from temperatures import *
import math

def test_f_to_c():
    value = f_to_c(32)
    success = math.fabs(value - 0) < 1e-13
    msg = "32 F should be 0 C, got %f C" % (value)

    assert success, msg

def test_f_to_c2():
    value = f_to_c(70)
    success = math.fabs(value - 21.1111111111111111) < 1e-13
    msg = "32 F should be 21.1111111111111 C, got %f C" % (value)

    assert success, msg


def test_c_to_f():
    value = c_to_f(100)
    success = math.fabs(value - 212) < 1e-13
    msg = "100 C should be 212 F, got %f F" % (value)

    assert success, msg

    
def test_c_to_f2():
    value = c_to_f(-40)
    success = math.fabs(value + 40) < 1e-13
    msg = "100 C should be 212 F, got %f F" % (value)

    assert success, msg


def test_f_to_c_to_f():
    a = 666
    value = f_to_c(c_to_f(a))
    success = math.fabs(value - a) < 1e-13

    msg = "%f F converted to C and back gave %f F" % (a, value)
    assert success, msg