Fix AutoExpand Issues with Capitalized $Expand System Query Options

[WanjohiSammy]

Issues

This pull request fixes #1284.

Description

When using AutoExpand, and specifying a system query option that's not lower case (such as $Expand) an exception is thrown. The exception indicates that Expand is being added twice.

"message": "The query specified in the URI is not valid. Query option '$expand/expand' was specified more than once, but it must be specified at most once.",

This change is to resolve issues with the AutoExpand when using capitalized $Expand system query options

For example, given the following entities where Friends prop and Trip class are AutoExpand

public class Person
{
    public int Id { get; set; }

    public string? Name { get; set; }

    public IList<WeekDay>? WorkingDays { get; set; }

    [AutoExpand]
    public virtual ICollection<Person> Friends { get; set; }

    public virtual ICollection<Trip> Trips { get; set; }
}

[AutoExpand]
public class Trip
{
    public int Id { get; set; }

    public string? Name { get; set; }
}

With this change, we should be able to use $Expand(capitalized of $expand) with the AutoExpand navigation properties:

/People?$Expand=Friends
/People?$Expand=Trips
/People?$Expand=Friends,Trips
/People?$EXPAND=Friends

Checklist (Uncheck if it is not completed)

• Test cases added
• Build and test with one-click build and test script passed

Additional work necessary

If documentation update is needed, please add "Docs Needed" label to the issue and provide details about the required document change in the issue.

[habbes]

@WanjohiSammy does this issue only affect AutoExpand? Also do we have tests for query options without a $ prefix?

[WanjohiSammy]

@WanjohiSammy does this issue only affect AutoExpand? Also do we have tests for query options without a $ prefix?

@habbes This addresses the issue of Select or Expand AutoExpand navigation property using capitalized Select or Expand with or without $ prefix. I have added tests for query options without a $ prefix