HighScoreTableTest.cpp

#include "AutomationTest.h"
#include "HighScoreTable.h"

IMPLEMENT_SIMPLE_AUTOMATION_TEST(FHighScoreTableTest, "UnitTests.HighScoreTable", EAutomationTestFlags::EditorContext | EAutomationTestFlags::EngineFilter)

#define Describe(Desc) Description = Desc;
#define GivenAnEmptyTable() Table = NewObject<UHighScoreTable>(); Scores.Empty();
#define GivenATableContaining(...) GivenAnEmptyTable() Scores.Append(TArray<int32> { __VA_ARGS__}); for (int32 Value : Scores) Table->AddPotentialHighScore(Value);
#define WhenScoreIsAdded(X) Result=Table->AddPotentialHighScore(X);
#define ThenIndexOfMostRecentEntryIs(Expected) TestEqual(TEXT("Most recent index"), Result, Expected);
#define ThenTheSizeOfTheTableIs(Expected) TestEqual(TEXT("Size of the table"), Table->GetTable().Num(), Expected);

bool FHighScoreTableTest::RunTest(const FString& Parameters)
{
	FString Description;
	UHighScoreTable* Table;
	int32 Result;
	TArray<int32> Scores;

	Describe("First entry is in first position");
	GivenAnEmptyTable();
	WhenScoreIsAdded(1);
	ThenIndexOfMostRecentEntryIs(0);

	Describe("Second entry in single-element table");
	GivenATableContaining(2);
	WhenScoreIsAdded(1);
	ThenIndexOfMostRecentEntryIs(1);

	Describe("New first entry in single-element table")
	GivenATableContaining(1);
	WhenScoreIsAdded(2);
	ThenIndexOfMostRecentEntryIs(0);

	Describe("Lowest item is last in the list");
	GivenATableContaining(5,4,3,2);
	WhenScoreIsAdded(1);
	ThenIndexOfMostRecentEntryIs(4);

	Describe("Low score is rejected");
	GivenATableContaining(5, 4, 3, 2, 1);
	WhenScoreIsAdded(0);
	ThenIndexOfMostRecentEntryIs(-1);

	Describe("New high score");
	GivenATableContaining(5, 4, 3, 2, 1);
	WhenScoreIsAdded(6);
	ThenIndexOfMostRecentEntryIs(0);

	Describe("The high score table should never have more than five entries when the score is added to the top.");
	GivenATableContaining(5, 4, 3, 2, 1);
	WhenScoreIsAdded(6);
	ThenTheSizeOfTheTableIs(5);

	Describe("The high score table should never have more than five entries when the score would be added to the bottom");
	GivenATableContaining(6, 5, 4, 3, 2);
	WhenScoreIsAdded(1);
	ThenTheSizeOfTheTableIs(5);

	return true;
}

#undef Describe
#undef GivenAnEmptyTable
#undef GivenATableContaining
#undef WhenScoreIsAdded
#undef ThenIndexOfMostRecentEntryIs
#undef ThenTheSizeOfTheTableIs