ENH: reincarnate the paranoid test of a json tuned up with regular expressions

Fixes #104

Author: yarikoptic

heudiconv/utils.py

@@ -226,9 +226,16 @@ def json_dumps_pretty(j, indent=2, sort_keys=True):
     js_ = re.sub('  *("?[-+.0-9e]+"?)[ \n]*', r' \1', js_)
     # no spaces after [
     js_ = re.sub('\[ ', '[', js_)
-    j_ = json.loads(js_)
-    # Removed assert as it does not do any floating point comparison
-    #assert(j == j_)
+    # the load from the original dump and reload from tuned up
+    # version should result in identical values since no value
+    # must be changed, just formatting.
+    j_just_reloaded = json.loads(js)
+    j_tuned = json.loads(js_)
+
+    assert j_just_reloaded == j_tuned, \
+       "Values differed when they should have not. "\
+       "Report to the heudiconv developers"
+
     return js_
 
 
@@ -402,4 +409,4 @@ def clear_temp_dicoms(item_dicoms):
 
 def file_md5sum(filename):
     with open(filename, 'rb') as f:
-        return hashlib.md5(f.read()).hexdigest()
+        return hashlib.md5(f.read()).hexdigest()