freepascal.compiler/packages/fcl-db/tests/testspecifictbufdataset.pas

unit TestSpecificTBufDataset;

{
  Unit tests which are specific to stand-alone TBufDataset-datasets. (So not
  for derived datasets like TQuery )
}

{$IFDEF FPC}
  {$mode Delphi}{$H+}
{$ENDIF}

interface

uses
{$IFDEF FPC}
  fpcunit, testregistry, BufDataset,
{$ELSE FPC}
  TestFramework,
{$ENDIF FPC}
  Classes, SysUtils, db, ToolsUnit;

type

  { TTestSpecificTBufDataset }

  { TMyBufDataset }

  TMyBufDataset = Class(TBufDataset)
  protected
    procedure LoadBlobIntoBuffer(FieldDef: TFieldDef; ABlobBuf: PBufBlobField); override;
  end;


  TTestSpecificTBufDataset = class(TDBBasicsTestCase)
  private
    FAfterScrollCount:integer;
    FBeforeScrollCount:integer;
    procedure DoAfterScrollCount(DataSet: TDataSet);
    procedure DoBeforeScrollCount(DataSet: TDataSet);
    procedure TestDataset(ABufDataset: TBufDataset; AutoInc: boolean = false);
    function GetAutoIncDataset: TBufDataset;
    procedure IntTestAutoIncFieldStreaming(XML: boolean);
  protected
    procedure SetUp; override;
    procedure TearDown; override;
  published
    procedure CreateDatasetFromFielddefs;
    procedure CreateDatasetFromFields;
    procedure TestOpeningNonExistingDataset;
    procedure TestCreationDatasetWithCalcFields;
    procedure TestAutoIncField;
    procedure TestAutoIncFieldStreaming;
    procedure TestAutoIncFieldStreamingXML;
    Procedure TestLocateScrollEventCount;
    Procedure TestLookupScrollEventCount;
    Procedure TestRecordCount;
    Procedure TestClear;
    procedure TestCopyFromDataset; //is copied dataset identical to original?
    procedure TestCopyFromDatasetMoved; //move record then copy. Is copy identical? Has record position changed?
  end;

implementation

uses
{$ifdef fpc}
//
{$endif fpc}
  variants,
  FmtBCD;

{ TMyBufDataset }

procedure TMyBufDataset.LoadBlobIntoBuffer(FieldDef: TFieldDef; ABlobBuf: PBufBlobField);
begin
  Raise ENotImplemented.Create('LoadBlobIntoBuffer not implemented');
end;

{ TTestSpecificTBufDataset }

procedure TTestSpecificTBufDataset.TestDataset(ABufDataset: TBufDataset;
  AutoInc: boolean);
var
  i  : integer;
begin
  for i := 1 to 10 do
    begin
    ABufDataset.Append;
    if not AutoInc then
      ABufDataset.FieldByName('ID').AsInteger := i;
    ABufDataset.FieldByName('NAME').AsString := 'TestName' + inttostr(i);
    ABufDataset.Post;
    end;
  ABufDataset.first;
  for i := 1 to 10 do
    begin
    CheckEquals(i,ABufDataset.fieldbyname('ID').asinteger);
    CheckEquals('TestName' + inttostr(i),ABufDataset.fieldbyname('NAME').AsString);
    ABufDataset.next;
    end;
  CheckTrue(ABufDataset.EOF);
end;

procedure TTestSpecificTBufDataset.DoAfterScrollCount(DataSet: TDataSet);
begin
  Inc(FAfterScrollCount);
end;

procedure TTestSpecificTBufDataset.DoBeforeScrollCount(DataSet: TDataSet);
begin
  Inc(FBeforeScrollCount);
end;

function TTestSpecificTBufDataset.GetAutoIncDataset: TBufDataset;
var
  ds : TBufDataset;
  f: TField;
begin
  ds := TMyBufDataset.Create(nil);
  F := TAutoIncField.Create(ds);
  F.FieldName:='ID';
  F.DataSet:=ds;
  F := TStringField.Create(ds);
  F.FieldName:='NAME';
  F.DataSet:=ds;
  F.Size:=50;
  DS.CreateDataset;

  TestDataset(ds,True);
  result := ds;
end;

procedure TTestSpecificTBufDataset.IntTestAutoIncFieldStreaming(XML: boolean);
var
  ds : TBufDataset;
  fn: string;
begin
  ds := GetAutoIncDataset;
  fn := GetTempFileName;
  if xml then
    ds.SaveToFile(fn,dfXML)
  else
    ds.SaveToFile(fn);
  DS.Close;
  ds.Free;

  ds := TMyBufDataset.Create(nil);
  ds.LoadFromFile(fn);
  ds.Last;
  CheckEquals(10,ds.FieldByName('Id').AsInteger);
  ds.Append;
  ds.FieldByName('NAME').asstring := 'Test';
  ds.Post;
  CheckEquals(11,ds.FieldByName('Id').AsInteger);
  ds.Free;

