Tests: 8XXX used as default port range.

After the launch of the project, the testing infrastructure was shared with
nginx project in some cases. To avoid port overlap, a decision was made
to shift

Tests: 8XXX used as default port range.

After the launch of the project, the testing infrastructure was shared with
nginx project in some cases. To avoid port overlap, a decision was made
to shift the port range for Unit tests. This problem was resolved a long time
ago and is no longer relevant, so it is now safe to use port 8XXX range as the
default, as it is more appropriate for testing purposes.

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Tests: get rid of classes in test files.

Class usage came from the unittest framework and it was always redundant
after migration to the pytest. This commit removes classes from files
containing te

Tests: get rid of classes in test files.

Class usage came from the unittest framework and it was always redundant
after migration to the pytest. This commit removes classes from files
containing tests to make them more readable and understandable.

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Tests: prerequisites checking reworked.

Prerequisites check moved to the module level to simplify class structure.
Discovery and prerequisites checks functions moved to the separate files.
Introduce

Tests: prerequisites checking reworked.

Prerequisites check moved to the module level to simplify class structure.
Discovery and prerequisites checks functions moved to the separate files.
Introduced "require" fixture to provide per-test requirements check.

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Tests: unified setup method usage.

To make fixtures accessible inside of setup methods in tests all these methods
are renamed to the "setup_method_fixture" and decorated by autouse flag.

Also all s

Tests: unified setup method usage.

To make fixtures accessible inside of setup methods in tests all these methods
are renamed to the "setup_method_fixture" and decorated by autouse flag.

Also all setup methods moved to the top of the files.

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Tests: removed unused variables.

Tests: switched to using f-strings.

Previously, it was necessary to support older versions of Python for
compatibility. F-strings were released in Python 3.6. Python 3.5 was
marked as unsupported

Tests: switched to using f-strings.

Previously, it was necessary to support older versions of Python for
compatibility. F-strings were released in Python 3.6. Python 3.5 was
marked as unsupported by the end of 2020, so now it's possible to start
using f-strings safely for better readability and performance.

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Tests: don't try to return response when "no_recv" is True.

HTTP: fixed cookie parsing.

The fixing supports the cookie value with the '=' character.

This is related to #756 PR on Github.
Thanks to changxiaocui.

Tests: added tests with UNIX sockets in "source".

Tests: style.

Tests: fixed type of applications.

Tests: added more tests for "query" routing pattern.

Router: matching query string support.

The "query" option matches decoded arguments, including plus ('+') to
space (' '). Like "uri", it can be a string or an array of strings.

Tests: style.

Router: fixed crash when matching an empty address pattern array.

A crash would occur when the router tried to match an
against an empty address pattern array.

The following configuration was used

Router: fixed crash when matching an empty address pattern array.

A crash would occur when the router tried to match an
against an empty address pattern array.

The following configuration was used to reproduce the
issue:

{
"listeners": {
"127.0.0.1:8082": {
"pass": "routes"
}
},
"routes": [
{
"match": {
"source": []
},
"action": {
"return": 200
}
}
]
}

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Tests: minor fixes.

Tests: style.

Tests: removed skip_alert().

Tests: added regex check.

Tests: added missing checks for configuration results.

Tests: style.

Tests: skip_alert() converted to the fixture.

Tests: options moved to the separate class.

This change is necessary to separate the logic
and prevent possible circular dependency.

Router: matching regular expressions support.

Tests: fixed unit.log print.