def test_fraction_truediv(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 / frac_1_3 == specs.Fraction(3, 2)
assert frac_1_3 / frac_n2_3 == specs.Fraction(-1, 2)
with pytest.raises(ZeroDivisionError) as excinfo:
frac_1_3 / specs.Fraction(0, 3)
assert excinfo.value.args[0] == "cannot divide by zero"
def test_fraction_eq(set_up_fractions):
"""tests comparing fractions"""
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 == specs.Fraction(1, 2)
assert frac_1_3 == specs.Fraction(2, 6)
assert frac_n2_3 == specs.Fraction(8, -12)
assert frac_1_3 == float(1 / 3) #compare equivalence to floats as well
def test_fraction_add(set_up_fractions):
"""tests adding fractions"""
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
#compare to fraction that should be equal
assert frac_1_2 + frac_1_3 == specs.Fraction(5, 6)
assert frac_1_3 + frac_n2_3 == specs.Fraction(-1, 3)
assert frac_n2_3 + frac_1_3 + frac_1_3 == specs.Fraction(0, 1)
def test_fraction_truediv(set_up_fractions):
"""tests dividing fractions"""
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
#compare to fraction that should be equal
assert frac_1_2 / frac_1_3 == specs.Fraction(3, 2)
assert frac_1_3 / frac_n2_3 == specs.Fraction(-1, 2)
assert specs.Fraction(0, 1) / frac_n2_3 == specs.Fraction(0, 1)
pytest.raises(ZeroDivisionError, specs.Fraction.__truediv__, frac_1_2,
specs.Fraction(0, 1))
def test_fraction_truediv(set_up_fractions):
#test cases for all conditions
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 / frac_1_3 == specs.Fraction(3, 2)
assert frac_1_3 / frac_1_3 == specs.Fraction(1, 1)
with pytest.raises(ZeroDivisionError) as excinfo:
specs.Fraction(0, 0) == 0
assert excinfo.value.args[0] == "denominator cannot be zero"
with pytest.raises(ZeroDivisionError) as excinfo:
frac_n2_3 / specs.Fraction(0, -12) == specs.Fraction(8, -12)
assert excinfo.value.args[0] == "cannot divide by zero"
def set_up_fractions():
"""
the add is weird
self(1,5) is 1/5, and other is 2/3
to add them take 3/3*(1/5) and 5/5*(2/3)
numerator will become (3*1 + 5*2), denominator is 3*5.
"""
frac_1_3 = specs.Fraction(1, 3)
frac_1_2 = specs.Fraction(1, 2)
frac_n2_3 = specs.Fraction(-2, 3)
return frac_1_3, frac_1_2, frac_n2_3
def test_fraction_init(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_3.numer == 1
assert frac_1_2.denom == 2
assert frac_n2_3.numer == -2
with pytest.raises(ZeroDivisionError) as excinfo:
specs.Fraction(1, 0)
with pytest.raises(TypeError) as excinfo:
specs.Fraction(1.5, 3)
with pytest.raises(TypeError) as excinfo:
specs.Fraction(1, 1.3)
frac = specs.Fraction(30, 42)
assert frac.numer == 5
assert frac.denom == 7
def test_fraction_init(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_3.numer == 1
assert frac_1_2.denom == 2
assert frac_n2_3.numer == -2
frac = specs.Fraction(30, 42)
assert frac.numer == 5
assert frac.denom == 7
with pytest.raises(ZeroDivisionError) as excinfo_1:
specs.Fraction(1, 0)
assert excinfo_1.value.args[0] == "denominator cannot be zero"
with pytest.raises(TypeError) as excinfo_1:
specs.Fraction('3', '5')
assert excinfo_1.value.args[0] == "numerator and denominator must be integers"
def test_fraction_init(set_up_fractions):
#test cases for all conditions
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_3.numer == 1
assert frac_1_2.denom == 2
assert frac_n2_3.numer == -2
assert frac_n2_3.denom == 3
frac = specs.Fraction(30, 42)
assert frac.numer == 5
assert frac.denom == 7
with pytest.raises(TypeError) as excinfo:
specs.Fraction(1.3, 3)
assert excinfo.value.args[
0] == "numerator and denominator must be integers"
def test_fraction_init(set_up_fractions):
"""tests proper initialization of fractions objects"""
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_3.numer == 1
assert frac_1_2.denom == 2
assert frac_n2_3.numer == -2
frac = specs.Fraction(30, 42) # 30/42 reduces to 5/7.
