I'm writing a function to parse .NET composite format strings. Does anyone know where I could find a suite of (valid or invalid) format strings I could use as the basis for unit tests of this function?

The .NET Core tests that I could find seem very limited, only checking if the format is null or if the index arguments are out of range. I am interested in checking other things as well:

• variations in whitespace within the braces
• presence / absence of alignment and item format elements
• brace escaping