Added solution for "Day 21: Step Counter", part 1

tests/AdventOfCodeFPCUnit.lpi

@@ -124,6 +124,10 @@
         <Filename Value="UPulsePropagationTestCases.pas"/>
         <IsPartOfProject Value="True"/>
       </Unit>
+      <Unit>
+        <Filename Value="UStepCounterTestCases.pas"/>
+        <IsPartOfProject Value="True"/>
+      </Unit>
     </Units>
   </ProjectOptions>
   <CompilerOptions>

tests/AdventOfCodeFPCUnit.lpr

@@ -8,7 +8,7 @@ uses
   UHauntedWastelandTestCases, UMirageMaintenanceTestCases, UPipeMazeTestCases, UCosmicExpansionTestCases,
   UHotSpringsTestCases, UPointOfIncidenceTestCases, UParabolicReflectorDishTestCases, ULensLibraryTestCases,
   UFloorWillBeLavaTestCases, UClumsyCrucibleTestCases, ULavaductLagoonTestCases, UAplentyTestCases,
-UPulsePropagationTestCases;
+  UPulsePropagationTestCases, UStepCounterTestCases;
 
 {$R *.res}
 

tests/UStepCounterTestCases.pas

@@ -0,0 +1,82 @@
+{
+  Solutions to the Advent Of Code.
+  Copyright (C) 2023  Stefan Müller
+
+  This program is free software: you can redistribute it and/or modify it under
+  the terms of the GNU General Public License as published by the Free Software
+  Foundation, either version 3 of the License, or (at your option) any later
+  version.
+
+  This program is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program.  If not, see <http://www.gnu.org/licenses/>.
+}
+
+unit UStepCounterTestCases;
+
+{$mode ObjFPC}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, fpcunit, testregistry, USolver, UBaseTestCases, UStepCounter;
+
+type
+
+  { TStepCounterFullDataTestCase }
+
+  TStepCounterFullDataTestCase = class(TEngineBaseTest)
+  protected
+    function CreateSolver: ISolver; override;
+  published
+    procedure TestPart1;
+  end;
+
+  { TStepCounterMax6ExampleTestCase }
+
+  TStepCounterMax6ExampleTestCase = class(TExampleEngineBaseTest)
+  protected
+    function CreateSolver: ISolver; override;
+  published
+    procedure TestPart1;
+  end;
+
+implementation
+
+{ TStepCounterFullDataTestCase }
+
+function TStepCounterFullDataTestCase.CreateSolver: ISolver;
+begin
+  Result := TStepCounter.Create;
+end;
+
+procedure TStepCounterFullDataTestCase.TestPart1;
+begin
+  AssertEquals(3809, FSolver.GetResultPart1);
+end;
+
+{ TStepCounterMax6ExampleTestCase }
+
+function TStepCounterMax6ExampleTestCase.CreateSolver: ISolver;
+var
+  solver: TStepCounter;
+begin
+  solver := TStepCounter.Create;
+  solver.MaxSteps := 6;
+  Result := solver;
+end;
+
+procedure TStepCounterMax6ExampleTestCase.TestPart1;
+begin
+  AssertEquals(16, FSolver.GetResultPart1);
+end;
+
+initialization
+
+  RegisterTest(TStepCounterFullDataTestCase);
+  RegisterTest(TStepCounterMax6ExampleTestCase);
+end.
+