Question

这是我想要测试的虚拟课程：

formatter: function() {
    var points = this.points,
      each = Highcharts.each,
      txt = '<span style="font-size: 10px">' + points[0].key + '</span><br/>',
      H = Highcharts,
      value,
      numericSymbolDetector;

    each(points, function(point, i) {
      value = point.y;
      numericSymbolDetector = Math.abs(point.y);
      if (numericSymbolDetector > 1000) {
         value = H.numberFormat(value / 1000, 2, '.','' ) + 'k';
      } 
      txt += '<span style="color:' + point.series.color + '">' + point.series.name + ': <b>' + value + '</b><br/>';
    });

    return txt;
  }

这是我的单位测试：

class Meter:

    def __init__(self, meterInfo):
        self.b1pos = meterInfo['b1pos']


    def setMeter(self):
        print 'Initializing'
        try:
             print 'Connecting'
        except IOError as message:
            print message

    def readSignal(self, ele_name):
        try:
            if ele_name in ("b1", "b2"):
                readValue = 0.0
                readValue1 = 0.0
                return readValue, readValue1
            else:
                readValue = 0.0
                readValue1 = 0.0
                return readValue, readValue1
        except IOError as message:
            print message

对于testSetMeter（）我没有任何问题，但对于testReadSignal（）它给了我：＆＃34; TypeError：＆＃39; tuple＆＃39;对象不可调用＆＃34; 我知道这个错误与radSignal的返回有关，但我该如何解决呢？我尝试过：

class TestMeter(unittest.TestCase):

    def testSetMeter(self):
        m = meter.Meter({'b1pos': 'b1pos'})
        self.assertRaises(IOError, m.setMeter())

    def testReadSignal(self):
        m = meter.Meter({'b1pos': 'b1pos'})
        a, b = m.readSignal('b1')
        self.assertTrue(isinstance(a, numbers.Number))
        self.assertTrue(isinstance(b, numbers.Number))
        self.assertRaises(IOError, m.readSignal('b1'))

    if __name__ == '__main__':
        unittest.main()

但这是输出：

 def testReadSignal(self):
    m = meter.Meter({'b1pos': 'b1pos'})
    a, b = m.readSignal('b1')
    self.assertTrue(isinstance(a, numbers.Number))
    self.assertTrue(isinstance(b, numbers.Number))
    with self.assertRaises(IOError):
         m.readSignal('b1')

Answer 1

必须使用pytest.raises。请参阅docs。

with self.raises(IOError):
    m.readSignal('b1')

似乎测试会失败，因为方法正在捕获异常，而不是提升它们。

Answer 2

带

 self.assertRaises(Exception, m.readSignal('b1'))

我解决了问题

测试异常出错

2 个答案: