Refactor/173 use proper retry

[mgappa]

Description

To use less memory consumption, we must, first of all, add some tests on the current code and, second of all, apply some refactoring on the retry part. On this PR, we add:

• Test the CWPP compute_execute method, and fix unit.py test file
• Refactor the retry method by using the combination of Retry class from urlib3 and Session request library
• Add coverage and responses libraries for test purposes to get the code coverage and simplify the unit test writing

Motivation and Context

This PR is the first step for the issue #173

How Has This Been Tested?

To test the code, you must install the dependencies in the requirements_test.txt file, with the pip install -r requirements_test.txt command. Then, you can execute all tests with the following command coverage run -m unittest discover -v -s "./tests" -p "test*.py". Finally, you can look at the coverage result by taping the command coverage report -m or if you are looking for a nicer presentation, you can tape the command coverage html

Screenshots (if appropriate)

Coverage on the main branch:

$ coverage run -m unittest discover -v -s "./tests" -p "*.py"
unit (unittest.loader._FailedTest) ... ERROR

======================================================================
ERROR: unit (unittest.loader._FailedTest)
----------------------------------------------------------------------
ImportError: Failed to import test module: unit
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/unittest/loader.py", line 436, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/local/lib/python3.9/unittest/loader.py", line 377, in _get_module_from_name
    __import__(name)
  File "/workspaces/new-prismacloud-api-python/tests/unit.py", line 5, in <module>
    import mock
ModuleNotFoundError: No module named 'mock'


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

FAILED (errors=1)

Coverage on the mgappa:refactor/173_use_proper_retry branch:

$ coverage run -m unittest discover -v -s "./tests" -p "test*.py"
test_excute_compute_nominal_for_tag_update (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_failed_all_hosts_list_because_unexpected_status_code_using_force_parameter (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_failed_all_hosts_list_because_unexpected_status_code_without_force_parameter (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_failed_because_bad_status_code (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_nominal_for_credentials_list (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_nominal_for_hosts_list (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_retry_failed_for_credentials_list (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_retry_for_credentials_list (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_with_an_expire_token_for_credentials_list (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_with_csv_content_type (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_execute_compute_without_token_for_credentials_list (test_cwpp_cwpp.TestCasePrismaCloudAPICWPPMixin) ... ok
test_pc_api_configure (test_unit.TestPrismaCloudAPI) ... ok
test_pc_api_current_user (test_unit.TestPrismaCloudAPI) ... ok

----------------------------------------------------------------------
Ran 13 tests in 0.672s

OK

Report:

