multipleOf validation fails when the value is fractional

Describe the bug

Given an openAPI spec that contains validation of multipleOf: 0.1 for a double type, there are several valid values for which the validation fails, and therefor the API request is not sent.

To Reproduce

Steps to reproduce the behavior:

1. Use autorest to generate a typescript client with the following type contained
2. Attempt to call the API with a value of 2.0
3. Observe that the validation fails and the command is not sent

       fractionalValue:
          type: number
          format: double
          minimum: 0
          maximum: 100
          multipleOf: 0.1
          example: 0.1

Expected behavior

For a multipleOf value of 0.1, all of the following values (and others) should be valid:

• 0.1
• 0.2
• 1
• 2

Additional context

I believe this may be resolved by changing line 57 of https://github.com/Azure/ms-rest-js/blob/45f89c90414db812e4950185ffe7f9f6becb5664/lib/serializer.ts to use an epsilon value of MultipleOf when the type is double.

This may include false positives that I have not considered. However, for client-side validation false positives are expected, since the client does not have full context, and will rely on server validation in other scenarios.

[sarangan12]

I have sent a note to the Autorest crew abount these validations and based on their input, I will decide on removing the constraints.

[sarangan12]

Removed the constraints check. Closing this issue