def testReduceLetterMult(self):
x = prefixReduce("a * b")
self.assertEqual(x, ("*", "a", "b"))
x = prefixReduce("a * 1")
self.assertEqual(x, ("*", "a", 1))
x = prefixReduce("1 * a")
self.assertEqual(x, ("*", 1, "a"))
def testReduceLetterDivide(self):
x = prefixReduce("a / b")
self.assertEqual(x, ("/", "a", "b"))
x = prefixReduce("a / 1")
self.assertEqual(x, ("/", "a", 1))
x = prefixReduce("1 / a")
self.assertEqual(x, ("/", 1, "a"))
def testReduceLetterAdd(self):
x = prefixReduce("a + b")
self.assertEqual(x, ("+", "a", "b"))
x = prefixReduce("a + 1")
self.assertEqual(x, ("+", "a", 1))
x = prefixReduce("1 + a")
self.assertEqual(x, ("+", 1, "a"))
def testReduceLetterSubtract(self):
x = prefixReduce("a - b")
self.assertEqual(x, ("-", "a", "b"))
x = prefixReduce("a - 1")
self.assertEqual(x, ("-", "a", 1))
x = prefixReduce("1 - a")
self.assertEqual(x, ("-", 1, "a"))
def testReduceNumber(self):
x = prefixReduce("1")
self.assertEqual(x, 1)
x = prefixReduce("10")
self.assertEqual(x, 10)
x = prefixReduce("999")
self.assertEqual(x, 999)
def testReduceMixed(self):
x = prefixReduce("a + ( 1 + 2 )")
self.assertEqual(x, ("+", "a", 3))
x = prefixReduce("( 1 + 2 ) + a")
self.assertEqual(x, ("+", 3, "a"))
x = prefixReduce("a + ( 2 * 3 )")
self.assertEqual(x, ("+", "a", 6))
x = prefixReduce("( 2 * 3 ) + a")
self.assertEqual(x, ("+", 6, "a"))
def testReduceParen(self):
x = prefixReduce("(3 * 2)")
self.assertEqual(x, 6)
x = prefixReduce("(3 + 2)")
self.assertEqual(x, 5)
x = prefixReduce("5 * (3 + 2)")
self.assertEqual(x, 25)
x = prefixReduce("(3 + 2) * 5")
self.assertEqual(x, 25)
def testReduceLetter(self):
x = prefixReduce("a")
self.assertEqual(x, "a")
x = prefixReduce("z")
self.assertEqual(x, "z")
def testReduceMult(self):
x = prefixReduce("3 * 2")
self.assertEqual(x, 6)
x = prefixReduce("3 * 2 * 4")
self.assertEqual(x, 24)
def testReduceAdd(self):
x = prefixReduce("1 + 2")
self.assertEqual(x, 3)
x = prefixReduce("1 + 2 + 3")
self.assertEqual(x, 6)