  DeleteFile(fn);
end;

procedure TTestSpecificTBufDataset.SetUp;
begin
  FAfterScrollCount:=0;
  FBeforeScrollCount:=0;
  DBConnector.StartTest(TestName);
end;

procedure TTestSpecificTBufDataset.TearDown;
begin
  DBConnector.StopTest(TestName);
end;

procedure TTestSpecificTBufDataset.CreateDatasetFromFielddefs;
var ds : TBufDataset;
begin
  ds := TMyBufDataset.Create(nil);
  DS.FieldDefs.Add('ID',ftInteger);
  DS.FieldDefs.Add('NAME',ftString,50);
  DS.CreateDataset;
  TestDataset(ds);
  DS.Close;
  DS.CreateDataset;
  TestDataset(ds);
end;

procedure TTestSpecificTBufDataset.CreateDatasetFromFields;
var ds : TBufDataset;
    f: TField;
begin
  ds := TMyBufDataset.Create(nil);
  F := TIntegerField.Create(ds);
  F.FieldName:='ID';
  F.DataSet:=ds;
  F := TStringField.Create(ds);
  F.FieldName:='NAME';
  F.DataSet:=ds;
  F.Size:=50;
  DS.CreateDataset;
  TestDataset(ds);
  DS.Close;
  DS.CreateDataset;
  TestDataset(ds);
end;

procedure TTestSpecificTBufDataset.TestOpeningNonExistingDataset;
var ds : TBufDataset;
    f: TField;
begin
  ds := TMyBufDataset.Create(nil);
  F := TIntegerField.Create(ds);
  F.FieldName:='ID';
  F.DataSet:=ds;

  CheckException(ds.Open,EDatabaseError);
  ds.Free;

  ds := TMyBufDataset.Create(nil);
  DS.FieldDefs.Add('ID',ftInteger);

  CheckException(ds.Open,EDatabaseError);
  ds.Free;
end;

procedure TTestSpecificTBufDataset.TestCreationDatasetWithCalcFields;
var ds : TBufDataset;
    f: TField;
    i: integer;
begin
  ds := TMyBufDataset.Create(nil);
  try
    F := TIntegerField.Create(ds);
    F.FieldName:='ID';
    F.Required:=True;
    F.DataSet:=ds;
    F := TStringField.Create(ds);
    F.FieldName:='NAME';
    F.Required:=False;
    F.DataSet:=ds;
    F.Size:=50;

    F := TStringField.Create(ds);
    F.FieldKind:=fkCalculated;
    F.FieldName:='NAME_CALC';
    F.DataSet:=ds;
    F.Size:=50;

    F := TStringField.Create(ds);
    F.FieldKind:=fkLookup;
    F.FieldName:='NAME_LKP';
    F.LookupDataSet:=DBConnector.GetNDataset(5);
    F.KeyFields:='ID';
    F.LookupKeyFields:='ID';
    F.LookupResultField:='NAME';
    F.DataSet:=ds;
    F.Size:=50;

    DS.CreateDataset;

    TestDataset(ds);

    CheckTrue(ds.FieldDefs[0].Required, 'Required');
    CheckFalse(ds.FieldDefs[1].Required, 'not Required');
    for i := 0 to ds.FieldDefs.Count-1 do
      begin
      CheckNotEquals(ds.FieldDefs[i].Name,'NAME_CALC');
      CheckNotEquals(ds.FieldDefs[i].Name,'NAME_LKP');
      end;
    DS.Close;
  finally
    ds.Free;
  end;
end;

procedure TTestSpecificTBufDataset.TestAutoIncField;
var
  ds : TBufDataset;
begin
  ds := GetAutoIncDataset;
  DS.Close;
  ds.Free;
end;

procedure TTestSpecificTBufDataset.TestAutoIncFieldStreaming;
begin
  IntTestAutoIncFieldStreaming(false);
end;

procedure TTestSpecificTBufDataset.TestAutoIncFieldStreamingXML;
begin
  IntTestAutoIncFieldStreaming(true);
end;

procedure TTestSpecificTBufDataset.TestLocateScrollEventCount;

begin
  with DBConnector.GetNDataset(10) as TBufDataset do
    begin
    Open;
    AfterScroll:=DoAfterScrollCount;
    BeforeScroll:=DoBeforeScrollCount;
    Locate('ID',5,[]);
    AssertEquals('Current record OK',5,FieldByName('ID').AsInteger);
    AssertEquals('After scroll count',1,FAfterScrollCount);
    AssertEquals('After scroll count',1,FBeforeScrollCount);
    end;
end;


procedure TTestSpecificTBufDataset.TestLookupScrollEventCount;

