add a test to the addons loaded that tries to load all addons then lists addons that fail.

source/tests/bl_load_addons.py

@@ -26,17 +26,46 @@ import addon_utils
 import sys
 import imp
 
+def disable_addons():
+    # first disable all
+    addons = bpy.context.user_preferences.addons
+    for mod_name in list(addons.keys()):
+        addon_utils.disable(mod_name)
+    assert(bool(addons) is False)
+
+
+def test_load_addons():
+    modules = addon_utils.modules({})
+    modules.sort(key=lambda mod: mod.__name__)
+
+    disable_addons()
+
+    addons = bpy.context.user_preferences.addons
+
+    addons_fail = []
+
+    for mod in modules:
+        mod_name = mod.__name__
+        print("\tenabling:", mod_name)
+        addon_utils.enable(mod_name)
+        if mod_name not in addons:
+            addons_fail.append(mod_name)
+    
+    if addons_fail:
+        print("addons failed to load (%d):" % len(addons_fail))
+        for mod_name in addons_fail:
+            print("    %s" % mod_name)
+    else:
+        print("addons all loaded without errors!")
+    print("")
+
 
 def reload_addons(do_reload=True, do_reverse=True):
     modules = addon_utils.modules({})
     modules.sort(key=lambda mod: mod.__name__)
     addons = bpy.context.user_preferences.addons
 
-    # first disable all
-    for mod_name in list(addons.keys()):
-        addon_utils.disable(mod_name)
-
-    assert(bool(addons) is False)
+    disable_addons()
 
     # Run twice each time.
     for i in (0, 1):
@@ -62,6 +91,9 @@ def reload_addons(do_reload=True, do_reverse=True):
 
 
 def main():
+    # first load addons, print a list of all addons that fail
+    test_load_addons()
+    
     reload_addons(do_reload=False, do_reverse=False)
     reload_addons(do_reload=False, do_reverse=True)
     reload_addons(do_reload=True, do_reverse=True)