TEST() [6/7]

TEST	(	ARingCCC	,
		power_and_invert	)

Definition at line 248 of file ARingCCCTest.cpp.

{
  M2::ARingCCC C(100);
  ARingElementGenerator<M2::ARingCCC> gen(C);
  M2::ARingCCC::ElementType a, b, c, d;
  C.init(a);
  C.init(b);
  C.init(c);
  C.init(d);
  mpz_t gmp1;
  mpz_init(gmp1);
  for (int i = 0; i < ntrials; i++)
    {
      gen.nextElement(a);
      // TODO: what should the answer here be?
      // EXPECT_TRUE(R->is_equal(R->power(a, 0), R->one())); // 0^0 == 1 too?
      C.power(b, a, 1);
      EXPECT_TRUE(C.is_equal(b, a));
 
      int e1 = rawRandomInt(10) + 1;
      int e2 = rawRandomInt(10) + 1;
      C.power(b, a, e1);
      C.power(c, a, e2);
      C.power(d, a, e1 + e2);
      C.mult(c, b, c);
      EXPECT_TRUE(almostEqual(C, 90, c, d)); /* exponentiation gives
                                                relatively small number
                                                of correct digits */
 
      // Make sure that powers via mpz work (at least for small exponents)
      mpz_set_si(gmp1, e1);
      C.power_mpz(d, a, gmp1);
      EXPECT_TRUE(C.is_equal(d, b));
    }
  mpz_clear(gmp1);
  C.clear(d);
  C.clear(c);
  C.clear(b);
  C.clear(a);
}

References almostEqual(), M2::ARingCCC::clear(), M2::ARingCCC::init(), M2::ARingCCC::is_equal(), M2::ARingCCC::mult(), ARingElementGenerator< RingType >::nextElement(), ntrials, M2::ARingCCC::power(), M2::ARingCCC::power_mpz(), and rawRandomInt().