Update pytest examples for contributors

[dbeatty10]

resolves #9788

Problem

These pytest example commands don't work for me when following the contributing instructions:

# run all unit tests in a file
python3 -m pytest tests/unit/test_graph.py
# run a specific unit test
python3 -m pytest tests/unit/test_graph.py::GraphTest::test__dependency_list
# run specific Postgres functional tests
python3 -m pytest tests/functional/sources

Instead, I get errors like this:

E       AttributeError: 'Namespace' object has no attribute 'SEND_ANONYMOUS_USAGE_STATS'

core/dbt/contracts/graph/manifest.py:1647: AttributeError
========================================== short test summary info ==========================================
FAILED tests/unit/test_graph.py::GraphTest::test__dependency_list - AttributeError: 'Namespace' object has no attribute 'SEND_ANONYMOUS_USAGE_STATS'

Solution

These would probably be better examples to use (and they worked for me):

# run all unit tests in a file
python3 -m pytest tests/unit/test_base_column.py
# run a specific unit test
python3 -m pytest tests/unit/test_base_column.py::TestNumericType::test__numeric_type
# run specific Postgres functional tests
python3 -m pytest tests/functional/sources

Testing

Manual testing of the code examples within CONTRIBUTING.md is sufficient to complete this issue since it doesn't affect the delivered code.

I tested that the updated example commands run without any errors.

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• Tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc)
• This PR does not include any new type annotations because there are not any new and modified functions

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.04%. Comparing base (c6c0c79) to head (4311be9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9800      +/-   ##
==========================================
- Coverage   88.09%   88.04%   -0.05%     
==========================================
  Files         178      178              
  Lines       22461    22461              
==========================================
- Hits        19787    19776      -11     
- Misses       2674     2685      +11     

Flag	Coverage Δ
integration	85.42% <ø> (-0.14%)	⬇️
unit	61.73% <ø> (ø)

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[emmyoop]

Thank you!