Assertions involving NaN

Ecosystem
1

I use ounit to test the code of my lexer + parser. I have test input which should result in a NaN; I don’t know how to test this because NaN != NaN , so assert_equal will fail :frowning:

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Ian

2

Try Float.is_nan. See OCaml library : Float.

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3

Thanks, that helped.

4

You can also use Float.compare x y = 0 instead of x = y. Float.compare compares NaNs equal and Nan and non-NaN different.

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