Successor to PR #3523. There are 494 single-line changes (`public function provider` to `public static function provider`) in this PR. None of these were made manually; they were all created with the following script (adapted from
https://stackoverflow.com/questions/25909820/how-to-recursively-iterate-through-files-in-php):
```php
$dir = 'C:/git/unit10prep2/tests/PhpSpreadsheetTests';
$it = new RecursiveDirectoryIterator($dir);
// Loop through files
foreach(new RecursiveIteratorIterator($it) as $file) {
if ($file->getExtension() === 'php') {
$contents = file_get_contents($file);
$new = preg_replace('/public function (\\w*)([Pp])rovider/', 'public static function $1$2rovider', $contents);
if ($new !== $contents) {
echo "changing $file\n";
file_put_contents($file, $new);
}
}
}
```
After this PR, there will be one more, with a small number of test changes, and enabling PhpUnit 10 for Php 8.1+.
* Change Additional Statistical Tests to Use Spreadsheet Context
With an earlier change, I made all but 18 Statistical tests run in spreadsheet context. This PR changes 12 of those 18. The remaining 6 usually return array results, so it is a tougher task to handle them. I will continue to think on it.
AVERAGEIF, AVERAGEIFS, and COUNTBLANK are changed to throw an Exception when a range is specified as a literal. They previously accepted array (enclosed in braces) literals, and bumbled along till they threw an error for non-array literals. Throwing an exception appears to be analogous to how Excel operates, rather than something more friendly like a VALUE error. There may be other functions which require similar treatment.
There also remains a TODO for COUNTIFS, and possibly other functions. It appears that PhpSpreadsheet counts booleans for both integer and string compares and probably shouldn't. Again, this is a problem for another day.
* Scrutinizer
Fix one problem.
* Scrutinizer Ignores Its Own Suggested Remedy
Try another approach.
* Fix Unintential Deprecated Calls in Tests - STATISTICAL
I think it's best to install these before PR #3166. There are no changes to source code, only to doc-blocks and to test members which continue to inadvertently use calls to deprecated functions.
* Missed One Deprecation
Fix it now.
* Run Tests in Spreadsheet Context
This is quite a bit more difficult for Statistical than for the other Calculation categories. This is partly because of the use of multi-dimensional matrices, and also because some arguments are interpreted differently when they come from a cell rather than entered directly in a formula. This push leaves 18 out of 89 test members unchanged, except that they are marked with a TODO to show that the work isn't finished. I will not revisit them as part of this PR, but probably will take a look in a subsequent ticket.
- Refactoring of the Statistical Conditional functions (`AVERAGEIF()`, `AVERAGEIFS()`, `COUNTIF()`, `COUNTIFS()`, `MAXIFS()` and `MINIFS()` to use the new Database functions codebase.
- Extended unit testing
- Fix handling for null values
- Fixes to wildcard text searches
There's still scope for further improvements to memory usage and performance; but for now the code is stable with all unit tests passing