Create unit tests to test:

• Exporting RFC 4180 compliant CSV files.
• Importing RFC 4180 compliant CSV files.

Tests should consider the following points:

• Each record is located on a seperate line.
• There maybe an optional header.
• A header may contain spaces and shouldn't be ignored.
• Fields containgin line breaks, double quotes and commas should be enclosed in double quotes.
• If double quotes are used to enclose fields, then a double quote appearing inside a field must be escaped by preceding it with another double quote.