BookingTest_AJAX_Test: proper cleanup of created database table

[nelarsen]

Mit Bezug auf #1605 ist das Ziel dieser PR, die u.g. Warnung loszuwerden. Sie kam zu stande, weil die Tests in BookingTest_AJAX_Test die DB-Tabelle wptests_cb_bookingcodes erstellen, aber nicht wieder löschen. Die Lösung ist, die Tabelle in tearDown() ordentlich zu löschen.

WordPress database error Table 'wptests_cb_bookingcodes' already exists for query CREATE TABLE wptests_cb_bookingcodes (
date date DEFAULT '0000-00-00' NOT NULL,
timeframe bigint(20) unsigned NOT NULL,
location bigint(20) unsigned NOT NULL,
item bigint(20) unsigned NOT NULL,
code varchar(100) NOT NULL,
PRIMARY KEY (date, timeframe, location, item, code)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_520_ci; made by PHPUnit\TextUI\Command::main, PHPUnit\TextUI\Command->run, PHPUnit\TextUI\TestRunner->run, PHPUnit\Framework\TestSuite->run, PHPUnit\Framework\TestSuite->run, PHPUnit\Framework\TestSuite->run, PHPUnit\Framework\TestCase->run, PHPUnit\Framework\TestResult->run, PHPUnit\Framework\TestCase->runBare, CommonsBooking\Tests\View\CalendarTest->setUp, CommonsBooking\Tests\Wordpress\CustomPostTypeTest->setUp, CommonsBooking\Tests\Wordpress\CustomPostTypeTest->setUpBookingCodesTable

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.79%. Comparing base (076ae51) to head (a5bc339).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1610   +/-   ##
=========================================
  Coverage     49.79%   49.79%           
  Complexity     2682     2682           
=========================================
  Files            97       97           
  Lines         10712    10712           
=========================================
  Hits           5334     5334           
  Misses         5378     5378           

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