TClientDataSet's odd behavior with hyphens in string fields

[Navid Madani 1]

In the DUnitX tests below, the first 4 cases fail: the last character is omitted. It seems that for each hyphen added after the first, an extra character from the end is not written to the TClientDataSet field. 

 

Is this normal behavior? Thanks in advance.

 

unit uCDSTest;

interface

uses
    DUnitX.TestFramework
  , Data.DB
  , Datasnap.DBClient
  ;

type
  [TestFixture]
  TClientDataSetTest = class
  private
    fCDS: TClientDataSet;
  public
    [Setup]
    procedure Setup;
    [TearDown]
    procedure TearDown;
    [Test]
    [TestCase('Test0','S0002-9270(99)00035-0')]
    [TestCase('Test1','S0002-9270(99)00035-1')]
    [TestCase('Test2','S0002-9270(99)00035-2')]
    [TestCase('Test3','S0002-9270(99)00035-3')]
    [TestCase('Test4','S0002-9270(99)000353')]
    [TestCase('Test5','S00029270(99)00035-3')]
    [TestCase('Test6','S00-02-9270(99)00035-3')]
    [TestCase('Test7','S00-02-92-70(99)00035-3')]
    procedure TestCDS(const AValue : string);
  end;

implementation

const
  cFieldname = 'AFieldName';

procedure TClientDataSetTest.Setup;
var
  fd: TFieldDef;
begin
  fCDS := TClientDataSet.Create(nil);
  fd := fCDS.FieldDefs.AddFieldDef;
  fd.Name := cFieldname;
  fd.DataType := ftString;
  fCDS.CreateDataSet;
end;

procedure TClientDataSetTest.TearDown;
begin
  fCDS.Free;
end;

procedure TClientDataSetTest.TestCDS(const AValue : string);
begin
  fCDS.Insert;
  fCDS.Edit;
  fCDS.FieldByName(cFieldname).AsString := AValue;
  fCDS.Post;
  Assert.AreEqual(AValue, fCDS.FieldByName(cFieldname).AsString, 'Assignment failed.');
end;

initialization
  TDUnitX.RegisterTestFixture(TClientDataSetTest);

end.

 

Edited December 31, 2023 by Navid Madani
Minor edits

[Navid Madani 1]

Reported as bug: RSP-44009.

[Dmitry Arefiev 99]

fd.Size := 50;

[Navid Madani 1]

1 hour ago, Dmitry Arefiev said:

fd.Size := 50;

Thank Dmitry, but I did not grasp the implication of your terse comment. The size of string fields needs to be set?

[Cristian Peța 94]

4 minutes ago, Navid Madani said:

The size of string fields needs to be set?

ftString size is default to 20. If you want not to set the size then you can use ftMemo.

[Navid Madani 1]

15 minutes ago, Cristian Peța said:

ftString size is default to 20. If you want not to set the size then you can use ftMemo.

Duh! Thank you! I should have tested adding other characters on the tests.  When the REST API added the hyphens, that's when everything broke down ...

[Navid Madani 1]

On 1/1/2024 at 9:21 PM, Navid Madani said:

Reported as bug: RSP-44009.

Retracted.