$ coverage report -m
Name                                       Stmts   Miss  Cover   Missing
------------------------------------------------------------------------
prismacloud/api/__init__.py                   11      1    91%   14
prismacloud/api/cspm/__init__.py               7      0   100%
prismacloud/api/cspm/_endpoints.py           267    162    39%   39, 42, 45, 48, 51, 69, 72, 75-76, 79, 82-83, 86, 89, 92, 105, 108-112, 115-116, 119, 132, 135, 138, 141, 154, 157, 170, 173, 189-190, 193-194, 207, 210, 213, 216, 219, 222, 235, 238, 241, 244, 247, 262, 265, 268, 271, 275, 278, 293, 296, 299, 302, 305, 308, 311, 314, 327, 330, 333, 336, 339, 355, 358, 374, 377, 390-391, 394, 397-411, 426, 429, 432, 435, 438, 453, 456, 469, 472, 475, 488, 491, 494, 509, 512, 515, 518, 539-552, 555-558, 561-577, 580-593, 596-597, 600-601, 604, 617, 633, 636, 639, 642, 655, 658, 661, 675, 678, 691-692, 705
prismacloud/api/cspm/_extended.py             57     53     7%   11-45, 48-67
prismacloud/api/cspm/cspm.py                 120     58    52%   34-38, 44, 46, 49-69, 77, 84, 91, 104-108, 111, 113, 115, 123-127, 129-136, 140-144, 155-156, 162-163
prismacloud/api/cwpp/__init__.py              24      0   100%
prismacloud/api/cwpp/_audits.py               25     17    32%   11-12, 19-26, 31-33, 39, 66-67, 72-73
prismacloud/api/cwpp/_cloud.py                13      6    54%   9, 14, 17, 20, 23, 26
prismacloud/api/cwpp/_collections.py          11      5    55%   9, 12, 18, 21, 24
prismacloud/api/cwpp/_containers.py            6      4    33%   9-13
prismacloud/api/cwpp/_credentials.py          10      4    60%   12, 15, 21, 26
prismacloud/api/cwpp/_defenders.py             7      4    43%   9-10, 13-14
prismacloud/api/cwpp/_feeds.py                 5      2    60%   11, 29
prismacloud/api/cwpp/_hosts.py                13      8    38%   10-11, 14-15, 18-19, 22-23
prismacloud/api/cwpp/_images.py                9      6    33%   9-13, 16-17
prismacloud/api/cwpp/_logs.py                 13      8    38%   11-12, 15-16, 19-20, 23-24
prismacloud/api/cwpp/_policies.py             11      5    55%   9, 12, 17, 20, 23
prismacloud/api/cwpp/_registry.py             15     10    33%   9-13, 16-17, 20-21, 24-25
prismacloud/api/cwpp/_scans.py                 6      4    33%   9-13
prismacloud/api/cwpp/_serverless.py           13      8    38%   6-7, 11-12, 16-17, 21-22
prismacloud/api/cwpp/_settings.py             17      8    53%   9, 12, 18, 21, 27, 30, 36, 39
prismacloud/api/cwpp/_stats.py                27     13    52%   8, 12, 15, 20, 25, 30, 34, 37, 41, 44, 48, 51, 56
prismacloud/api/cwpp/_status.py                5      2    60%   7, 10
prismacloud/api/cwpp/_tags.py                 19     12    37%   9-10, 13-14, 17-18, 21-22, 25-26, 29-30
prismacloud/api/cwpp/_vms.py                   4      2    50%   11-13
prismacloud/api/cwpp/cwpp.py                  83     13    84%   17-21, 71, 88, 98-103, 127-128, 135
prismacloud/api/pc_lib_api.py                 62      3    95%   56, 87, 93
prismacloud/api/pc_lib_utility.py            286    224    22%   23-27, 43-48, 54-114, 121-167, 173-211, 216-228, 234-254, 260-268, 275, 293-301, 307-312, 318-323, 328-336, 341-352, 358-364, 370-377, 383-389, 395-402, 408-414, 420-427, 433
prismacloud/api/pccs/__init__.py              14      0   100%
prismacloud/api/pccs/_checkov_version.py       4      2    50%   9-10
prismacloud/api/pccs/_code_policies.py         5      3    40%   9-14
prismacloud/api/pccs/_errors.py               17      8    53%   9, 12, 15, 18, 21, 24, 27, 30
prismacloud/api/pccs/_fixes.py                 5      2    60%   9, 12
prismacloud/api/pccs/_packages.py              3      1    67%   9
prismacloud/api/pccs/_repositories.py         11      5    55%   9, 12, 15, 18, 21
prismacloud/api/pccs/_rules.py                 9      4    56%   9, 12, 15, 18
prismacloud/api/pccs/_scans.py                 3      1    67%   9
prismacloud/api/pccs/_suppressions.py         11      5    55%   9, 12, 15, 18, 21
prismacloud/api/pccs/pccs.py                  71     64    10%   13-88, 94
prismacloud/api/version.py                     1      0   100%
tests/data.py                                  5      0   100%
tests/test_cwpp_cwpp.py                       95      0   100%
tests/test_unit.py                            15      0   100%
------------------------------------------------------------------------
TOTAL                                       1415    737    48%

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes if appropriate.
• All new and existing tests passed.