1	quoted empty string		should be empty string
2	no value between separators	\N	should be null
3	quoted blanks	    	should be blanks
4	unquoted blanks	\N	should be null
5	unquoted string	no quote	should be 'no quote'
6	quoted separator	a,b,c	should be 'a,b,c'
7	trim extra blanks	test string	should be 'test string'
