Add unit tests for improve code coverage.

helpers/parse_image_size.js

@@ -46,7 +46,7 @@ module.exports = function parseImageSize(str, pos, max) {
   // (2) =300x
   // (3) =x200
   code = str.charCodeAt(pos);
-  if (code !== 0x78 /* x */ && (code < 0x30 && code  > 0x39) /* [0-9] */) {
+  if (code !== 0x78 /* x */ && (code < 0x30 || code  > 0x39) /* [0-9] */) {
     return result;
   }
 

test/fixtures/imsize.txt

@@ -258,6 +258,26 @@ Coverage. Image
 .
 <p>![test]( x = 100x200 )</p>
 .
+.
+![test]( x =aaaxbbb )
+.
+<p>![test]( x =aaaxbbb )</p>
+.
+.
+![test](http://this.is.test.jpg =100x200)
+.
+<p><img src="http://this.is.test.jpg" alt="test" width="100" height="200"></p>
+.
+.
+![test](<x =100x200)
+.
+<p>![test](&lt;x =100x200)</p>
+.
+.
+![test](<x> =100x200)
+.
+<p><img src="x" alt="test" width="100" height="200"></p>
+.
 
 Coverage. Link
 .