🎉Source Harvest: increase unit test coverage at least 90%

[lazebnyi]

What

#15219 - Source Harvest: increase unit test coverage at least 90%

How

Increased unit test coverage to 90% and updated docs to template.

Recommended reading order

1. x.java
2. y.python

Pre-merge Checklist

Updating a connector

Community member or Airbyter

• Grant edit access to maintainers (instructions)
• Secrets in the connector's spec are annotated with airbyte_secret
• Unit & integration tests added and passing. Community members, please provide proof of success locally e.g: screenshot or copy-paste unit, integration, and acceptance test output. To run acceptance tests for a Python connector, follow instructions in the README. For java connectors run ./gradlew :airbyte-integrations:connectors:<name>:integrationTest.
• Code reviews completed
• Documentation updated
  • Connector's README.md
  • Connector's bootstrap.md. See description and examples
  • Changelog updated in docs/integrations/<source or destination>/<name>.md including changelog. See changelog example
• PR name follows PR naming conventions

[lazebnyi]

/test connector=connectors/source-harvest

🕑 connectors/source-harvest https://github.com/airbytehq/airbyte/actions/runs/2817705675
✅ connectors/source-harvest https://github.com/airbytehq/airbyte/actions/runs/2817705675
Python tests coverage:

Name                                                 Stmts   Miss  Cover
------------------------------------------------------------------------
source_acceptance_test/utils/__init__.py                 6      0   100%
source_acceptance_test/tests/__init__.py                 4      0   100%
source_acceptance_test/__init__.py                       2      0   100%
source_acceptance_test/tests/test_full_refresh.py       52      2    96%
source_acceptance_test/utils/asserts.py                 37      2    95%
source_acceptance_test/config.py                        82      6    93%
source_acceptance_test/utils/json_schema_helper.py     105     13    88%
source_acceptance_test/tests/test_incremental.py       121     25    79%
source_acceptance_test/utils/common.py                  77     17    78%
source_acceptance_test/tests/test_core.py              355    107    70%
source_acceptance_test/utils/compare.py                 62     23    63%
source_acceptance_test/base.py                          10      4    60%
source_acceptance_test/utils/connector_runner.py       110     48    56%
------------------------------------------------------------------------
TOTAL                                                 1023    247    76%
Name                         Stmts   Miss  Cover
------------------------------------------------
source_harvest/auth.py          11      0   100%
source_harvest/__init__.py       2      0   100%
source_harvest/source.py        33      1    97%
source_harvest/streams.py      166     16    90%
------------------------------------------------
TOTAL                          212     17    92%

Build Passed

Test summary info:

All Passed