From ce7863570a99b5d44c3be7c24333a7db8ac672ec Mon Sep 17 00:00:00 2001
From: oleibman <eclipsechasers2@yahoo.com>
Date: Thu, 10 Dec 2020 09:01:08 -0800
Subject: [PATCH] Fix for 1735 (Incorrect activeSheetIndex after
 RemoveSheetByIndex) (#1743)

This is a fix for issue #1735.
It adds tests for this situation, and similar situations involving
adding new sheets and accessing existing ones.
Coverage for Spreadsheet.php increases from 69% to 75% as a result.
---
 src/PhpSpreadsheet/Spreadsheet.php            |   2 +-
 tests/PhpSpreadsheetTests/SpreadsheetTest.php | 143 +++++++++++++++++-
 2 files changed, 143 insertions(+), 2 deletions(-)

diff --git a/src/PhpSpreadsheet/Spreadsheet.php b/src/PhpSpreadsheet/Spreadsheet.php
index 19c11526..c8e8f72c 100644
--- a/src/PhpSpreadsheet/Spreadsheet.php
+++ b/src/PhpSpreadsheet/Spreadsheet.php
@@ -665,7 +665,7 @@ class Spreadsheet
         // Adjust active sheet index if necessary
         if (
             ($this->activeSheetIndex >= $pIndex) &&
-            ($pIndex > count($this->workSheetCollection) - 1)
+            ($this->activeSheetIndex > 0 || $numSheets <= 1)
         ) {
             --$this->activeSheetIndex;
         }
diff --git a/tests/PhpSpreadsheetTests/SpreadsheetTest.php b/tests/PhpSpreadsheetTests/SpreadsheetTest.php
index 05fbe1b5..129bea7c 100644
--- a/tests/PhpSpreadsheetTests/SpreadsheetTest.php
+++ b/tests/PhpSpreadsheetTests/SpreadsheetTest.php
@@ -51,6 +51,147 @@ class SpreadsheetTest extends TestCase
      */
     public function testGetSheetByName($index, $sheetName): void
     {
-        self::assertEquals($this->object->getSheet($index), $this->object->getSheetByName($sheetName));
+        self::assertSame($this->object->getSheet($index), $this->object->getSheetByName($sheetName));
+    }
+
+    public function testAddSheetDuplicateTitle(): void
+    {
+        $this->expectException(\PhpOffice\PhpSpreadsheet\Exception::class);
+        $sheet = new Worksheet();
+        $sheet->setTitle('someSheet2');
+        $this->object->addSheet($sheet);
+    }
+
+    public function testAddSheetNoAdjustActive(): void
+    {
+        $this->object->setActiveSheetIndex(2);
+        self::assertEquals(2, $this->object->getActiveSheetIndex());
+        $sheet = new Worksheet();
+        $sheet->setTitle('someSheet4');
+        $this->object->addSheet($sheet);
+        self::assertEquals(2, $this->object->getActiveSheetIndex());
+    }
+
+    public function testAddSheetAdjustActive(): void
+    {
+        $this->object->setActiveSheetIndex(2);
+        self::assertEquals(2, $this->object->getActiveSheetIndex());
+        $sheet = new Worksheet();
+        $sheet->setTitle('someSheet0');
+        $this->object->addSheet($sheet, 0);
+        self::assertEquals(3, $this->object->getActiveSheetIndex());
+    }
+
+    public function testRemoveSheetIndexTooHigh(): void
+    {
+        $this->expectException(\PhpOffice\PhpSpreadsheet\Exception::class);
+        $this->object->removeSheetByIndex(4);
+    }
+
+    public function testRemoveSheetNoAdjustActive(): void
+    {
+        $this->object->setActiveSheetIndex(1);
+        self::assertEquals(1, $this->object->getActiveSheetIndex());
+        $this->object->removeSheetByIndex(2);
+        self::assertEquals(1, $this->object->getActiveSheetIndex());
+    }
+
+    public function testRemoveSheetAdjustActive(): void
+    {
+        $this->object->setActiveSheetIndex(2);
+        self::assertEquals(2, $this->object->getActiveSheetIndex());
+        $this->object->removeSheetByIndex(1);
+        self::assertEquals(1, $this->object->getActiveSheetIndex());
+    }
+
+    public function testGetSheetIndexTooHigh(): void
+    {
+        $this->expectException(\PhpOffice\PhpSpreadsheet\Exception::class);
+        $this->object->getSheet(4);
+    }
+
