是否可以为单元测试提供一个在运行时提供的参数？
例如，我已将5个COM端口连接到我的机器。测试环境应选择正确的COM端口并对其进行测试。因此，所测试的不是实际的python代码，python单元测试工具基本上用于验证由python脚本建立的通信。取决于初始通信，应选择具有相应参数的多个测试（例如使用的端口）并将其添加到批次（测试套件）中。
下一步，我要遍历包含COM端口和其他选项的数组。
有一个装饰器@parametrized。该解决方案看起来不错，并且可以按需调用测试。但是不可能在运行时使用它。加载脚本时启动装饰器。我知道的唯一解决方法是使用全局变量将COM端口传递给TestCase。然后必须由测试运行程序调用测试。
总结：
是否有可能在运行时对测试进行参数设置？
然后，也可以将其添加到测试套件中，以列出仅参数不同的相同测试的列表。
或其他替代方法是在setUpClass()中分配参数，并且无论如何都要再次运行多个测试，但要使用其他参数。也许有可能吗？
那么，如何在运行时使用单元测试在python中使用参数设置测试？
答案 0 :(得分：0)
找出COM端口是否正确的唯一方法是与之通信。我们在说哪种COM端口？例如，一台3D打印机将发送定期命令，表明已准备就绪，可以使用它来检测是否连接了3D打印机。在python中，您可以轻松获得可用COM端口的列表，并尝试连接到其中一个。我曾经写过一个可以连接到任何自动生成的可用COM端口列表的接口。也许您可以使用其中的一部分来完成您的项目：
import math
import serial
import wx
import threading
class MainFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title = "Hydroponics controller")
self.comport = ""
self.baudrate = 0
self.ser = serial.Serial()
self.p = wx.Panel(self)
nb = Notebook(self)
tab1 = connectionTab(nb)
tab2 = ControllerTab(nb)
nb.AddPage(tab1, "Connection")
nb.AddPage(tab2, "Controller")
sizer = wx.BoxSizer()
sizer.Add(nb, 1, wx.EXPAND)
self.p.SetSizer(sizer)
class Notebook(wx.Notebook):
def __init__(self, parent):
wx.Notebook.__init__(self, parent.p)
self.ser = parent.ser
class connectionTab(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent)
self.p = parent
comLabel = wx.StaticText(self, -1, "Serial port", pos = wx.Point(10, 10), size = wx.Size(64, 20))
self.comList = wx.ListBox(self, size = wx.Size(64, 128), choices = [], pos = wx.Point(10, 40), style = wx.LB_SINGLE)
baudrateLabel = wx.StaticText(self, -1, "Baudrate", pos = wx.Point(84, 10), size = wx.Size(64, 20))
self.baudrateList = wx.ListBox(self, size = wx.Size(64, 128), choices = ["9600", "115200", "250000"], pos = wx.Point(84, 40), style = wx.LB_SINGLE)
self.baudrateList.SetSelection(1)
self.refreshButton = wx.Button(self, -1, "Refresh", pos = wx.Point(158, 40))
self.refreshButton.Bind(wx.EVT_BUTTON, self.refreshButton_clicked)
self.connectButton = wx.Button(self, -1, "Connect", pos = wx.Point(158, 70))
self.connectButton.Bind(wx.EVT_BUTTON, self.connectButton_clicked)
self.statusLabel = wx.StaticText(self, -1, "", pos = wx.Point(158, 100))
self.refreshDevices()
def refreshButton_clicked(self, event):
self.refreshDevices()
def connectButton_clicked(self, event):
try:
self.p.ser = serial.Serial(self.comList.GetStringSelection(), self.baudrateList.GetStringSelection())
self.statusLabel.SetLabel("Connection succesful.")
except serial.serialutil.SerialException:
self.statusLabel.SetLabel("Connection failed.")
