Improve code coverage for client-side tests

[ungoldman]

Current status:

File	% Stmts	% Branches	% Funcs	% Lines
js/	60	32.35	66.2	59.92
app.js	28.57	100	50	28.57
controllers.js	54.84	7.14	47.06	54.84
directives.js	33.73	11.54	45	33.73
filters.js	91.43	92.86	88.24	93.75
services.js	90.57	35.71	93.33	90.57
---------------------	-----------	-----------	-----------	-----------
All files	60	32.35	66.2	59.92

We need to make those numbers bigger!