Length checks added, validations added

test/iban_ex_test.exs

@@ -1,6 +1,7 @@
 defmodule IbanExTest do
   alias IbanEx.{Country, Iban, Parser}
   use ExUnit.Case, async: true
+  doctest_file "README.md"
   doctest IbanEx.Country.AT
   doctest IbanEx.Country.BE
   doctest IbanEx.Country.BG

test/iban_ex_validator_test.exs

@@ -0,0 +1,18 @@
+defmodule IbanExValidatorTest do
+  alias IbanEx.{Validator}
+  use ExUnit.Case, async: true
+
+  test "check IBANs length" do
+    cases = [
+      {"FG2112345CC6000007", {:error, :unsupported_country_code}},
+      {"UK2112345CC6000007", {:error, :unsupported_country_code}},
+      {"FI2112345CC6000007", :ok},
+      {"FI2112345CC6000007a", {:error, :length_to_long}},
+      {"FI2112345CC600007", {:error, :length_to_short}}
+    ]
+
+    Enum.all?(cases, fn {iban, result} ->
+      assert Validator.check_iban_length(iban) == result
+    end)
+  end
+end