Add regression test for #1235

This is literally all you have to do to break this function... just have
one single other group in your document.

diff --git a/spec/spec/elements/Element.js b/spec/spec/elements/Element.js
index 38b862f3272eab55109f2aeab566eefc848f423c..70c3a52ff0a892a7333b4e404a288d7e85a3b230 100644 (file)
--- a/spec/spec/elements/Element.js
+++ b/spec/spec/elements/Element.js
@@ -165,6 +165,7 @@ describe('Element.js', function () {
   describe('parents()', () => {
     it('returns array of parents until the passed element or root svg', () => {
       const canvas = SVG().addTo(container)
+      const groupA = canvas.group().addClass('test')
       const group1 = canvas.group().addClass('test')
       const group2 = group1.group()
       const group3 = group2.group()