+    public function testGetIndexNonExistent(): void
+    {
+        $this->expectException(\PhpOffice\PhpSpreadsheet\Exception::class);
+        $sheet = new Worksheet();
+        $sheet->setTitle('someSheet4');
+        $this->object->getIndex($sheet);
+    }
+
+    public function testSetIndexByName(): void
+    {
+        $this->object->setIndexByName('someSheet1', 1);
+        self::assertEquals('someSheet2', $this->object->getSheet(0)->getTitle());
+        self::assertEquals('someSheet1', $this->object->getSheet(1)->getTitle());
+        self::assertEquals('someSheet 3', $this->object->getSheet(2)->getTitle());
+    }
+
+    public function testRemoveAllSheets(): void
+    {
+        $this->object->setActiveSheetIndex(2);
+        self::assertEquals(2, $this->object->getActiveSheetIndex());
+        $this->object->removeSheetByIndex(0);
+        self::assertEquals(1, $this->object->getActiveSheetIndex());
+        $this->object->removeSheetByIndex(0);
+        self::assertEquals(0, $this->object->getActiveSheetIndex());
+        $this->object->removeSheetByIndex(0);
+        self::assertEquals(-1, $this->object->getActiveSheetIndex());
+        $sheet = new Worksheet();
+        $sheet->setTitle('someSheet4');
+        $this->object->addSheet($sheet);
+        self::assertEquals(0, $this->object->getActiveSheetIndex());
+    }
+
+    public function testBug1735(): void
+    {
+        $spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
+        $spreadsheet->createSheet()->setTitle('addedsheet');
+        $spreadsheet->setActiveSheetIndex(1);
+        $spreadsheet->removeSheetByIndex(0);
+        $sheet = $spreadsheet->getActiveSheet();
+        self::assertEquals('addedsheet', $sheet->getTitle());
+    }
+
+    public function testSetActiveSheetIndexTooHigh(): void
+    {
+        $this->expectException(\PhpOffice\PhpSpreadsheet\Exception::class);
+        $this->object->setActiveSheetIndex(4);
+    }
+
+    public function testSetActiveSheetNoSuchName(): void
+    {
+        $this->expectException(\PhpOffice\PhpSpreadsheet\Exception::class);
+        $this->object->setActiveSheetIndexByName('unknown');
+    }
+
+    public function testAddExternal(): void
+    {
+        $spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
+        $sheet = $spreadsheet->createSheet()->setTitle('someSheet19');
+        $sheet->getCell('A1')->setValue(1);
+        $sheet->getCell('A1')->getStyle()->getFont()->setBold(true);
+        $sheet->getCell('B1')->getStyle()->getFont()->setSuperscript(true);
+        $sheet->getCell('C1')->getStyle()->getFont()->setSubscript(true);
+        self::assertCount(4, $spreadsheet->getCellXfCollection());
+        self::assertEquals(1, $sheet->getCell('A1')->getXfIndex());
+        $this->object->getActiveSheet()->getCell('A1')->getStyle()->getFont()->setBold(true);
+        self::assertCount(2, $this->object->getCellXfCollection());
+        $sheet3 = $this->object->addExternalSheet($sheet);
+        self::assertCount(6, $this->object->getCellXfCollection());
+        self::assertEquals('someSheet19', $sheet3->getTitle());
+        self::assertEquals(1, $sheet3->getCell('A1')->getValue());
+        self::assertTrue($sheet3->getCell('A1')->getStyle()->getFont()->getBold());
+        // Prove Xf index changed although style is same.
+        self::assertEquals(3, $sheet3->getCell('A1')->getXfIndex());
+    }
+
+    public function testAddExternalDuplicateName(): void
+    {
+        $this->expectException(\PhpOffice\PhpSpreadsheet\Exception::class);
+        $spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
+        $sheet = $spreadsheet->createSheet()->setTitle('someSheet1');
+        $sheet->getCell('A1')->setValue(1);
+        $sheet->getCell('A1')->getStyle()->getFont()->setBold(true);
+        $this->object->addExternalSheet($sheet);
     }
 }