From cc4c77f6c789354f1cee30d7369a6f65856f741e Mon Sep 17 00:00:00 2001
From: Jeremy Benoist <jeremy.benoist@gmail.com>
Date: Fri, 21 Aug 2020 10:35:13 +0200
Subject: [PATCH] Fix error when Font aren't available

This can happen (like in many places of `Page.php`) when the retrieved element is missing (and the instance if `ElementMissing`. In that case, we just return an empty array (the default value).
---
 src/Smalot/PdfParser/Page.php  |  4 ++++
 tests/Integration/PageTest.php | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/src/Smalot/PdfParser/Page.php b/src/Smalot/PdfParser/Page.php
index f0b2e2d5..b9d6f684 100644
--- a/src/Smalot/PdfParser/Page.php
+++ b/src/Smalot/PdfParser/Page.php
@@ -64,6 +64,10 @@ public function getFonts()
         $resources = $this->get('Resources');
 
         if (method_exists($resources, 'has') && $resources->has('Font')) {
+            if ($resources->get('Font') instanceof ElementMissing) {
+                return [];
+            }
+
             if ($resources->get('Font') instanceof Header) {
                 $fonts = $resources->get('Font')->getElements();
             } else {
diff --git a/tests/Integration/PageTest.php b/tests/Integration/PageTest.php
index 1247a700..c923eb51 100644
--- a/tests/Integration/PageTest.php
+++ b/tests/Integration/PageTest.php
@@ -32,7 +32,10 @@
 
 namespace Tests\Smalot\PdfParser\Integration;
 
+use Smalot\PdfParser\Document;
+use Smalot\PdfParser\Element\ElementMissing;
 use Smalot\PdfParser\Font;
+use Smalot\PdfParser\Page;
 use Tests\Smalot\PdfParser\TestCase;
 
 class PageTest extends TestCase
@@ -71,6 +74,35 @@ public function testGetFonts()
         $this->assertEquals(0, \count($fonts));
     }
 
+    public function testGetFontsElementMissing()
+    {
+        $headerResources = $this->getMockBuilder('Smalot\PdfParser\Header')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $headerResources->expects($this->once())
+            ->method('has')
+            ->willReturn(true);
+
+        $headerResources->expects($this->once())
+            ->method('get')
+            ->willReturn(new ElementMissing());
+
+        $header = $this->getMockBuilder('Smalot\PdfParser\Header')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $header->expects($this->once())
+            ->method('get')
+            ->willReturn($headerResources);
+
+        $page = new Page(new Document(), $header);
+        $fonts = $page->getFonts();
+
+        $this->assertEmpty($fonts);
+        $this->assertEquals([], $fonts);
+    }
+
     public function testGetFont()
     {
         // Document with text.