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unit BufDatasetToolsUnit;
{ Sets up bufdataset for testing.
Tests expect Get*Dataset to return a dataset with structure and test data, but closed.
A closed BufDataset normally has no data, so these tests won't work.
To circumvent this, this unit saves the dataset contents to file and reloads them on opening
using the BufDataset persistence mechanism.
}
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, toolsunit,
db,
BufDataset;
type
{ TbufdatasetDBConnector }
TbufdatasetDBConnector = class(TDBConnector)
private
FUniDirectional: boolean;
protected
procedure CreateNDatasets; override;
procedure CreateFieldDataset; override;
procedure DropNDatasets; override;
procedure DropFieldDataset; override;
Function InternalGetNDataset(n : integer) : TDataset; override;
Function InternalGetFieldDataset : TDataSet; override;
procedure SetTestUniDirectional(const AValue: boolean); override;
function GetTestUniDirectional: boolean; override;
end;
implementation
uses
StrUtils, FmtBCD;
type
{ TPersistentBufDataSet }
TPersistentBufDataSet=class(TBufDataset)
private
TempFileName:string;
public
destructor Destroy; override;
end;
{ TPersistentBufDataSet }
destructor TPersistentBufDataSet.Destroy;
begin
Close; // no locks on TempFileName
DeleteFile(TempFileName);
inherited Destroy;
end;
{ TbufdatasetDBConnector }
procedure TbufdatasetDBConnector.CreateNDatasets;
begin
// All datasets are created in InternalGet*Dataset
end;
procedure TbufdatasetDBConnector.CreateFieldDataset;
begin
// All datasets are created in InternalGet*Dataset
end;
procedure TbufdatasetDBConnector.DropNDatasets;
begin
// All datasets are created in InternalGet*Dataset and cleaned up when destroyed
end;
procedure TbufdatasetDBConnector.DropFieldDataset;
begin
// All datasets are created in InternalGet*Dataset and cleaned up when destroyed
end;
function TbufdatasetDBConnector.InternalGetNDataset(n: integer): TDataset;
var BufDataset : TPersistentBufDataSet;
i : integer;
begin
BufDataset := TPersistentBufDataSet.Create(nil);
with BufDataset do
begin
Name := 'NDataset';
FieldDefs.Add('ID',ftInteger);
FieldDefs.Add('NAME',ftString,50);
CreateDataset;
Open;
for i := 1 to n do
begin
Append;
FieldByName('ID').AsInteger := i;
FieldByName('NAME').AsString := 'TestName' + inttostr(i);
Post;
end;
MergeChangeLog;
TempFileName:=GetTempFileName;
FileName:=TempFileName;
Close; // Save data into file
end;
Result := BufDataset;
end;
function TbufdatasetDBConnector.InternalGetFieldDataset : TDataSet;
var BufDataset : TPersistentBufDataSet;
i : integer;
begin
// Values >= 24:00:00.000 can't be handled by StrToTime function
testTimeValues[2] := '23:59:59.000';
testTimeValues[3] := '23:59:59.003';
BufDataset := TPersistentBufDataSet.Create(nil);
with BufDataset do
begin
Name := 'FieldDataset';
FieldDefs.Add('ID',ftInteger);
FieldDefs.Add('FSTRING',ftString,10);
FieldDefs.Add('FSMALLINT',ftSmallint);
FieldDefs.Add('FINTEGER',ftInteger);
FieldDefs.Add('FWORD',ftWord);
FieldDefs.Add('FBOOLEAN',ftBoolean);
FieldDefs.Add('FFLOAT',ftFloat);
FieldDefs.Add('FCURRENCY',ftCurrency);
FieldDefs.Add('FBCD',ftBCD);
FieldDefs.Add('FDATE',ftDate);
FieldDefs.Add('FTIME',ftTime);
FieldDefs.Add('FDATETIME',ftDateTime);
FieldDefs.Add('FBLOB',ftBlob);
FieldDefs.Add('FMEMO',ftMemo);
FieldDefs.Add('FLARGEINT',ftLargeint);
FieldDefs.Add('FFIXEDCHAR',ftFixedChar,10);
FieldDefs.Add('FFMTBCD',ftFmtBCD);
CreateDataset;
Open;
for i := 0 to testValuesCount-1 do
begin
Append;
FieldByName('ID').AsInteger := i;
FieldByName('FSTRING').AsString := testStringValues[i];
FieldByName('FSMALLINT').AsInteger := testSmallIntValues[i];
FieldByName('FINTEGER').AsInteger := testIntValues[i];
FieldByName('FWORD').AsInteger := testWordValues[i];
FieldByName('FBOOLEAN').AsBoolean := testBooleanValues[i];
FieldByName('FFLOAT').AsFloat := testFloatValues[i];
FieldByName('FCURRENCY').AsCurrency := testCurrencyValues[i];
FieldByName('FBCD').AsCurrency := testCurrencyValues[i];
FieldByName('FDATE').AsDateTime := StrToDateTime(testDateValues[i], Self.FormatSettings);
FieldByName('FTIME').AsDateTime := StrToTime(testTimeValues[i], Self.FormatSettings);
FieldByName('FDATETIME').AsDateTime := StrToDateTime(testValues[ftDateTime,i], Self.FormatSettings);
FieldByName('FBLOB').AsString := testStringValues[i];
FieldByName('FMEMO').AsString := testStringValues[i];
FieldByName('FLARGEINT').AsLargeInt := testLargeIntValues[i];
FieldByName('FFIXEDCHAR').AsString := PadRight(testStringValues[i], 10);
FieldByName('FFMTBCD').AsBCD := StrToBCD(testFmtBCDValues[i], Self.FormatSettings);
Post;
end;
MergeChangeLog;
TempFileName:=GetTempFileName;
FileName:=TempFileName;
Close; // Save data into file
// When data are loaded from file, bidirectional is checked
// so unidirectional bufdataset can't be tested here
UniDirectional := TestUniDirectional;
end;
Result := BufDataset;
end;
procedure TbufdatasetDBConnector.SetTestUniDirectional(const AValue: boolean);
begin
FUniDirectional := AValue;
end;
function TbufdatasetDBConnector.GetTestUniDirectional: boolean;
begin
Result := FUniDirectional;
end;
initialization
RegisterClass(TbufdatasetDBConnector);
end.
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