def teste_deve_avaliar_uma_subtracao(self):
expr = Expressao("3-2")
self.assertEquals(expr.resolve_expressao(), 1)
def teste_deve_tokenizar_expressao_complexa(self):
expr = Expressao("2 + 5 *(7 * 10 + 5.7 -10)")
self.assertEquals(
expr.tokens,
[2, "+", 5, "*", "(", 7, "*", 10, "+", 5.7, "-", 10, ")"])
def teste_deve_avaliar_uma_soma(self):
expr = Expressao("1+1")
self.assertEquals(expr.resolve_expressao(), 2)
expr = Expressao("20+22")
self.assertEquals(expr.resolve_expressao(), 42)
def teste_deve_avaliar_uma_subtracao(self):
expr = Expressao("3-2")
self.assertEquals(expr.resolve_expressao(), 1)
def teste_deve_tokenizar_operadores_seguidos(self):
expr = Expressao("1 + (1)")
self.assertEquals(expr.tokens, [1, "+", "(", 1, ")"])
def teste_deve_separar_operadores_e_operandos(self):
expr = Expressao("2 + 3")
self.assertEquals(expr.operadores, ["+"])
self.assertEquals(expr.operandos, [2, 3])
def teste_deve_priorizar_operadores(self):
expr = Expressao("3 * 5 + 9")
self.assertEquals(expr.resolve_expressao(), 24)
def teste_deve_tokenizar_numeros_de_um_digito(self):
expr = Expressao("4")
# primeiro token da lista de tokens tem que ser o numero 4
self.assertEquals(expr.tokens[0], 4)
def teste_deve_ler_numero_decimal(self):
expr = Expressao("1.5")
# primeiro token da lista de tokens tem que ser o decimal 1.5
self.assertEquals(expr.tokens[0], 1.5)
def teste_deve_priorizar_operadores(self):
expr = Expressao("3 * 5 + 9")
self.assertEquals(expr.resolve_expressao(), 24)
def teste_deve_possuir_lista_de_tokens(self):
expr = Expressao("")
self.assertTrue(hasattr(expr, "tokens"))
self.assertTrue(isinstance(expr.tokens, list))
def teste_deve_somar_varios_operandos(self):
expr = Expressao("1 + 2 + 3 + 4")
self.assertEquals(expr.resolve_expressao(), 10)
def teste_deve_avaliar_uma_divisao(self):
expr = Expressao("84/2")
self.assertEquals(expr.resolve_expressao(), 42)
def teste_deve_avaliar_uma_multiplicacao(self):
expr = Expressao("21*2")
self.assertEquals(expr.resolve_expressao(), 42)
def teste_deve_avaliar_uma_multiplicacao(self):
expr = Expressao("21*2")
self.assertEquals(expr.resolve_expressao(), 42)
def teste_deve_ignorar_espaco(self):
expr = Expressao(" ")
self.assertEquals(expr.tokens, [])
def teste_deve_avaliar_uma_divisao(self):
expr = Expressao("84/2")
self.assertEquals(expr.resolve_expressao(), 42)
def teste_deve_tokenizar_soma(self):
expr = Expressao(" 1 + 1 ")
self.assertEquals(len(expr.tokens), 3)
self.assertTrue("+" in expr.tokens)
def teste_deve_somar_varios_operandos(self):
expr = Expressao("1 + 2 + 3 + 4")
self.assertEquals(expr.resolve_expressao(), 10)
def teste_deve_tokenizar_subtracao(self):
expr = Expressao("1-1")
self.assertEquals(len(expr.tokens), 3)
self.assertTrue("-" in expr.tokens)
def teste_deve_instanciar_uma_expressao(self):
self.assertTrue(isinstance(Expressao(""), Expressao))
def teste_deve_avaliar_uma_soma(self):
expr = Expressao("1+1")
self.assertEquals(expr.resolve_expressao(), 2)
expr = Expressao("20+22")
self.assertEquals(expr.resolve_expressao(), 42)