assert frac.numer == 5
assert frac.denom == 7
with pytest.raises(ZeroDivisionError) as err:
specs.Fraction(1, 0)
assert err.value.args[0] == "denominator cannot be zero"
with pytest.raises(TypeError) as err1:
specs.Fraction(1.2, 1.3)
assert err1.value.args[0] == "numerator and denominator must be integers"
def test_fraction_str(set_up_fractions):
#test cases for all conditions
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert str(frac_1_3) == "1/3"
assert str(frac_1_2) == "1/2"
assert str(frac_n2_3) == "-2/3"
assert str(specs.Fraction(2, 1)) == "2"
def test_fraction_str(set_up_fractions):
"""tests fractions represented as strings"""
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert str(frac_1_3) == "1/3"
assert str(frac_1_2) == "1/2"
assert str(frac_n2_3) == "-2/3"
assert str(specs.Fraction(2, 1)) == '2' #no denominator
def test_fraction_str(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert str(frac_1_3) == "1/3"
assert str(frac_1_2) == "1/2"
assert str(frac_n2_3) == "-2/3"
frac = specs.Fraction(30, 5)
assert str(frac) == '6'
def test_fraction_init(set_up_fractions):
#this function will also test the Errors
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_3.numer == 1
assert frac_1_2.denom == 2
assert frac_n2_3.numer == -2
frac = specs.Fraction(30, 42)
pytest.raises(ZeroDivisionError,
specs.Fraction,
numerator=7,
denominator=0)
assert frac.numer == 5
assert frac.denom == 7
with pytest.raises(TypeError) as excinfo:
specs.Fraction(7, "hello")
assert excinfo.value.args[
0] == "numerator and denominator must be integers"
def test_fraction_str(set_up_fractions):
#this includes the case when denominator is 1
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
frac = specs.Fraction(3, 1)
assert str(frac) == "3"
assert str(frac_1_3) == "1/3"
assert str(frac_1_2) == "1/2"
assert str(frac_n2_3) == "-2/3"
def test_fraction_init(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_3.numer == 1
assert frac_1_2.denom == 2
assert frac_n2_3.numer == -2
frac = specs.Fraction(30, 42)
assert frac.numer == 5
assert frac.denom == 7
def test_fraction_add(set_up_fractions):
#test cases for all conditions
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 + frac_1_2 == specs.Fraction(1, 1)
assert frac_1_3 + frac_1_3 == specs.Fraction(2, 3)
assert frac_n2_3 + frac_1_2 == specs.Fraction(1, -6)
def test_fraction_str(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert str(frac_1_3) == "1/3"
assert str(frac_1_2) == "1/2"
assert str(frac_n2_3) == "-2/3"
assert str(specs.Fraction(3, 1)) == "3"
def test_fraction_add(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 + frac_1_3 == specs.Fraction(5, 6)
assert frac_1_3 + frac_n2_3 == specs.Fraction(-1, 3)
def test_fraction_sub(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 - frac_1_3 == specs.Fraction(1, 6)
assert frac_1_3 - frac_n2_3 == specs.Fraction(1, 1)
def set_up_fractions():
"""creates some test fractions for other test functions"""
frac_1_3 = specs.Fraction(1, 3)
frac_1_2 = specs.Fraction(1, 2)
frac_n2_3 = specs.Fraction(-2, 3)
return frac_1_3, frac_1_2, frac_n2_3 #return several fraction to use
def test_fraction_mul(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 * frac_1_3 == specs.Fraction(1, 6)
assert frac_1_3 * frac_n2_3 == specs.Fraction(-2, 9)
def set_up_fractions():
#initiate some values
frac_1_3 = specs.Fraction(1, 3)
frac_1_2 = specs.Fraction(1, 2)
frac_n2_3 = specs.Fraction(-2, 3)
return frac_1_3, frac_1_2, frac_n2_3
def test_fraction_eq(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 == specs.Fraction(1, 2)
assert specs.Fraction.__eq__(frac_1_2, 0.5)
assert frac_1_3 == specs.Fraction(2, 6)
assert frac_n2_3 == specs.Fraction(8, -12)
def test_fraction_mul(set_up_fractions):
#test cases for all conditions
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 * frac_1_2 == specs.Fraction(1, 4)
assert frac_1_3 * frac_1_2 == specs.Fraction(1, 6)
assert frac_n2_3 * frac_1_2 == specs.Fraction(2, -6)
def test_fraction_sub(set_up_fractions):
#test cases for all conditions
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 - frac_1_3 == specs.Fraction(1, 6)
assert frac_1_3 - frac_1_3 == 0
assert frac_n2_3 - frac_1_3 == -1
def test_fraction_eq(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 == specs.Fraction(1, 2)
assert frac_1_3 == specs.Fraction(2, 6)
assert frac_n2_3 == specs.Fraction(8, -12)
assert specs.Fraction(3, 5) == 0.6
def test_fraction_eq(set_up_fractions):
#test cases for all conditions
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert frac_1_2 == specs.Fraction(1, 2)
assert frac_1_3 == specs.Fraction(2, 6)
assert frac_n2_3 == specs.Fraction(8, -12)
def test_fraction_truD(set_up_fractions):
frac_1_3, frac_1_2, frac_n2_3 = set_up_fractions
assert str(specs.Fraction.__truediv__(frac_1_3, frac_1_2)) == "2/3"
with pytest.raises(ZeroDivisionError) as excinfo:
specs.Fraction.__truediv__(frac_1_3, specs.Fraction(0, 1))
assert excinfo.value.args[0] == "cannot divide by zero"
def set_up_fractions():
frac_1_3 = specs.Fraction(1, 3)
frac_1_2 = specs.Fraction(1, 2)
frac_n2_3 = specs.Fraction(-2, 3)
return frac_1_3, frac_1_2, frac_n2_3
