148 format validation vulnerability #179
Merged
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Fixes #148
Fixes regular expression validation of phone number.
Our previous regular expression validation of the phone number has a security vulnerability. A phone number like "123-456-7890 malicious_code_here" would have been marked as valid. This fix removes that vulnerability. By adding in anchors to the regex check: (/\A\d{3}-\d{3}-\d{4}\z/), we ensure that the string is exactly a phone number in the format 111-111-1111 and nothing else.
Rspec: also included a happy path and more edge case checks for phone number validation.