Add test for svg conversion

test/ebook.js

@@ -12,4 +12,10 @@ describe('eBook Generator', function () {
             assert(fs.existsSync(path.join(output, "SUMMARY.html")));
         }, done);
     });
+
+    it('should correctly convert svg images to png', function(done) {
+        testGeneration(books[4], "ebook", function(output) {
+            assert(fs.existsSync(path.join(output, "test.png")));
+        }, done);
+    });
 });

test/fixtures/test4/README.md

@@ -1,3 +1,5 @@
 # Other Title
 
 A description
+
+![test image to be converted](./test.svg)

test/fixtures/test4/test.svg

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Tiny//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-tiny.dtd">
+<svg version="1.1" baseProfile="tiny" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="svg-root" width="100%" height="100%" viewBox="0 0 480 360">
+	<title id="test-title">basic SVG tiny doc</title>
+	<g id="test-body-content">
+		<text font-family="Arial" font-size="14" text-anchor="middle" x="225" y="25">hello world</text>
+	</g>
+	<text id="revision" x="10" y="340" font-size="40" stroke="none" fill="black">Revision: 1.1</text>
+	<rect id="test-frame" x="1" y="1" width="478" height="358" fill="none" stroke="#000000"/>
+</svg>
+