interview_task_pt

TODO list

• Implementation of the shell sort method
• write unit tests for the shell sort method
• write tests for the shell sort method
• Implementation of the command grep -A NUM -B NUM pattern file
• write unit tests for grep implementation
• write tests for grep implementation

Nice to have

• Tests for programs , when we call them using CLI

Install requirements

'pip install -r requirements.txt --upgrade'

Tasks

Shell sort

Use python shellsort.py --help to know how to use it

Use coverage run test_shellsort.py && coverage report shellsort.py to run unit tests and show code coverage

Grep function

Use python grep_ab.py --help to know how to use it

Use coverage run test_grep_ab.py && coverage report grep_ab.py to run unit tests and show code coverage

Run tests

Use python run_test.py --show-plan to print all existed tests wich will be run. Also can be used parameter group to show tests in test group.

Use python run_test.py or python run_test.py --group=<group_name> In first case all tests will be run. In second case we ca choose which group will be run.

group parameter may be equal:

• shell - to run all shell sort tests
• shell_positive - to run all shell positive tests
• shell_negative - to run all shell negative tests
• Can be specified name of specific test

Known issues

• Grep utility is hanging during the run of grep -A 4 -B 3 '--' test_ok_file_1.txt
• Unit tests for grep_ab failed if pattern == '\-\-'