A CSV file for validating a CSV parser - q.v. https://gist.github.com/pkoppstein/e962076c25e75af201e958bdff92fdbf

test.csv

1
"2"
 "3"
 "4"
"5", "a" 
"""6"""
"""7""","a"
8,b,c
9,"",c
10,,c

11,,
12,"b c","bSPACEc"
13,"C1","C2","C3","C4","C5"
14,"","""",blank-comma-quote
15,"  ",two-spaces
"16"," ","single space followed by embedded,commas"
17, "split
this
line","And
this
too"
18,"next record has both embedded newline and dquote"
"a
""b""","c"
19,"esctab","\t",a
20,"embedded tab","	",d
21,"foo\\nbar"
22,"b,c\
d"
100,""this line is invalid and should result in an error condition and/or STDERR message"