From 9c380e51a52e2d791767c3a488256619a0c57cd8 Mon Sep 17 00:00:00 2001
From: Noel Peden <noel@peden.biz>
Date: Mon, 24 Aug 2020 15:34:30 -0700
Subject: Explosion explosion fixed - issue 58

---
 lib/axlsx/drawing/pie_series.rb | 2 +-
 test/drawing/tc_pie_series.rb   | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/axlsx/drawing/pie_series.rb b/lib/axlsx/drawing/pie_series.rb
index 31a6b265..fd18ed6a 100644
--- a/lib/axlsx/drawing/pie_series.rb
+++ b/lib/axlsx/drawing/pie_series.rb
@@ -47,7 +47,7 @@ module Axlsx
     # @return [String]
     def to_xml_string(str = '')
       super(str) do
-        str << '<c:explosion val="' + @explosion + '"/>' unless @explosion.nil?
+        str << '<c:explosion val="' + @explosion.to_s + '"/>' unless @explosion.nil?
         colors.each_with_index do |c, index|
           str << '<c:dPt>'
           str << ('<c:idx val="' << index.to_s << '"/>')
diff --git a/test/drawing/tc_pie_series.rb b/test/drawing/tc_pie_series.rb
index 70abb602..18e4bbd0 100644
--- a/test/drawing/tc_pie_series.rb
+++ b/test/drawing/tc_pie_series.rb
@@ -20,12 +20,13 @@ class TestPieSeries < Test::Unit::TestCase
     assert_raise(ArgumentError, "require valid explosion") { @series.explosion = :lots }
     assert_nothing_raised("allow valid explosion") { @series.explosion = 20 }
     assert(@series.explosion == 20)
+    # issue 58 - explosion caused to_xml_string to fail - now tested
+    assert_nothing_raised("allow to_xml_string") { @series.to_xml_string }
   end
 
   def test_to_xml_string
     doc = Nokogiri::XML(@series.to_xml_string)
     assert(doc.xpath("//srgbClr[@val='#{@series.colors[0]}']"))
-
   end
   #TODO test unique serialization parts
 
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