def testLongExpression(self):
data1 = [
"-", ["+", ["x", [], []], ["y", [], []]],
["/", ["*", ["z", [], []], ["a", [], []]], ["b", [], []]]
] #x=30, y=20, z=100, a=10, b=5; x+y-z*a/b
data2 = [["x", 30], ["y", 20], ["z", 100], ["a", 10], ["b", 5]]
result = evalTree(data1, data2)
self.assertEqual(-150, result)
def testDivisionByZero(self):
data1 = ["/", ["x", [], []], ["0", [], []]] #x=1; x/0
data2 = [["x", 1]]
result = evalTree(data1, data2)
self.assertEqual(None, result)
def testBasicExpression(self):
data1 = ["+", ["x", [], []], ["y", [], []]] #x=1, y=2; x+y
data2 = [["x", 1], ["y", 2]]
result = evalTree(data1, data2)
self.assertEqual(3, result)
def testAddition(self):
result = evalTree(["+", ["a", [], []], ["b", [], []]],
[["a", 10], ["b", 20]])
self.assertEqual(result, 30)
def testEnvironment(self):
data1 = ["y", [], []] #y=30, y
data2 = [["a", 10], ["y", 30]]
result = evalTree(data1, data2)
self.assertEqual(30, result)
def test_3(self):
test3Tree=["+",["a",[],[]],["*",["b",[],[]],["c",[],[]]]]
test3Environment=[["a",10],["b",20],["c",30]]
self.assertEqual(evalTree(test3Tree,test3Environment),610)
def testOne(self):
result = evalTree(["1", [], []], [])
self.assertEqual(result, 1)
def testChildMulti(self):
result = evalTree([
"+", ["a", [], []],
["*", ["+", ["a", [], []], ["a", [], []]], ["c", [], []]]
], [["a", 10], ["b", 20], ["c", 30]])
self.assertEqual(result, 610)
def testEmpty(self):
result = evalTree([[], [], []], [])
self.assertEqual(result, None)
def testMultiplication(self):
result = evalTree(["*", ["a", [], []], ["b", [], []]],
[["a", 10], ["b", 20]])
self.assertEqual(result, 200)
def testDivision(self):
result = evalTree(["/", ["a", [], []], ["b", [], []]],
[["a", 10], ["b", 20]])
self.assertEqual(result, 0.5)
def testSubtraction(self):
result = evalTree(["-", ["b", [], []], ["a", [], []]],
[["a", 10], ["b", 20]])
self.assertEqual(result, 10)
def test_1(self):
test1Tree=["10",[],[]]
test1Environment=[["a",10],["b",20],["c",30]]
self.assertEqual(evalTree(test1Tree,test1Environment),'10')
def test_4(self):
test4Tree=["*",["b",[],[]],["c",[],[]]]
test4Environment=[["a",10],["b",20],["c",30]]
self.assertEqual(evalTree(test4Tree,test4Environment),600)
def testMissingVariable(self):
data1 = ["+", ["x", [], []], ["y", [], []]] #x=1; x/y
data2 = [["x", 1]]
result = evalTree(data1, data2)
self.assertEqual(None, result)
def testZeroDivision(self):
result = evalTree(["/", ["a", [], []], ["0", [], []]], [["a", 10]])
self.assertEqual(result, None)
def testRoot(self):
data1 = ["30", [], []] #x=125,y=250,z=300; 30
data2 = [["x", 125], ["y", 250], ["z", 300]]
result = evalTree(data1, data2)
self.assertEqual(30, result)
def test_2(self):
test2Tree=["x1",[],[]]
test2Environment=[["a",10],["x1",30]]
self.assertEqual(evalTree(test2Tree,test2Environment),30)