Python Unit Test Automation

Listing 3-8.  test_module07.py
import unittest
class TestClass08(unittest.TestCase):
        def test_case01(self):
                self.assertTrue("PYTHON".isupper())
                print("\nIn test_case1()")
        def test_case02(self):
                self.assertTrue("Python".isupper())
                print("\nIn test_case2()")
        def test_case03(self):
                self.assertTrue(True)
                print("\nIn test_case3()")

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Chapter 3 
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 Unittest
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You already know that -v stands for verbose mode. The following is the output in 
verbose mode:
test_case01 (test_module07.TestClass08) ...
In test_case1()
ok
test_case02 (test_module07.TestClass08) ... FAIL
test_case03 (test_module07.TestClass08) ...
In test_case3()
ok
======================================================================
FAIL: test_case02 (test_module07.TestClass08)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/pi/book/code/chapter03/test/test_module07.py", line 11, in 
test_case02
    self.assertTrue("Python".isupper())
AssertionError: False is not true
----------------------------------------------------------------------
Ran 3 tests in 0.012s
FAILED (failures=1)
The option -q stands for quiet mode. Run the following command to demonstrate 
quiet mode:
python3 -m unittest -q test_module07
The output is as follows:
In test_case1()
In test_case3()
======================================================================
FAIL: test_case02 (test_module07.TestClass08)
----------------------------------------------------------------------
Traceback (most recent call last):
   File "/home/pi/book/code/chapter03/test/test_module07.py", line 11, in 
test_case02
    self.assertTrue("Python".isupper())
AssertionError: False is not true
----------------------------------------------------------------------
Ran 3 tests in 0.005s
FAILED (failures=1)

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Chapter 3 
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 Unittest
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The option -f stands for failsafe. It forcefully stops execution as soon as the first test 
case fails. Run the following command to initiate failsafe mode:
python3 -m unittest -q test_module07
The following is the output in failsafe mode:
In test_case1()
.F
======================================================================
FAIL: test_case02 (test_module07.TestClass08)
----------------------------------------------------------------------
Traceback (most recent call last):
   File "/home/pi/book/code/chapter03/test/test_module07.py", line 11, in 
test_case02
    self.assertTrue("Python".isupper())
AssertionError: False is not true
----------------------------------------------------------------------
Ran 2 tests in 0.004s
FAILED (failures=1)
You can also use more than one option. For example, you can combine verbose with 
failsafe using the following command:
python3 -m unittest -fv test_module07
The output is as follows:
test_case01 (test_module07.TestClass08) ...
In test_case1()
ok
test_case02 (test_module07.TestClass08) ... FAIL
======================================================================
FAIL: test_case02 (test_module07.TestClass08)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/pi/book/code/chapter03/test/test_module07.py", line 11, in 
test_case02
    self.assertTrue("Python".isupper())
AssertionError: False is not true
----------------------------------------------------------------------
Ran 2 tests in 0.005s
FAILED (failures=1)

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As an exercise, try to use different combinations of command-line options.
Creating a Test Package
Up until now, you have created and executed test modules individually. However, you 
can use Python’s built-in packaging feature to create a package of tests. This is standard 
practice in complex projects with large codebases.
Figure 
3-1
 shows a snapshot of the current test directory where you are saving your 
test modules.
Now, let’s create a package of test modules. Create an __init__.py file in the test 
directory. Add the code in Listing 
3-9
 to the __init__.py file,