Add Missing Test for getCustomSortingPillDirectionsLabel with invalid direction

[lrljoe]

Add Missing Test for getCustomSortingPillDirectionsLabel with invalid direction

        $column = Column::make('Name', 'name');
        $defaultString = __($this->basicTable->getLocalisationPath().'not_applicable');

        $this->assertSame('A-Z', $column->getCustomSortingPillDirectionsLabel('asc'));
        $this->assertSame('Z-A', $column->getCustomSortingPillDirectionsLabel('desc'));
        $this->assertSame($defaultString, $column->getCustomSortingPillDirectionsLabel('faulty_string'));

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.49%. Comparing base (b2ddbb7) to head (d235860).

Additional details and impacted files

@@                Coverage Diff                @@
##             development    #2130      +/-   ##
=================================================
+ Coverage          90.47%   90.49%   +0.02%     
  Complexity          1945     1945              
=================================================
  Files                201      201              
  Lines               4388     4388              
=================================================
+ Hits                3970     3971       +1     
+ Misses               418      417       -1     

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