Var
  V : Variant;
  S : String;
  ID : Integer;

begin
  with DBConnector.GetNDataset(10) as TBufDataset do
    begin
    Open;
    ID:=FieldByName('ID').AsInteger;
    AfterScroll:=DoAfterScrollCount;
    BeforeScroll:=DoBeforeScrollCount;
    V:=Lookup('ID',5,'NAME');
    AssertTrue('Not null',Null<>V);
    S:=V;
    AssertEquals('Result','TestName5',S);
    AssertEquals('After scroll count',0,FAfterScrollCount);
    AssertEquals('After scroll count',0,FBeforeScrollCount);
    AssertEquals('Current record unchanged',ID,FieldByName('ID').AsInteger);
    end;
end;

procedure TTestSpecificTBufDataset.TestRecordCount;
var
  BDS:TBufDataSet;

begin
  BDS:=TMyBufDataset.Create(nil);
  BDS.FieldDefs.Add('ID',ftLargeint);
  BDS.CreateDataSet;
  BDS.AppendRecord([1]);
  BDS.AppendRecord([2]);
  BDS.AppendRecord([3]);
  BDS.Close;
  AssertEquals('IsEmpty: ',True,BDS.IsEmpty);
  AssertEquals('RecordCount: ',0,BDS.RecordCount);
end;

procedure TTestSpecificTBufDataset.TestClear;

const
  testValuesCount=3;
var
  i: integer;
begin
  with DBConnector.GetNDataset(10) as TBufDataset do
    begin
    Open;
    Clear;
    AssertTrue('Dataset Closed',Not Active);
    AssertEquals('No fields',0,Fields.Count);
    AssertEquals('No fielddefs',0,FieldDefs.Count);
    // test after FieldDefs are Cleared, if internal structures are updated properly
    // create other FieldDefs
    FieldDefs.Add('Fs', ftString, 20);
    FieldDefs.Add('Fi', ftInteger);
    FieldDefs.Add('Fi2', ftInteger);
    // use only Open without CreateTable
    CreateDataset;
    AssertTrue('Empty dataset',IsEmpty);
    // add some data
    for i:=1 to testValuesCount do
      AppendRecord([TestStringValues[i], TestIntValues[i], TestIntValues[i]]);
    // check data
    AssertEquals('Record count',testValuesCount, RecordCount);
    First;
    for i:=1 to testValuesCount do
    begin
      AssertEquals('Field FS, Record '+InttoStr(i),TestStringValues[i], FieldByName('Fs').AsString);
      AssertEquals('Field Fi2, Record '+InttoStr(i),TestIntValues[i], FieldByName('Fi2').AsInteger);
      Next;
    end;
    CheckTrue(Eof);
  end;
end;

procedure TTestSpecificTBufDataset.TestCopyFromDataset;
var bufds1, bufds2: TBufDataset;
begin
  bufds1:=DBConnector.GetFieldDataset as TBufDataset;
  bufds2:=DBConnector.GetNDataset(0) as TBufDataset;

  bufds1.Open;
  bufds2.CopyFromDataset(bufds1);
  CheckFieldDatasetValues(bufds2);
end;

procedure TTestSpecificTBufDataset.TestCopyFromDatasetMoved;
var
  bufds1, bufds2: TBufDataset;
  CurrentID,NewID: integer;
begin
  bufds1:=DBConnector.GetFieldDataset as TBufDataset;
  bufds2:=DBConnector.GetNDataset(0) as TBufDataset;

  bufds1.Open;
  bufds1.Next; //this should not influence the copydataset step.
  CurrentID:=bufds1.FieldByName('ID').AsInteger;
  bufds2.CopyFromDataset(bufds1);
  CheckFieldDatasetValues(bufds2);
  NewID:=bufds1.FieldByName('ID').AsInteger;
  AssertEquals('Mismatch between ID field contents - the record has moved.',CurrentID,NewID);
end;

initialization
{$ifdef fpc}

  if uppercase(dbconnectorname)='BUFDATASET' then
    begin
    RegisterTestDecorator(TDBBasicsTestSetup, TTestSpecificTBufDataset);
    end;
{$endif fpc}
end.