expect(floatNumber).toBeNear(number, epsilon)

Compare a given value numerically to be in the range of number-epsilon and number+epsilon. Thus epsilon specifies the maximum tolerance the compared value is allowed to vary.

Example

expect(4.23223432434).toBeNear(4, 0.25); // success
expect(4.23223432434).toBeNear(4, 0.2); // failure

Implementation

Could internally use the “toBeWithinRange” matcher, but the above is much nicer to write if you’re not targeting a specific range, but just a value and allow some wobbling.

[jacobwardio]

https://github.com/JamieMason/Jasmine-Matchers/pull/68 adds the toBeNear() matcher.

[JamieMason]

Thanks @Nolanus, do I understand correctly that

expect(22).toBeNear(20, 2);

is equivalent to

expect(22).toBeWithinRange(18, 22);