Drupal Coding Standards Issues | phpcs

The problem

The code is not following coding standard. getting following issues errors and warnings.

FILE: ...b/add_to_calendar/tests/src/Functional/AddToCalendarBaseTest.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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48 | WARNING | Unused variable $entity_type_manager.
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FILE: ...ib/add_to_calendar/tests/src/Kernel/AddToCalendarDisplayTest.php
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FOUND 9 ERRORS AND 2 WARNINGS AFFECTING 8 LINES
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5 | ERROR | [x] Non-namespaced classes/interfaces/traits should
| | not be referenced with use statements
6 | ERROR | [x] Non-namespaced classes/interfaces/traits should
| | not be referenced with use statements
12 | WARNING | [x] Unused use statement
12 | ERROR | [x] Non-namespaced classes/interfaces/traits should
| | not be referenced with use statements
46 | ERROR | [ ] The array declaration extends to column 116 (the
| | limit is 80). The array content should be split
| | up over multiple lines
78 | WARNING | [x] A comma should follow the last multiline array
| | item. Found: 'full_html'
87 | ERROR | [x] Expected 1 space between comma and "'\r'"; 0
| | found
87 | ERROR | [x] Expected one space after the comma, 0 found
122 | ERROR | [x] Expected 1 space between comma and "'\r'"; 0
| | found
122 | ERROR | [x] Expected one space after the comma, 0 found
159 | ERROR | [ ] Protected method name
| | "AddToCalendarDisplayTest::getUTCEquivalentOfUserNowAsTimestamp"
| | is not in lowerCamel format
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PHPCBF CAN FIX THE 9 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Time: 1.67 secs; Memory: 12MB