Allow parsing of single digit amounts

CHANGELOG.md

@@ -1,3 +1,11 @@
+# Changelog for Money v4.2.1
+
+This is the changelog for Money v4.2.1 released on September 2nd, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr/tags)
+
+### Bug Fixes
+
+* Fixes parsing of money amount that have a single digit amount. Closes #107.  Thanks to @njwest
+
 # Changelog for Money v4.2.0
 
 This is the changelog for Money v4.2.0 released on 21 August, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr/tags)

lib/money.ex

@@ -374,7 +374,7 @@ defmodule Money do
   @grouping_chars ",،٫、︐︑﹐﹑，､"
   @decimal_chars ".․。︒﹒．｡"
   @currency "[^0-9#{@grouping_chars}#{@decimal_chars}]+"
-  @amount "[0-9][0-9#{@grouping_chars}#{@decimal_chars}]+"
+  @amount "[0-9][0-9#{@grouping_chars}#{@decimal_chars}]*"
   @regex Regex.compile!("^(?<cb>#{@currency})?(?<amount>#{@amount})?(?<ca>#{@currency})?$", "u")
 
   @doc false

mix.exs

@@ -1,7 +1,7 @@
 defmodule Money.Mixfile do
   use Mix.Project
 
-  @version "4.2.0"
+  @version "4.2.1"
 
   def project do
     [

test/money_parse_test.exs

@@ -10,6 +10,12 @@ defmodule MoneyTest.Parse do
       assert Money.parse("USD 100.00") == Money.new(:USD, "100.00")
     end
 
+    test "parses with a single digit amount" do
+      assert Money.parse("USD 1") == Money.new(:USD, 1)
+      assert Money.parse("USD1") == Money.new(:USD, 1)
+      assert Money.parse("USD9") == Money.new(:USD, 9)
+    end
+
     test "parses with currency code out back" do
       assert Money.parse("100 USD") == Money.new(:USD, 100)
       assert Money.parse("100USD") == Money.new(:USD, 100)