how to skip python unittest with a global parameter

Create a decorator like:

graphical_test = unittest.skipIf(
   os.environ.get('GRAPHICAL_TESTS', False), 'Non graphical tests only'
)

Suggestion : 2

Skipping a test is simply a matter of using the skip() decorator or one of its conditional variants, calling TestCase.skipTest() within a setUp() or test method, or raising SkipTest directly.,Usually you can use TestCase.skipTest() or one of the skipping decorators instead of raising this directly.,Calling this during a test method or setUp() skips the current test. See Skipping tests and expected failures for more information.,It’s easy to roll your own skipping decorators by making a decorator that calls skip() on the test when it wants it to be skipped. This decorator skips the test unless the passed object has a certain attribute:

import unittest

class TestStringMethods(unittest.TestCase):

   def test_upper(self):
   self.assertEqual('foo'.upper(), 'FOO')

def test_isupper(self):
   self.assertTrue('FOO'.isupper())
self.assertFalse('Foo'.isupper())

def test_split(self):
   s = 'hello world'
self.assertEqual(s.split(), ['hello', 'world'])
# check that s.split fails when the separator is not a string
with self.assertRaises(TypeError):
   s.split(2)

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

...
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Ran 3 tests in 0.000 s

OK

test_isupper(__main__.TestStringMethods)...ok
test_split(__main__.TestStringMethods)...ok
test_upper(__main__.TestStringMethods)...ok

   -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Ran 3 tests in 0.001 s

OK

python - m unittest test_module1 test_module2
python - m unittest test_module.TestClass
python - m unittest test_module.TestClass.test_method

python - m unittest tests / test_something.py

python - m unittest - v test_module

Suggestion : 3

06/07/2022

We know from experience that one thing a withdrawal from a checking account must do is to make sure that the amount withdrawn is less than the account balance. So we override the IAccount.Withdraw method in CheckingAccount with a method that checks for this condition. The method might look like this:

public void Withdraw(double amount) {
   if (m_balance >= amount) {
      m_balance -= amount;
   } else {
      throw new ArgumentException(nameof(amount), "Withdrawal exceeds balance!");
   }
}

To test the CheckingAccount.Withdraw method of our example, we can write two tests: one that verifies the standard behavior of the method, and one that verifies that a withdrawal of more than the balance will fail (The following code shows an MSTest unit test, which is supported in .NET.). In the CheckingAccountTests class, we add the following methods:

[TestMethod]
public void Withdraw_ValidAmount_ChangesBalance()
{
    // arrange
    double currentBalance = 10.0;
    double withdrawal = 1.0;
    double expected = 9.0;
    var account = new CheckingAccount("JohnDoe", currentBalance);

    // act
    account.Withdraw(withdrawal);

    // assert
    Assert.AreEqual(expected, account.Balance);
}

[TestMethod]
public void Withdraw_AmountMoreThanBalance_Throws()
{
    // arrange
    var account = new CheckingAccount("John Doe", 10.0);

    // act and assert
    Assert.ThrowsException<System.ArgumentException>(() => account.Withdraw(20.0));
}

If you're using the MSTest framework, you can use the TimeoutAttribute to set a timeout on an individual test method:

[TestMethod]
[Timeout(2000)] // Milliseconds
public void My_Test() {
   ...
}

To create a data-driven test for the AddIntegerHelper method, we first create an Access database named AccountsTest.accdb and a table named AddIntegerHelperData. The AddIntegerHelperData table defines columns to specify the first and second operands of the addition and a column to specify the expected result. We fill a number of rows with appropriate values.

[DataSource(
   @ "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Projects\MyBank\TestData\AccountsTest.accdb",
   "AddIntegerHelperData"
)]
[TestMethod()]
public void AddIntegerHelper_DataDrivenValues_AllShouldPass() {
   var target = new CheckingAccount();
   int x = Convert.ToInt32(TestContext.DataRow["FirstNumber"]);
   int y = Convert.ToInt32(TestContext.DataRow["SecondNumber"]);
   int expected = Convert.ToInt32(TestContext.DataRow["Sum"]);
   int actual = target.AddIntegerHelper(x, y);
   Assert.AreEqual(expected, actual);
}

Suggestion : 4

Skipping a test is simply a matter of using the skip() decorator or one of its conditional variants.,Usually you can use TestCase.skipTest() or one of the skipping decorators instead of raising this directly.,It’s easy to roll your own skipping decorators by making a decorator that calls skip() on the test when it wants it to be skipped. This decorator skips the test unless the passed object has a certain attribute:,Calling this during a test method or setUp() skips the current test. See Skipping tests and expected failures for more information.

import random
import unittest

class TestSequenceFunctions(unittest.TestCase):

   def setUp(self):
   self.seq = range(10)

def test_shuffle(self):
   # make sure the shuffled sequence does not lose any elements
random.shuffle(self.seq)
self.seq.sort()
self.assertEqual(self.seq, range(10))

# should raise an exception
for an immutable sequence
self.assertRaises(TypeError, random.shuffle, (1, 2, 3))

def test_choice(self):
   element = random.choice(self.seq)
self.assertTrue(element in self.seq)

def test_sample(self):
   with self.assertRaises(ValueError):
   random.sample(self.seq, 20)
for element in random.sample(self.seq, 5):
   self.assertTrue(element in self.seq)

