def test_negatives(self):
"""
Test exponent corner cases
"""
self.assertEqual(0.0, Calc().eval('-1+1'))
self.assertEqual(1.0, Calc().eval('2+-1'))
self.assertEqual(4, Calc().eval('2^2'))
def test_subtraction(self):
"""
Evaluate subtraction corner cases
"""
self.assertEqual(0, Calc().eval('1-1'))
self.assertEqual(-2, Calc().eval('-1-1'))
self.assertEqual(0, Calc().eval('-1--1'))
def test_parentheses(self):
"""
Test parentheses corner cases
"""
self.assertEqual(4.0, Calc().eval('(4)'))
self.assertEqual(5.0, Calc().eval('(4.0)+1'))
self.assertEqual(3.0, Calc().eval('(4+1)-2'))
def test_exponents(self):
"""
Test exponent corner cases
"""
self.assertEqual(1, Calc().eval('2^0'))
self.assertEqual(2, Calc().eval('2^1'))
self.assertEqual(4, Calc().eval('2^2'))
def test_division(self):
"""
Test division corner cases
Note: division by zero is handled in test_exceptions
"""
self.assertEqual(1, Calc().eval('1/1'))
self.assertEqual(.25, Calc().eval('1/4'))
def test_addition(self):
"""
Evaluate addition corner cases
"""
self.assertEqual(2, Calc().eval('1+1'))
self.assertEqual(2, Calc().eval('1.0+1.0'))
self.assertEqual(0, Calc().eval('-1+1'))
self.assertEqual(-2, Calc().eval('-1+-1'))
def test_value_e(self):
"""
Test mathematical constants value e corner cases
"""
self.assertEqual(4.718281828459045, Calc().eval('(e+2)'))
self.assertEqual(4.718281828459045, Calc().eval('(e)+2'))
self.assertEqual(2.718281828459045, Calc().eval('e'))
self.assertEqual(4.718281828459045, Calc().eval('e+2'))
self.assertEqual(0.7182818284590451, Calc().eval('e-2'))
def test_parentheses(self):
"""
Test parentheses corner cases
"""
self.assertEqual(5.0, Calc().eval('(4.0)+1'))
self.assertEqual(3.0, Calc().eval('(4+1)-2'))
self.assertEqual(5.0, Calc().eval('(5+-5)+5'))
self.assertEqual(-5.0, Calc().eval('(-10+3)+2'))
self.assertEqual(-26.0, Calc().eval('10-(3*2)^2'))
def test_multiplication(self):
"""
Evaluate multiplication corner cases
"""
self.assertEqual(0, Calc().eval('1*0'))
#self.assertEqual(0, Calc().eval('0*-1'))
self.assertEqual(1, Calc().eval('1*1'))
# self.assertEqual(-1, Calc().eval('-1*1'))
# self.assertEqual(1, Calc().eval('-1*-1'))
self.assertEqual(1, Calc().eval('.25*4'))
def test_pi(self):
"""
Test pi corner cases
"""
self.assertEqual(4.1415926535, Calc().eval('(pi)+1'))
self.assertEqual(1.1415926535, Calc().eval('(pi)-2'))
self.assertEqual(3.1415926535, Calc().eval('(pi+-5)+5'))
self.assertEqual(1.8584073465, Calc().eval('(-pi+3)+2'))
self.assertEqual(-29.478417602100684, Calc().eval('10-(pi*2)^2'))
self.assertEqual(1.57079632675, Calc().eval('pi/2'))
def test_phi(self):
"""
Test phi corner cases
"""
self.assertEqual(2.6180339886999997, Calc().eval('(phi)+1'))
self.assertEqual(-0.3819660113000001, Calc().eval('(phi)-2'))
self.assertEqual(1.6180339886999997, Calc().eval('(phi+-5)+5'))
self.assertEqual(3.3819660113000003, Calc().eval('(-phi+3)+2'))
self.assertEqual(-0.47213595435372646, Calc().eval('10-(phi*2)^2'))
self.assertEqual(0.80901699435, Calc().eval('phi/2'))
def test_e(self):
"""
Test e corner cases
"""
self.assertEqual(3.7182818284, Calc().eval('(e)+1'))
self.assertEqual(0.7182818283999999, Calc().eval('(e)-2'))
self.assertEqual(2.7182818284, Calc().eval('(e+-5)+5'))
self.assertEqual(2.2817181716, Calc().eval('(-e+3)+2'))
self.assertEqual(-19.556224394438587, Calc().eval('10-(e*2)^2'))
self.assertEqual(1.3591409142, Calc().eval('e/2'))
def test_symbols(self):
"""
Test evaluation of mathematical symbols
"""
self.assertEqual(2.618033988749895, Calc().eval('phi+1'))