resolves asciidoctor#465 properly handle absolute image paths

CHANGELOG.adoc

@@ -10,6 +10,7 @@ For a detailed view of what has changed, refer to the {uri-repo}/commits/master[
 * fix crash when running in environments with non-Unicode locale (#475)
 * update Font Awesome Solid to 6.6.0
 * add support for https://docs.asciidoctor.org/asciidoctor/latest/convert/templates/[Converter Templates] (#487)
+* properly handle absolute image paths (#465)
 
 == 2.1.3 (2024-05-12) - @slonopotamus
 

spec/fixtures/image-with-abspath/book.adoc

@@ -0,0 +1,4 @@
+= Image with absolute path
+:imagesdir: {docdir}
+
+image::./circle.svg[]

spec/image_spec.rb

@@ -30,6 +30,15 @@
     expect(book).to have_item_with_href('imagez/wolpertinger.jpg')
   end
 
+  # Test for https://github.com/asciidoctor/asciidoctor-epub3/issues/465
+  it 'supports absolute image paths' do
+    book, out_file = to_epub fixture_file('image-with-abspath/book.adoc')
+    out_dir = out_file.dirname
+
+    expect(out_dir.join('circle.svg')).to exist
+    expect(book).to have_item_with_href('circle.svg')
+  end
+
   it 'does not duplicate images in manifest' do
     book, = to_epub fixture_file('inline-image/book.adoc')
     expect(book.items.keys.select { |k| k.include? 'wolpertinger' }.size).to eq(1)