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

...
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Ran 3 tests in 0.000 s

OK

suite = unittest.TestLoader().loadTestsFromTestCase(TestSequenceFunctions)
unittest.TextTestRunner(verbosity = 2).run(suite)

test_choice(__main__.TestSequenceFunctions)...ok
test_sample(__main__.TestSequenceFunctions)...ok
test_shuffle(__main__.TestSequenceFunctions)...ok

   -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Ran 3 tests in 0.110 s

OK

python - m unittest test_module1 test_module2
python - m unittest test_module.TestClass
python - m unittest test_module.TestClass.test_method

python - m unittest - v test_module

Suggestion : 5

Support for skipping tests has been added since Python 2.7. It is possible to skip individual test method or TestCase class, conditionally as well as unconditionally. The framework allows a certain test to be marked as an 'expected failure'. This test will 'fail' but will not be counted as failed in TestResult.,Alternate syntax for skipping test is using instance method skipTest() inside the test function.,Unconditionally skip the decorated test. reason should describe why the test is being skipped.,To skip a method unconditionally, the following unittest.skip() class method can be used −

To skip a method unconditionally, the following unittest.skip() class method can be used −

import unittest

def add(x, y):
   return x + y

class SimpleTest(unittest.TestCase):
   @unittest.skip("demonstrating skipping")
def testadd1(self):
   self.assertEquals(add(4, 5), 9)

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

When the above script is executed, the following result is displayed on console −

C: \Python27 > python skiptest.py
s
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Ran 1 test in 0.000 s

OK(skipped = 1)

Alternate syntax for skipping test is using instance method skipTest() inside the test function.

def testadd2(self):
   self.skipTest("another method for skipping")
self.assertTrue(add(4 + 5) == 10)

When the above script is run, two skipped tests show 's' and the expected failure is shown as 'x'.

C: \Python27 > python skiptest.py
Fsxs
   ===
   === === === === === === === === === === === === === === === === === === === === =
   FAIL: testadd(__main__.suiteTest)
Add
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Traceback(most recent call last):
   File "skiptest.py", line 9, in testadd
self.assertEqual(result, 100)
AssertionError: 90 != 100

   -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Ran 4 tests in 0.000 s

FAILED(failures = 1, skipped = 2, expected failures = 1)

Suggestion : 6

Say, you’ve written a number of unit tests using the unittest module in Pyhton. How can you disable specific unit tests temporarily? In other words:,You can disable individual tests by placing the @unittest.skip decorator in front of the function, class, or method definition.,How to skip a unit test in Python’s unittest module?,While working as a researcher in distributed systems, Dr. Christian Mayer found his love for teaching computer science students.

Example: Given the following three unit tests.

def test_1():
   print('Test case 1')

def test_2():
   print('Test case 2')

def test_3():
   print('Test case 3')

Here’s how you’d skip unit tests 1 and 2 in the provided example.

@unittest.skip('Reason for skipping')
def test_1():
   print('Test case 1')

@unittest.skip
def test_2():
   print('Test case 2')

def test_3():
   print('Test case 3')

A simple and dirty, but effective method to skip tests is to prefix them with a single underscore. For example, rename your unit test function test_1 to _test_1 and it will be disabled.

def _test_1():
   print('Test case 1')

def _test_2():
   print('Test case 2')

def test_3():
   print('Test case 3')

You can see all three ways to skip the execution of the unit test in the following summarized example:

import unittest

class TestStringMethods(unittest.TestCase):

   def _test_1(self):
   print('test 1')

# def test_2(self):
   # print('test 2')

@unittest.skip
def test_3(self):
   print('test 3')

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

Suggestion : 7

In the earlier example, we pass the integer number to test sum(); what happens if we pass the bad value, such as a single integer or a string?,Creating inputs such as static value for the input like a string or numbers is a slightly complex task. Sometimes, we need to create an instance of a class or a context.,In the above code, we imported sum() from the my_sum package that we created. We have defined the Checkclass, which inherits from unittest.TestCase. There is a test methods - .test_list_int(), to test the integer.,Above line will return the right result because values are correct. If we pass the wrong arguments it will return the Assertion error. For example -

$ python sum.py
Everything is correct

Everything is correct
Traceback (most recent call last):
File "<string>", line 13, in <module>
      File "<string>", line 9, in test_sum_tuple
         AssertionError: It should be 10

.F
-
FAIL: test_sum_tuple (__main__.TestingSum)
--
Traceback (most recent call last):
File "<string>", line 11, in test_sum_tuple
   AssertionError: 9 != 10 : It should be 10

   ----------------------------------------------------------------------
   Ran 2 tests in 0.001s

   FAILED (failures=1)
   Traceback (most recent call last):
   File "<string>", line 14, in <module>
         File "/usr/lib/python3.8/unittest/main.py", line 101, in __init__
         self.runTests()
         File "/usr/lib/python3.8/unittest/main.py", line 273, in runTests
         sys.exit(not self.result.wasSuccessful())
         SystemExit: True

FAIL: test_sum_tuple(__main__.TestSum)
   --
Traceback(most recent call last):
   File "test_sum_unittest.py", line 10, in test_sum_tuple
self.assertEqual(sum((2, 3, 5)), 10, "It should be 10")
AssertionError: It should be 10

   --
Ran 2 tests in 0.001 s

FAILED(failures = 1)

.
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Ran 1 test in 0.000 s

OK

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