def test_pow():
assert oclcode(x**0.5) == "sqrt(x)"
assert oclcode(x**Rational(1, 3)) == "cbrt(x)"
assert oclcode(x**(-1)) == "1.0/x"
assert oclcode(i**(-1)) == "1.0/i"
assert oclcode(x**9) == "pown(x, 9)"
assert oclcode(x**(-3)) == "pown(x, -3)"
assert oclcode(x**3.2) == "powr(x, 3.2)"
assert oclcode(x**(-2.7)) == "pow(x, -2.7)"
def test_functions_basic():
assert oclcode(abs(i)) == "abs(i)"
assert oclcode(abs(x)) == "fabs(x)"
assert oclcode(log(x)) == "log(x)"
assert oclcode(log(x, 2)) == "log2(x)"
assert oclcode(log(x, 10)) == "log10(x)"
assert oclcode(log(x, 3)) == "log(x)/log(3)"
def test_functions_special():
assert oclcode(erf(x)) == "erf(x)"
assert oclcode(erfc(x)) == "erfc(x)"
assert oclcode(gamma(x)) == "tgamma(x)"
assert oclcode(loggamma(x)) == "lgamma(x)"
def test_functions_inserted():
assert oclcode(2**x) == "exp2(x)"
assert oclcode(10**x) == "exp10(x)"
assert oclcode(sqrt(x**2 + y**2)) == "hypot(x, y)"
def test_constants():
assert oclcode(exp(1)) == "M_E"
assert oclcode(pi) == "M_PI"
assert oclcode(oo) == "INFINITY"
assert oclcode(-oo) == "-INFINITY"
