Delphi TestInsight: when supporting it, test if it is running at all. Same library has a deferer pattern.
Posted by jpluimers on 2021/04/08
Interesting idea by Cesar Romero (who has some interesting repositories at [WayBack] cesarliws (Cesar Romero) · GitHub and [WayBack] cesarliws — Bitbucket) when using TestInsight for Delphi: first test if TestInsight is running at all: [WayBack] foundation-4-delphi/Foundation.Test.Utils.pas at master · cesarliws/foundation-4-delphi · GitHub.
function IsTestInsightRunning: Boolean; {$IFDEF TESTINSIGHT} var TestInsightClient: ITestInsightClient; begin TestInsightClient := TTestInsightRestClient.Create; TestInsightClient.StartedTesting(0); Result := not TestInsightClient.HasError; end; {$ELSE} begin Result := False; end; {$ENDIF} procedure RunRegisteredTests; begin ReportMemoryLeaksOnShutdown := True; {$IFDEF TESTINSIGHT} if IsTestInsightRunning then TestInsight.DUnit.RunRegisteredTests else {$ENDIF} DUnitTestRunner.RunRegisteredTests; end;
Another interesting bit from the same library is the deferer pattern (which is different from the promise pattern!) in [WayBack] foundation-4-delphi/Foundation.System.pas at master · cesarliws/foundation-4-delphi · GitHub with the below code examples.
I think a better name might be DeferExecutionToEndOfScopeFor.
procedure ProcessFile (const FileName: string); var File: TFile; begin File: = TFile.Open (FileName); Defer (File.Close); while not File.EOF begin // ... process file end; end; // Defer will be executed here [File.Close] procedure ExecSql (const ConnectionString, Sql: string); var Database: TDatabase; Exec: IDeferred; Query: TQuery; begin Database: = TDatabase.Create (ConnectionString); Exec: = Defer (Database.Free); Database.Open; Exec.Defer (Database.Close); Query: = Database.Query (SQL); Exec.Defer (Query.Free); Exec.Defer (Query.Close); if Query.IsEmpty then Exit; while not Query.EOF begin // ... process query end; Exec.Defer ( procedure begin Writeln ('Finished ExecSql'); end ); end; // Defer will be executed here [Writeln, Query.Close, Database.Close, Database.Free]
–jeroen
The Wiert Corner - irregular stream of stuff 
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