Update testing docs: Using the new phpunit testing library

[DanielBadura]

No description provided.

[github-actions]

Hello 👋

here is the most recent benchmark result:

SimpleSetupStreamStoreBench
===========================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 1.014ms (±0.00%)   | 993.700μs (±0.00%) | +2.07%    | 34.242mb        | 34.754mb   | -1.47%      |
| benchLoad10000Events ()                | 58.022ms (±0.00%)  | 59.523ms (±0.00%)  | -2.52%    | 34.242mb        | 34.754mb   | -1.47%      |
| benchSave1Event ()                     | 1.081ms (±0.00%)   | 1.268ms (±0.00%)   | -14.75%   | 34.242mb        | 34.242mb   | 0.00%       |
| benchSave10000Events ()                | 305.393ms (±0.00%) | 314.068ms (±0.00%) | -2.76%    | 34.242mb        | 34.242mb   | 0.00%       |
| benchSave10000Aggregates ()            | 8.512s (±0.00%)    | 9.063s (±0.00%)    | -6.08%    | 34.242mb        | 34.242mb   | 0.00%       |
| benchSave10000AggregatesTransaction () | 5.214s (±0.00%)    | 5.184s (±0.00%)    | +0.57%    | 34.242mb        | 34.242mb   | 0.00%       |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SimpleSetupBench
================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 970.500μs (±0.00%) | 1.043ms (±0.00%)   | -6.98%    | 34.128mb        | 34.128mb   | 0.00%       |
| benchLoad10000Events ()                | 53.275ms (±0.00%)  | 50.734ms (±0.00%)  | +5.01%    | 34.128mb        | 34.128mb   | 0.00%       |
| benchSave1Event ()                     | 922.400μs (±0.00%) | 904.000μs (±0.00%) | +2.04%    | 34.128mb        | 34.128mb   | 0.00%       |
| benchSave10000Events ()                | 227.293ms (±0.00%) | 223.827ms (±0.00%) | +1.55%    | 34.128mb        | 34.128mb   | 0.00%       |
| benchSave10000Aggregates ()            | 8.177s (±0.00%)    | 8.031s (±0.00%)    | +1.81%    | 34.128mb        | 34.128mb   | 0.00%       |
| benchSave10000AggregatesTransaction () | 4.960s (±0.00%)    | 4.964s (±0.00%)    | -0.09%    | 34.128mb        | 34.128mb   | 0.00%       |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SnapshotsBench
==============

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad10000EventsMissingSnapshot () | 51.160ms (±0.00%)  | 52.212ms (±0.00%)  | -2.01%    | 34.202mb        | 34.202mb   | 0.00%       |
| benchLoad10000Events ()                | 905.400μs (±0.00%) | 919.600μs (±0.00%) | -1.54%    | 34.202mb        | 34.202mb   | 0.00%       |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SplitStreamBench
================

+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                         | time (kde mode)                                     | memory                                     |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                 | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad10000Events () | 4.358ms (±0.00%)   | 4.424ms (±0.00%)   | -1.49%    | 37.435mb        | 37.435mb   | 0.00%       |
| benchSave10000Events () | 352.942ms (±0.00%) | 368.418ms (±0.00%) | -4.20%    | 37.507mb        | 37.507mb   | 0.00%       |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SubscriptionEngineBatchBench
============================

+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
|                           | time (kde mode)                                   | memory                                     |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
| subject                   | Tag: <current>    | Tag: base         | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
| benchHandle10000Events () | 76.685ms (±0.00%) | 76.571ms (±0.00%) | +0.15%    | 34.597mb        | 34.597mb   | 0.00%       |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+

SubscriptionEngineBench
=======================

+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
|                           | time (kde mode)                               | memory                                     |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
| subject                   | Tag: <current>  | Tag: base       | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
| benchHandle10000Events () | 3.259s (±0.00%) | 3.242s (±0.00%) | +0.51%    | 46.745mb        | 46.745mb   | 0.00%       |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+

PersonalDataBench
=================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 896.400μs (±0.00%) | 865.300μs (±0.00%) | +3.59%    | 35.258mb        | 35.258mb   | 0.00%       |
| benchLoad10000Events ()                | 90.505ms (±0.00%)  | 90.001ms (±0.00%)  | +0.56%    | 35.258mb        | 35.258mb   | 0.00%       |
| benchSave1Event ()                     | 1.507ms (±0.00%)   | 1.528ms (±0.00%)   | -1.40%    | 35.258mb        | 35.258mb   | 0.00%       |
| benchSave10000Events ()                | 259.359ms (±0.00%) | 257.162ms (±0.00%) | +0.85%    | 35.259mb        | 35.259mb   | 0.00%       |
| benchSave10000Aggregates ()            | 12.435s (±0.00%)   | 12.364s (±0.00%)   | +0.58%    | 35.258mb        | 35.258mb   | 0.00%       |
| benchSave10000AggregatesTransaction () | 9.227s (±0.00%)    | 9.221s (±0.00%)    | +0.06%    | 35.759mb        | 35.759mb   | 0.00%       |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

This comment gets update everytime a new commit comes in!

[DavidBadura]

should be done in 3.9