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// PieceRotation.cpp
// Implements the tests for cPiece::cConnector::eDirection rotations
#include "Globals.h"
#include <exception>
#include <map>
#include "Generating/PieceGenerator.h"
static cPiece::cConnector::eDirection g_AllDirections[] =
{
cPiece::cConnector::dirXM,
cPiece::cConnector::dirXP,
cPiece::cConnector::dirYM,
cPiece::cConnector::dirYP,
cPiece::cConnector::dirZM,
cPiece::cConnector::dirZP,
cPiece::cConnector::dirYM_XM_ZM,
cPiece::cConnector::dirYM_XM_ZP,
cPiece::cConnector::dirYM_XP_ZM,
cPiece::cConnector::dirYM_XP_ZP,
cPiece::cConnector::dirYP_XM_ZM,
cPiece::cConnector::dirYP_XM_ZP,
cPiece::cConnector::dirYP_XP_ZM,
cPiece::cConnector::dirYP_XP_ZP,
};
class cTestFailure: public std::exception
{
public:
cTestFailure(const char * a_Expression, const char * a_FileName, const int a_Line):
std::exception(),
m_Expression(a_Expression),
m_FileName(a_FileName),
m_Line(a_Line)
{
}
const std::string m_Expression;
const std::string m_FileName;
const int m_Line;
};
#define EXPECT(X) if (!(X)) \
{ \
ASSERT(X); \
throw cTestFailure(#X, __FILE__, __LINE__); \
}
/** Tests that rotating a direction in one way and then the opposite way produces the original direction. */
static void testBackAndForth()
{
for (size_t i = 0; i < ARRAYCOUNT(g_AllDirections); ++i)
{
auto rotated = cPiece::cConnector::RotateDirectionCW(g_AllDirections[i]);
auto back = cPiece::cConnector::RotateDirectionCCW(rotated);
EXPECT(back == g_AllDirections[i]);
}
for (size_t i = 0; i < ARRAYCOUNT(g_AllDirections); ++i)
{
auto rotated = cPiece::cConnector::RotateDirectionCCW(g_AllDirections[i]);
auto back = cPiece::cConnector::RotateDirectionCW(rotated);
EXPECT(back == g_AllDirections[i]);
}
}
/** Tests rotating the direction 360 degrees. */
static void testFullRotation()
{
// Rotate 90 degrees CCW four times:
for (size_t i = 0; i < ARRAYCOUNT(g_AllDirections); ++i)
{
auto d = g_AllDirections[i];
for (int j = 0; j < 4; ++j)
{
d = cPiece::cConnector::RotateDirectionCCW(d);
}
EXPECT(d == g_AllDirections[i]);
}
// Rotate 90 degrees CW four times:
for (size_t i = 0; i < ARRAYCOUNT(g_AllDirections); ++i)
{
auto d = g_AllDirections[i];
for (int j = 0; j < 4; ++j)
{
d = cPiece::cConnector::RotateDirectionCW(d);
}
EXPECT(d == g_AllDirections[i]);
}
// Rotate 180 degrees twice:
for (size_t i = 0; i < ARRAYCOUNT(g_AllDirections); ++i)
{
auto d = g_AllDirections[i];
d = cPiece::cConnector::RotateDirection(d);
d = cPiece::cConnector::RotateDirection(d);
EXPECT(d == g_AllDirections[i]);
}
}
/** Tests that no two values are rotated onto the same destination value. */
template <class Fn>
static void testPermutation(Fn & a_Fn)
{
std::map<cPiece::cConnector::eDirection, int> numDest;
for (size_t i = 0; i < ARRAYCOUNT(g_AllDirections); ++i)
{
auto d = a_Fn(g_AllDirections[i]);
EXPECT(numDest[d] == 0);
numDest[d] = 1;
}
}
int main(void)
{
LOG("PieceRotation test starting.");
try
{
testBackAndForth();
testFullRotation();
testPermutation(cPiece::cConnector::RotateDirection);
testPermutation(cPiece::cConnector::RotateDirectionCW);
testPermutation(cPiece::cConnector::RotateDirectionCCW);
}
catch (const cTestFailure & f)
{
LOGERROR("Test failed:\tExpression: %s\n\tFile: %s (%d)", f.m_Expression.c_str(), f.m_FileName.c_str(), f.m_Line);
return 1;
}
catch (const std::exception & exc)
{
LOGERROR("Exception caught: %s", exc.what());
return 2;
}
LOG("PieceRotation test succeeded.");
return 0;
}
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