Question

当测试失败时，会有一个输出指示测试的上下文，例如

=================================== FAILURES ===================================
______________________________ Test.test_sum_even ______________________________

numbers = [2, 4, 6]

    @staticmethod
    def test_sum_even(numbers):
        assert sum(numbers) % 2 == 0
>       assert False
E       assert False

test_preprocessing.py:52: AssertionError

如果我也希望通过测试同样的事情怎么办？这样我可以快速检查传递给测试的参数是否正确？

我尝试过命令行选项行--full-trace，-l，--tb long和-rpP，但都没有。

有什么想法吗？

Answer 1

使用''' encrypt pdf files ''' import PyPDF2 as p import os from tkinter import * from tkinter import ttk from tkinter.filedialog import askopenfilename, askdirectory from tkinter.messagebox import showerror class MainWindow(Frame): def __init__(self): Frame.__init__(self) self.choice = 'Choose a file or a folder' self.processing = 'Encrypting file(s)' self.master.title('Viktor PDF titkositoja :)') self.master.rowconfigure(5, weight=1) self.master.columnconfigure(5, weight=1) self.grid(sticky=W+E+N+S) self.button = Button(self, text='File', command=self.enc_file, width=30) self.button.grid(row=1, column=0, sticky=W+E, padx=15, pady=6) self.button = Button(self, text='Folder', command=self.enc_folder, width=30) self.button.grid(row=1, column=1, sticky=W+E, padx=15, pady=6) self.labelText = StringVar() self.label = Label(self, textvariable=self.labelText) self.labelText.set(self.choice) self.label.grid(row=2, column=0, columnspan=2, sticky=W+E, padx=3, pady=10) self.row = 2 self.copy_to = os.path.join('/home', 'zaturek', 'Documents') def reset_labels(self): list = self.grid_slaves() for l in list[:-3]: l.destroy() self.labelText.set(self.choice) def enc_file(self): self.reset_labels() fname = askopenfilename(filetypes=(('PDF files', '.pdf'), ('All files', '*.*') )) if fname: try: self.labelText.set(self.processing + '\n' + fname) self.enc(fname) except Exception as e: showerror(title='Error', message=e) def enc_folder(self): self.reset_labels() dname = askdirectory() if dname: # self.labelText.set('Fajlok titkositasa a mappaban: ' + '\n' + dname) for f in os.listdir(): if os.path.isfile(f) and '.pdf' in f: try: self.labelText.set(self.processing + '\n' + f) self.enc(f) except Exception as e: showerror(title='error', message=e) print(f) def enc(self, f): #self.label.config(text='Fajl(ok) titkositasa folyamatban' + '\n' + f) read_pdf = p.PdfFileReader(f) write_pdf = p.PdfFileWriter() if read_pdf.isEncrypted == False: try: for i in range(0, read_pdf.getNumPages()): write_pdf.addPage(read_pdf.getPage(i)) write_pdf.encrypt('1234') with open(self.new_fname(f), 'wb') as out: write_pdf.write(out) #print('itt') self.nlabel2 = Label(self, text=f + ' - kesz.') self.nlabel2.grid(row=self.row+1, column=0, columnspan=2, sticky=W+E) self.row += 1 except Exception as e: m = 'Valami nem stimmelt. Ellenorizd es probald ujra. Ha akkor sem megy, hivj fel!' showerror(title='error', message=f + '\n' + e) print(e) else: self.nlabel3 = Label(self, text=f + ' - mar kodolva volt.') self.nlabel3.grid(row=self.row+1, column=0, columnspan=2, sticky=W+E) self.row += 1 def new_fname(self, f): t = os.path.split(f)[1].split('.') #print(t[0]) t[0] = t[0] + '_e' nf = str.join('.', (t[0], t[1])) #print(os.path.join(self.copy_to, nf)) return os.path.join(self.copy_to, nf) if __name__ == '__main__': MainWindow().mainloop()标志执行pytest将导致它在执行时列出每个测试的完全限定名称，例如：

--verbose

Answer 2

如果您只是要求传递测试用例的标准输出，那么您需要将-s选项传递给pytest以防止捕获标准输出。有关标准输出抑制的更多信息，请参见pytest docs。

Answer 3

pytest没有此功能。它的工作是向您显示断言失败时来自异常的错误。

一种解决方法是使用python的logging模块，然后使用pytest中的caplog装置，明确包含要通过测试的信息。

例如func.py的一个版本可能是：

import logging

logging.basicConfig(level=logging.DEBUG)
log = logging.getLogger('my-even-logger')


def is_even(numbers):
    res = sum(numbers) % 2 == 0
    if res is True:
        log.warning('Sum is Even')
    else:
        log.warning('Sum is Odd')

#... do stuff ...

，然后是test_func.py：

import pytest
from func import is_even

@pytest.fixture
def my_list():
    numbers = [2, 4, 6]
    return numbers
 
def test_is_even(caplog, my_list):
    with caplog.at_level(logging.DEBUG, logger='my-even-logger'):
        is_even(my_list)
    assert 'Even' in caplog.text

如果您运行pytest -s test_even.py并且由于测试通过，则记录器将向您显示以下消息：

test_even.py WARNING:my-sum-logger:Sum is Even

显示pytest中通过测试的详尽信息

3 个答案: