Facilitate Migrating From IReader to IReader2 If Needed

Probably shouldn't be needed, but just in case.

tests/PhpSpreadsheetTests/CustomReader2.php

@@ -0,0 +1,140 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests;
+
+use PhpOffice\PhpSpreadsheet\Reader\DefaultReadFilter;
+use PhpOffice\PhpSpreadsheet\Reader\EmptyWorksheetInfo;
+use PhpOffice\PhpSpreadsheet\Reader\IReader2;
+use PhpOffice\PhpSpreadsheet\Reader\IReadFilter;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+
+// Used in IOFactoryRegister tests
+class CustomReader2 extends EmptyWorksheetInfo implements IReader2
+{
+    private bool $readDataOnly = true;
+
+    private bool $readEmptyCells = true;
+
+    private bool $includeCharts = true;
+
+    private bool $allowExternalImages = true;
+
+    private bool $createBlankSheetIfNoneRead = true;
+
+    /** @var string[] */
+    private array $loadSheetsOnly = [];
+
+    private IReadFilter $readFilter;
+
+    public function __construct()
+    {
+        $this->readFilter = new DefaultReadFilter();
+    }
+
+    public function canRead(string $filename): bool
+    {
+        return true;
+    }
+
+    public function getReadDataOnly(): bool
+    {
+        return $this->readDataOnly;
+    }
+
+    public function setReadDataOnly(bool $readDataOnly): self
+    {
+        $this->readDataOnly = $readDataOnly;
+
+        return $this;
+    }
+
+    public function getReadEmptyCells(): bool
+    {
+        return $this->readEmptyCells;
+    }
+
+    public function setReadEmptyCells(bool $readEmptyCells): self
+    {
+        $this->readEmptyCells = $readEmptyCells;
+
+        return $this;
+    }
+
+    public function getIncludeCharts(): bool
+    {
+        return $this->includeCharts;
+    }
+
+    public function setIncludeCharts(bool $includeCharts): self
+    {
+        $this->includeCharts = $includeCharts;
+
+        return $this;
+    }
+
+    /** @return string[] */
+    public function getLoadSheetsOnly(): array
+    {
+        return $this->loadSheetsOnly;
+    }
+
+    /** @param null|string|string[] $loadSheetsOnly */
+    public function setLoadSheetsOnly(string|array|null $loadSheetsOnly): self
+    {
+        if (is_array($loadSheetsOnly)) {
+            $this->loadSheetsOnly = $loadSheetsOnly;
+        }
+
+        return $this;
+    }
+
+    public function setLoadAllSheets(): self
+    {
+        $this->loadSheetsOnly = [];
+
+        return $this;
+    }
+
+    public function setReadFilter(IReadFilter $readFilter): self
+    {
+        $this->readFilter = $readFilter;
+
+        return $this;
+    }
+
+    public function getReadFilter(): IReadFilter
+    {
+        return $this->readFilter;
+    }
+
+    public function getAllowExternalImages(): bool
+    {
+        return $this->allowExternalImages;
+    }
+
+    public function setAllowExternalImages(bool $allowExternalImages): self
+    {
+        $this->allowExternalImages = $allowExternalImages;
+
+        return $this;
+    }
+
+    public function getCreateBlankSheetIfNoneRead(): bool
+    {
+        return $this->createBlankSheetIfNoneRead;
+    }
+
+    public function setCreateBlankSheetIfNoneRead(bool $createBlankSheetIfNoneRead): self
+    {
+        $this->createBlankSheetIfNoneRead = $createBlankSheetIfNoneRead;
+
+        return $this;
+    }
+
+    public function load(string $filename, int $flags = 0): Spreadsheet
+    {
+        return new Spreadsheet();
+    }
+}

tests/PhpSpreadsheetTests/IOFactoryRegisterTest.php

@@ -54,6 +54,14 @@ class IOFactoryRegisterTest extends TestCase
         IOFactory::registerReader('Custom', CustomReaderNot2::class); // @phpstan-ignore-line
     }
 
+    public function testRegisterReader2EmptyListWorksheet(): void
+    {
+        IOFactory::registerReader('Custom', CustomReader2::class);
+        $reader = new CustomReader2();
+        self::assertSame([], $reader->listWorksheetInfo('x'));
+        self::assertSame([], $reader->listWorksheetNames('x'));
+    }
+
     public static function testRegisterCustomReader(): void
     {
         IOFactory::registerReader(IOFactory::READER_XLSX, CustomReader::class);