def test_IsValid_NestedParenConfiguration_Returns_True(self):
# Arrange
entireExpression = RawExpression("((1+1)+1)")
# Act
actual = entireExpression.isValid()
expected = True
# Assert
self.assertEqual(actual, expected)
def test_IsValid_Plus1Plus1_Returns_False(self):
# Arrange
entireExpression = RawExpression("+1+1")
# Act
actual = entireExpression.isValid()
expected = False
# Assert
self.assertEqual(actual, expected)
def test_IsValid_LParen1Plus1RParen_Returns_True(self):
# Arrange
entireExpression = RawExpression("(1+1)")
# Act
actual = entireExpression.isValid()
expected = True
# Assert
self.assertEqual(actual, expected)
def test_IsValid_EmptyParens_Returns_False(self):
# Arrange
entireExpression = RawExpression("1+()1")
# Act
actual = entireExpression.isValid()
expected = False
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_1Plus1Plus1Plus1_Returns_4(self):
# Arrange
entireExpression = RawExpression("1+1+1+1")
# Act
actual = entireExpression.evaluate()
expected = 4
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_2Plus2Times3_Returns_8(self):
# Arrange
entireExpression = RawExpression("2+2*3")
# Act
actual = entireExpression.evaluate()
expected = 8
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_4Divides2_Returns_2(self):
# Arrange
entireExpression = RawExpression("4/2")
# Act
actual = entireExpression.evaluate()
expected = 2
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_LParen2Plus3RParen2_Returns_10(self):
# Arrange
entireExpression = RawExpression("(2+3)2")
# Act
actual = entireExpression.evaluate()
expected = 10
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_MiscellaneousComplexExpressionWithSpaces_Returns_24(self):
# Arrange
entireExpression = RawExpression("3* ( (2+3)-4)*(2+1)(1+1)+5+2/ 2")
# Act
actual = entireExpression.evaluate()
expected = 24
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_2Times1_Returns_2(self):
# Arrange
entireExpression = RawExpression("2*1")
# Act
actual = entireExpression.evaluate()
expected = 2
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_1PlusParentheticalParenthetical_Returns_11(self):
# Arrange
entireExpression = RawExpression("1+(1+1)(2+3)")
# Act
actual = entireExpression.evaluate()
expected = 11
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_ParentheticalPlusParentheticalPlus1_Returns_8(self):
# Arrange
entireExpression = RawExpression("(1+1)+(2+3)+1")
# Act
actual = entireExpression.evaluate()
expected = 8
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_TwoParentheticalsNoTimes_Returns_10(self):
# Arrange
entireExpression = RawExpression("(2+3)(1+1)")
# Act
actual = entireExpression.evaluate()
expected = 10
# Assert
self.assertEqual(actual, expected)
def test_IsValid_RParenStart_Returns_False(self):
# Arrange
entireExpression = RawExpression(")1+1)")
# Act
actual = entireExpression.isValid()
expected = False
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_1Minus1_Returns_0(self):
# Arrange
entireExpression = RawExpression("1-1")
# Act
actual = entireExpression.evaluate()
expected = 0
# Assert
self.assertEqual(actual, expected)
def test_Evaluate_1Times2Times2Minus3_Returns_1(self):
# Arrange
entireExpression = RawExpression("1*2*2-3")
# Act
actual = entireExpression.evaluate()
expected = 1
# Assert
self.assertEqual(actual, expected)
from RawExpression import RawExpression
#!/usr/bin/env python
haveValidEquation = False
while (not haveValidEquation):
print("Please enter an equation.")
print("x = ")
inputString = input()
expression = RawExpression(inputString)
if expression.isValid():
haveValidEquation = True
else:
print("Invalid Equation.")
print("x = " + str(expression.evaluate()))
