added tests for EventChats

[guptapriyanshu7]

What kind of change does this PR introduce?

Added test for EventChats widget

Issue Number:

Fixes #1231

Did you add tests for your changes?

Yes

Have you read the contributing guide?

Yes

[codecov-commenter]

Codecov Report

Merging #1282 (8e59346) into develop (615b5b6) will increase coverage by 0.54%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1282      +/-   ##
===========================================
+ Coverage    60.08%   60.62%   +0.54%     
===========================================
  Files          125      125              
  Lines         6363     6360       -3     
===========================================
+ Hits          3823     3856      +33     
+ Misses        2540     2504      -36     

Impacted Files	Coverage Δ
lib/views/pre_auth_screens/set_url.dart	94.49% <0.00%> (-0.06%)	⬇️
lib/main.dart	1.56% <0.00%> (ø)
lib/view_model/lang_view_model.dart	100.00% <0.00%> (ø)
...model/pre_auth_view_models/set_url_view_model.dart	100.00% <0.00%> (ø)
.../pre_auth_screens/waiting_to_join_private_org.dart	100.00% <0.00%> (+1.66%)	⬆️
lib/widgets/custom_list_tile.dart	78.66% <0.00%> (+2.66%)	⬆️
lib/views/pre_auth_screens/change_password.dart	100.00% <0.00%> (+3.22%)	⬆️
lib/widgets/post_widget.dart	88.09% <0.00%> (+3.57%)	⬆️
lib/views/pre_auth_screens/recover.dart	100.00% <0.00%> (+4.16%)	⬆️
lib/models/post/post_model.dart	61.36% <0.00%> (+6.81%)	⬆️
... and 3 more

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