void compareVertexDataMembers(CbmVertex& test, Double_t x, Double_t y, Double_t z,
			      Double_t chi2, Int_t ndf, Int_t ntracks, Double_t* cov)
{
  Int_t retValInt{-111};
  Double_t retValDouble{-111.};

  retValDouble = test.GetX();
  EXPECT_FLOAT_EQ(x, retValDouble);

  retValDouble = test.GetY();
  EXPECT_FLOAT_EQ(y, retValDouble);

  retValDouble = test.GetZ();
  EXPECT_FLOAT_EQ(z, retValDouble);

  retValDouble = test.GetChi2();
  EXPECT_FLOAT_EQ(chi2, retValDouble);

  retValInt = test.GetNDF();
  EXPECT_EQ(ndf, retValInt);

  retValInt = test.GetNTracks();
  EXPECT_EQ(ntracks, retValInt);

  if (cov) {
    retValDouble = test.GetCovariance(0,0);
    EXPECT_FLOAT_EQ(cov[0], retValDouble);

    retValDouble = test.GetCovariance(0,1);
    EXPECT_FLOAT_EQ(cov[1], retValDouble);

    retValDouble = test.GetCovariance(0,2);
    EXPECT_FLOAT_EQ(cov[2], retValDouble);

    retValDouble = test.GetCovariance(1,1);
    EXPECT_FLOAT_EQ(cov[3], retValDouble);

    retValDouble = test.GetCovariance(1,2);
    EXPECT_FLOAT_EQ(cov[4], retValDouble);

    retValDouble = test.GetCovariance(2,2);
    EXPECT_FLOAT_EQ(cov[5], retValDouble);
  }
}