From ab20a4ab75b0f1e2f078749abf7686f4a960a31d Mon Sep 17 00:00:00 2001
From: LindaXie <linda.xie@ethisphere.com>
Date: Thu, 31 Aug 2023 10:35:58 -0700
Subject: [PATCH] fix problem where axis cannot be set to zero

---
 .../Writer/PowerPoint2007/PptCharts.php       |  4 +-
 .../Writer/PowerPoint2007/PptChartsTest.php   | 51 +++++++++++++++++++
 2 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/src/PhpPresentation/Writer/PowerPoint2007/PptCharts.php b/src/PhpPresentation/Writer/PowerPoint2007/PptCharts.php
index 4d03776f1..9c8c2251e 100644
--- a/src/PhpPresentation/Writer/PowerPoint2007/PptCharts.php
+++ b/src/PhpPresentation/Writer/PowerPoint2007/PptCharts.php
@@ -2319,13 +2319,13 @@ protected function writeAxis(XMLWriter $objWriter, Chart\Axis $oAxis, string $ty
         $objWriter->writeAttribute('val', $orientation);
         $objWriter->endElement();
 
-        if (null != $oAxis->getMaxBounds()) {
+        if (null !== $oAxis->getMaxBounds()) {
             $objWriter->startElement('c:max');
             $objWriter->writeAttribute('val', $oAxis->getMaxBounds());
             $objWriter->endElement();
         }
 
-        if (null != $oAxis->getMinBounds()) {
+        if (null !== $oAxis->getMinBounds()) {
             $objWriter->startElement('c:min');
             $objWriter->writeAttribute('val', $oAxis->getMinBounds());
             $objWriter->endElement();
diff --git a/tests/PhpPresentation/Tests/Writer/PowerPoint2007/PptChartsTest.php b/tests/PhpPresentation/Tests/Writer/PowerPoint2007/PptChartsTest.php
index aba15710f..221c7f4e4 100644
--- a/tests/PhpPresentation/Tests/Writer/PowerPoint2007/PptChartsTest.php
+++ b/tests/PhpPresentation/Tests/Writer/PowerPoint2007/PptChartsTest.php
@@ -229,6 +229,57 @@ public function testTitleVisibilityFalse(): void
     public function testAxisBounds(): void
     {
         $value = mt_rand(0, 100);
+        $value = 0;
+
+        $oSeries = new Series('Downloads', $this->seriesData);
+        $oSeries->getFill()->setStartColor(new Color('FFAABBCC'));
+        $oLine = new Line();
+        $oLine->addSeries($oSeries);
+        $oShape = $this->oPresentation->getActiveSlide()->createChartShape();
+        $oShape->getPlotArea()->setType($oLine);
+
+        $elementMax = '/c:chartSpace/c:chart/c:plotArea/c:catAx/c:scaling/c:max';
+        $elementMin = '/c:chartSpace/c:chart/c:plotArea/c:catAx/c:scaling/c:min';
+
+        $this->assertZipXmlElementNotExists('ppt/charts/' . $oShape->getIndexedFilename(), $elementMax);
+        $this->assertZipXmlElementNotExists('ppt/charts/' . $oShape->getIndexedFilename(), $elementMin);
+
+        $this->assertIsSchemaECMA376Valid();
+
+        $oShape->getPlotArea()->getAxisX()->setMinBounds($value);
+        $this->resetPresentationFile();
+
+        $this->assertZipXmlElementNotExists('ppt/charts/' . $oShape->getIndexedFilename(), $elementMax);
+        $this->assertZipXmlElementExists('ppt/charts/' . $oShape->getIndexedFilename(), $elementMin);
+        $this->assertZipXmlAttributeEquals('ppt/charts/' . $oShape->getIndexedFilename(), $elementMin, 'val', $value);
+
+        $this->assertIsSchemaECMA376Valid();
+
+        $oShape->getPlotArea()->getAxisX()->setMinBounds(null);
+        $oShape->getPlotArea()->getAxisX()->setMaxBounds($value);
+        $this->resetPresentationFile();
+
+        $this->assertZipXmlElementNotExists('ppt/charts/' . $oShape->getIndexedFilename(), $elementMin);
+        $this->assertZipXmlElementExists('ppt/charts/' . $oShape->getIndexedFilename(), $elementMax);
+        $this->assertZipXmlAttributeEquals('ppt/charts/' . $oShape->getIndexedFilename(), $elementMax, 'val', $value);
+
+        $this->assertIsSchemaECMA376Valid();
+
+        $oShape->getPlotArea()->getAxisX()->setMinBounds($value);
+        $oShape->getPlotArea()->getAxisX()->setMaxBounds($value);
+        $this->resetPresentationFile();
+
+        $this->assertZipXmlElementExists('ppt/charts/' . $oShape->getIndexedFilename(), $elementMin);
+        $this->assertZipXmlAttributeEquals('ppt/charts/' . $oShape->getIndexedFilename(), $elementMin, 'val', $value);
+        $this->assertZipXmlElementExists('ppt/charts/' . $oShape->getIndexedFilename(), $elementMax);
+        $this->assertZipXmlAttributeEquals('ppt/charts/' . $oShape->getIndexedFilename(), $elementMax, 'val', $value);
+
+        $this->assertIsSchemaECMA376Valid();
+    }
+
+    public function testAxisBoundsIfZero(): void
+    {
+        $value = 0;
 
         $oSeries = new Series('Downloads', $this->seriesData);
         $oSeries->getFill()->setStartColor(new Color('FFAABBCC'));