"-0" throw number.unsafe

[zapolnoch]

Context

• node version: 12.6.0
• joi version: 15.1.1
• environment: node
• used with: standalone

What are you trying to achieve or the steps to reproduce ?

const schema = Joi.number()
const result = schema.validate('-0')

Which result you had ?

error type 'number.unsafe'

What did you expect ?

{ error: null, value: 0 }

because:

const schema = Joi.number()
schema.validate('+0') // => { error: null, value: 0 }

[zapolnoch]

I think the problem lies in this line.

parseFloat("-0").toString()		// "0"
internals.normalizeDecimal("-0")	// "-0"

[kanongil]

@hueniverse I'm not a fan of converting the -0 value to 0. It means that the following produces different values:

schema.validate('-0'); // => { value: 0 }
schema.validate(-0); // => { value: -0 }

Also, Joi.number().integer().validate(-0) does not fail as expected.

[hueniverse]

I think all -0 should be 0. It's just stupid. I'll make sure to make it consistent.