Replace unittests test cases by pure pytest [Wave-1]

[Taragolis]

A lot of tests still uses unittest.TestCase class as base method for test classes as well as internals of this class. May be it a good time to start convert tests to use native pytest functionality.

Total number of modules which uses unittest.TestCase

❯ grep -rl 'TestCase):' ./tests | wc -l
579

Total number of modules which uses unittest.TestCase

❯ grep -rl 'TestCase):' ./tests | cut -d"/" -f3 | sort | uniq -c | sort -nr
    428 providers
     36 charts
     23 utils
     21 cli
     10 ti_deps
     10 api_connexion
      7 operators
      6 sensors
      6 executors
      6 core
      5 www
      5 always
      4 models
      3 api
      2 task
      2 kubernetes
      1 security
      1 plugins
      1 macros
      1 hooks
      1 dag_processing

Total number of providers tests submodules which uses unittest.TestCase (by submodules)

Note: "apache", "microsoft", "common" has own sub-packages which contains separate providers

❯ grep -rl 'TestCase):' ./tests/providers/ | cut -d"/" -f5 | sort | uniq -c | sort -nr
    146 google
    108 amazon
     33 apache
     29 microsoft
      6 databricks
      4 redis
      4 qubole
      4 mysql
      4 alibaba
      3 yandex
      3 trino
      3 tableau
      3 oracle
      3 jenkins
      3 http
      3 hashicorp
      3 docker
      3 atlassian
      3 arangodb
      3 airbyte
      2 vertica
      2 telegram
      2 sqlite
      2 snowflake
      2 sftp
      2 segment
      2 salesforce
      2 presto
      2 postgres
      2 opsgenie
      2 neo4j
      2 mongo
      2 jdbc
      2 influxdb
      2 imap
      2 grpc
      2 ftp
      2 exasol
      2 discord
      2 dingding
      2 datadog
      2 common
      2 cncf
      2 asana
      1 ssh
      1 singularity
      1 sendgrid
      1 samba
      1 papermill
      1 openfaas
      1 elasticsearch
      1 cloudant
      1 celery

This PR focus on only simple changes in tests exclude providers and charts:

• Remove base class unittest.TestCase
• setUp method -> setup_method
• tearDown method -> teardown_method
• setUpClass classmethod -> setup_class
• tearDownClass -> teardown_class
• parameterized.expand decorator -> pytest.mark.parametrize
• self.assertRaises context manager -> pytest.raises

Result after changes

❯ grep -rl 'TestCase' ./tests | cut -d"/" -f3 | sort | uniq -c | sort -nr
    428 providers
     36 charts
      4 operators
      2 utils
      2 models
      2 cli
      2 always
      1 www
      1 test_utils
      1 sensors
      1 security
      1 executors
      1 core

[Taragolis]

Just add todo to figure out later why implementation same as test_does_send_stats_using_dogstatsd_when_dogstatsd_on

[Taragolis]

Also "fix" this test seems like it just copy of test_python_callable_none but name of the test more related to doc_md attribute

[uranusjr]

I didn’t read everything, but this seems straightforward enough from the 10-ish files I sampled. This should be good as long as CI passes.

[potiuk]

COOL!