def test_b_function_correct_output_free_space(self):
"""[Lab 3] - [Investigation 2] - [Part 2] - functions & subprocess - Test output shows free space of root"""
# Try to import before testing
try:
import lab3d as lab3dStudent
except:
self.fail(
'lab3d.py contains errors(HINT: run the function and fix errors'
)
p = subprocess.Popen(["df -h | grep '/$' | awk '{print $4}'"],
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=True)
stdout, err = p.communicate()
try:
error_output = 'wrong output(HINT: show root directory free space only)'
self.assertEqual(stdout.decode('utf-8').strip(),
lab3dStudent.free_space().decode('utf-8').strip(),
msg=error_output)
except AttributeError:
error_output = 'did you already decode utf-8(HINT: you will need to do this later)'
# If they already decoded the string an error will be raised this except fixes problem
self.assertEqual(stdout.decode('utf-8').strip(),
lab3dStudent.free_space().strip(),
msg=error_output)
def test_a_function_free_space(self):
"""[Lab 3] - [Investigation 2] - [Part 2] - functions & subprocess - Test function succeeds with 0 arguments"""
# Try to import before testing
try:
import lab3d as lab3dStudent
except:
self.fail(
'lab3d.py contains errors(HINT: run the function and fix errors'
)
# Test function
try:
lab3dStudent.free_space()
except:
self.fail(
'free_space() function contains errors(HINT: run the function and fix errors'
)
def test_d_function_strip_free_space(self):
"""[Lab 3] - [Investigation 2] - [Part 2] - functions & subprocess - strip the new line character with string.strip() successfully """
# Try to import before testing
try:
import lab3d as lab3dStudent
except:
self.fail(
'lab3d.py contains errors(HINT: run the function and fix errors'
)
p = subprocess.Popen(["df -h | grep '/$' | awk '{print $4}'"],
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=True)
stdout, err = p.communicate()
error_output = 'output did not strip new line character(HINT: use string.strip() to remove)'
self.assertNotEqual(stdout.decode('utf-8'),
lab3dStudent.free_space(),
msg=error_output)
def test_c_function_decode_free_space(self):
"""[Lab 3] - [Investigation 2] - [Part 2] - functions & subprocess - decode to utf-8 with string.decode('utf-8') successfully"""
# Try to import before testing
try:
import lab3d as lab3dStudent
except:
self.fail(
'lab3d.py contains errors(HINT: run the function and fix errors'
)
p = subprocess.Popen(["df -h | grep '/$' | awk '{print $4}'"],
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=True)
stdout, err = p.communicate()
error_output = 'output did not decode to utf-8(HINT: use string.decode(\'utf-8\') to decode)'
# encode is used to turn unicode strings into bytes, decode turns bytes into unicode strings
self.assertEqual(type(stdout.decode('utf-8')),
type(lab3dStudent.free_space()),
msg=error_output)
import subprocess import lab3d lab3d.free_space()
