# CcValidation
[](https://travis-ci.org/mtchavez/ex_cc_validation)
Credit Card format validation
## Installation
If [available in Hex](https://hex.pm/docs/publish), the package can be installed
by adding `cc_validation` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[{:cc_validation, "~> 0.1.0"}]
end
```
## Usage
### Validate a card number
Valid credit card
```elixir
iex> CcValidation.validate("4716892095589823")
{:ok, true}
````
Invalid credit card
```elixir
iex> CcValidation.validate("4024007106963124")
{:error, false}
````
Test card returns false
```elixir
iex> CcValidation.validate("4111111111111111")
{:error, false}
````
### Validate test card numbers when check_test_numbers is true
A valid test card
```elixir
iex> CcValidation.validate("4111111111111111", true)
{:ok, true, test_number: true}
````
An invalid test card
```elixir
iex> CcValidation.validate("4212121212121212", true)
{:error, false, test_number: false}
````
A valid card when checking for test numbers just passes through
to the validate function but will also return that it is not
a test card
```elixir
iex> CcValidation.validate("4716892095589823", true)
{:ok, true, test_number: false}
````
### Card numbers that are of length less than 13 or greater than 19 are invalid.
```elixir
iex> CcValidation.validate("123")
{:error, false}
iex> CcValidation.validate("12345678901234567890")
{:error, false}
````
## Tests
Tests can be ran with `mix` by running `mix test`
## Documentation
Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
be found at [https://hexdocs.pm/cc_validation](https://hexdocs.pm/cc_validation).
