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I am trying to create my first automated test suite with unittest for the first time.
However, when I try to execute my test suite, unittest throws the following exception:
Traceback (most recent call last):
File "testing_pos_line.py", line 31, in <module>
unittest.main()
File "C:\Users\barnej78\AppData\Local\Continuum\Anaconda3\lib\unittest\main.py", line 93, in __init__
self.parseArgs(argv)
File "C:\Users\barnej78\AppData\Local\Continuum\Anaconda3\lib\unittest\main.py", line 140, in parseArgs
self.createTests()
File "C:\Users\barnej78\AppData\Local\Continuum\Anaconda3\lib\unittest\main.py", line 144, in createTests
self.test = self.testLoader.loadTestsFromModule(self.module)
File "C:\Users\barnej78\AppData\Local\Continuum\Anaconda3\lib\unittest\loader.py", line 123, in loadTestsFromModule
tests.append(self.loadTestsFromTestCase(obj))
File "C:\Users\barnej78\AppData\Local\Continuum\Anaconda3\lib\unittest\loader.py", line 92, in loadTestsFromTestCase
loaded_suite = self.suiteClass(map(testCaseClass, testCaseNames))
File "C:\Users\barnej78\AppData\Local\Continuum\Anaconda3\lib\unittest\suite.py", line 24, in __init__
self.addTests(tests)
File "C:\Users\barnej78\AppData\Local\Continuum\Anaconda3\lib\unittest\suite.py", line 57, in addTests
for test in tests:
TypeError: __init__() takes 1 positional argument but 2 were given
If I misname my testcases to begin with a capital T, unittest runs correct, but does not apply any tests to my code.
My code is as follows:
import unittest
from regional_pos_line import Regional_pos_line as Rpl
class Testpos_line__split_columns_callback(unittest.TestCase):
def __init__(self):
pass
def test_UT22_replace_end_row(self):
self.line.split_columns_callback(self, 4, self.junk_function, 4, replace = True)
self.assertEqual(self.line.data, [0,1,2,3,5])
def test_UT23_replace_mid_row(self):
self.line.split_columns_callback(self, 1, self.junk_function, 4, replace = True)
self.assertEqual(self.line.data, [0,5,2,3,4])
def test_UT24_replace_start_row(self):
self.line.split_columns_callback(self, 0, self.junk_function, 4, replace = True)
self.assertEqual(self.line.data, [5,1,2,3,4])
def test_UT25_no_replace_end_row(self):
self.line.split_columns_callback(self, 5, self.junk_function, 4, replace = False)
self.assertEqual(self.line.data, [0,1,2,3,4,5])
def test_UT26_no_replace_mid_row(self):
self.line.split_columns_callback(self, 1, self.junk_function, 4, replace = True)
self.assertEqual(self.line.data, [0,5,1,2,3,4])
def test_UT27_no_replace_start_row(self):
self.line.split_columns_callback(self, 0, self.junk_function, 4, replace = True)
self.assertEqual(self.line.data, [5,0,1,2,3,4])
def setUp(self):
self.line = Rpl([0,1,2,3,4])
def tearDown(self):
del self.line
def junk_function(self, x):
return 5
if __name__ == '__main__':
unittest.main()
What am I doing wrong?
357
To solve this ” Typeerror: takes 1 positional argument but 2 were given ” is by adding self argument for each method inside the class. It will remove the error.
The Python "TypeError: takes 2 positional arguments but 3 were given" occurs for multiple reasons: Forgetting to specify the self argument in a class method. Forgetting to specify a third argument in a function's definition. Passing three arguments to a function that only takes two.
By default, unittest-parallel runs unit tests on all CPU cores available.
Internally, unittest. main() is using a few tricks to figure out the name of the module (source file) that contains the call to main() . It then imports this modules, examines it, gets a list of all classes and functions which could be tests (according the configuration) and then creates a test case for each of them.
Try removing init function. It looks like you don't need it.
127
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