippet source | anchor}

Named Date and Times

Specific date or times can be named. When any of those values are found, they will be matched with the corresponding name.

Instance

var settings = new VerifySettings();
settings.AddNamedDate(new(2020, 10, 11), "instanceNamedDate");
settings.AddNamedTime(new(1, 2), "instanceTime");
settings.AddNamedDateTime(new(2030, 1, 2), "instanceNamedDateTime");
settings.AddNamedDateTimeOffset(new DateTime(2030, 1, 2), "instanceNamedTimeOffset");
await Verify(target, settings);

^{snippet source | anchor}

Instance

await Verify(target)
    .AddNamedDate(new(2020, 10, 11), "instanceNamedDate")
    .AddNamedTime(new(1, 2), "instanceTime")
    .AddNamedDateTime(new(2030, 1, 2), "instanceNamedDateTime")
    .AddNamedDateTimeOffset(new DateTime(2030, 1, 2), "instanceNamedTimeOffset");

^{snippet source | anchor}

Globally

[ModuleInitializer]
public static void NamedDatesAndTimesGlobal()
{
    VerifierSettings.AddNamedDateTime(new(2030, 1, 1), "namedDateTime");
    VerifierSettings.AddNamedTime(new(1, 1), "namedTime");
    VerifierSettings.AddNamedDate(new(2030, 1, 1), "namedDate");
    VerifierSettings.AddNamedDateTimeOffset(new(new(2030, 1, 1)), "namedDateTimeOffset");
}

^{snippet source | anchor}