def refreshDevices(self):
self.availableDevices = []
self.comList.Clear()
for i in range(0,256):
try:
tmp = serial.Serial("COM{}".format(i))
self.comList.Append("COM{}".format(i))
except serial.serialutil.SerialException:
continue
if(self.comList.GetCount()):
self.comList.SetSelection(0)
class ControllerTab(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent)
self.parent = parent
self.threadStopped = True
self.t = threading.Thread(target = self.runSequence)
self.t.start()
ROWS = 3
ROWS_POS = [40, 370, 700]
COLUMNS = 10
COLUMNS_POS = [0, 88, 176, 264, 352, 440, 528, 616, 704, 792]
self.commandList = []
self.buttonList = []
for i in range(0, COLUMNS):
for j in range(0, ROWS):
self.buttonList.append(PlantButton(self, COLUMNS_POS[i], ROWS_POS[j], wx.Point(i * 110 + 10, j * 30 + 10)))
self.homeAllButton = wx.Button(self, -1, "Home all", pos = wx.Point(10, ROWS * 30 + 10))
self.homeAllButton.Bind(wx.EVT_BUTTON, self.homeAllButton_clicked)
self.dwellButton = wx.Button(self, -1, "Dwell 1s", pos = wx.Point(10, (ROWS + 1) * 30 + 10))
self.dwellButton.Bind(wx.EVT_BUTTON, self.dwellButton_clicked)
self.commandListBox = wx.ListBox(self, size = wx.Size(192, 512), choices = [], pos = wx.Point(10, (ROWS + 2) * 30 + 10))
self.startSequenceButton = wx.Button(self, -1, "Start sequence", pos = wx.Point(212, (ROWS + 2) * 30 + 10))
self.startSequenceButton.Bind(wx.EVT_BUTTON, self.startSequenceButton_clicked)
self.saveFileButton = wx.Button(self, -1, "Save to file", pos = wx.Point(212, (ROWS + 3) * 30 + 10))
self.saveFileButton.Bind(wx.EVT_BUTTON, self.saveFileButton_clicked)
self.deleteCommandButton = wx.Button(self, -1, "Delete selected command", pos = wx.Point(212, (ROWS + 4) * 30 + 10))
self.deleteCommandButton.Bind(wx.EVT_BUTTON, self.deleteCommandButton_clicked)
def homeAllButton_clicked(self, event):
self.commandList.append("G92 X200\nG1 X0 F6000\nG28 XYZ\n")
self.commandListBox.Append("Home all")
def dwellButton_clicked(self, event):
self.commandList.append("G4 P1000\n")
self.commandListBox.Append("Dwell for 1 second")
def startSequenceButton_clicked(self, event):
self.threadStopped = False
def saveFileButton_clicked(self, event):
file = open("sequence.gcode", "w")
for i in range(0, len(self.commandList)):
file.write(self.commandList[i])
file.close()
def deleteCommandButton_clicked(self, event):
index = self.commandListBox.GetSelection()
if(index == wx.NOT_FOUND):
return
self.commandList.pop(index)
self.commandListBox.Delete(index)
if(index == 0):
self.commandListBox.SetSelection(0)
else:
self.commandListBox.SetSelection(index - 1)
def runSequence(self):
while True:
if(self.threadStopped == False):
sequenceLength = len(self.commandList)
index = 0
self.parent.ser.write("G92 X100\nG1 X0 F6000\nM340 P3 S2000\nG28 XYZ\n")
while((index < sequenceLength) & (self.threadStopped == False)):
data = self.parent.ser.readline()
if(len(data) != 0):
print "READ: {}".format(data),
if(data == "ok 0\r\n"):
print "SENT: {}".format(self.commandList[index]),
self.parent.ser.write(self.commandList[index])
index += 1
print "Stopped"
self.threadStopped = True
class PlantButton:
def __init__(self, parent, x, y, buttonPos):
self.parent = parent
self.x = x
self.y = y
self.buttonPos = buttonPos
self.button = wx.Button(self.parent, -1, "({}, {})".format(self.x, self.y), pos = self.buttonPos)
self.button.Bind(wx.EVT_BUTTON, self.button_clicked)
def button_clicked(self, event):
self.parent.commandList.append("G1 X{} Y{} F6000\n".format(self.y, self.x))
self.parent.commandList.append("G1 Z70 F6000\nG4 P1000\nM340 P3 S2500\nG4 P500\nM340 P3 S2468\nG4 P1000\nG91\nG1 X-40 F6000\nG90\nG1 Z0 F6000\n")
self.parent.commandList.append("G1 X700 F6000\nG4 P1000\nM340 P3 S2000\n")
self.parent.commandListBox.Append("Go to position ({}, {})\n".format(self.x, self.y))
if __name__ == "__main__":
app = wx.App()
MainFrame().Show()
app.MainLoop()