From 3217ffce06abf6b2afa464089e2da8d6bdb2a195 Mon Sep 17 00:00:00 2001
From: Trevor Pilley <TrevorPilley@users.noreply.github.com>
Date: Wed, 27 Sep 2023 19:35:58 +0000
Subject: [PATCH] Formatter

---
 src/PhoneNumbers/CountryInfo_NorthAmerica.cs  |  1 +
 .../MXPhoneNumberFormatProvider.cs            | 20 +++++++++++++++++++
 .../CountryInfo_NorthAmerica_Tests.cs         |  2 +-
 ...PhoneNumber_ToString_NorthAmerica_Tests.cs |  7 +++++++
 4 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 src/PhoneNumbers/Formatters/FormatProviders/MXPhoneNumberFormatProvider.cs

diff --git a/src/PhoneNumbers/CountryInfo_NorthAmerica.cs b/src/PhoneNumbers/CountryInfo_NorthAmerica.cs
index de18aa3ff..827b46fbd 100644
--- a/src/PhoneNumbers/CountryInfo_NorthAmerica.cs
+++ b/src/PhoneNumbers/CountryInfo_NorthAmerica.cs
@@ -192,6 +192,7 @@ public partial class CountryInfo
     {
         CallingCode = "52",
         Continent = NorthAmerica,
+        FormatProvider = MXPhoneNumberFormatProvider.Instance,
         Iso3166Code = "MX",
         Name = "Mexico",
         NdcLengths = new ReadOnlyCollection<int>(new[] { 2 }),
diff --git a/src/PhoneNumbers/Formatters/FormatProviders/MXPhoneNumberFormatProvider.cs b/src/PhoneNumbers/Formatters/FormatProviders/MXPhoneNumberFormatProvider.cs
new file mode 100644
index 000000000..b42ccbbaf
--- /dev/null
+++ b/src/PhoneNumbers/Formatters/FormatProviders/MXPhoneNumberFormatProvider.cs
@@ -0,0 +1,20 @@
+namespace PhoneNumbers.Formatters.FormatProviders;
+
+/// <summary>
+/// A <see cref="PhoneNumberFormatProvider"/> for Mexico numbers.
+/// </summary>
+internal sealed class MXPhoneNumberFormatProvider : ComplexPhoneNumberFormatProvider
+{
+    private MXPhoneNumberFormatProvider()
+    {
+    }
+
+    internal static PhoneNumberFormatProvider Instance { get; } = new MXPhoneNumberFormatProvider();
+
+    protected override string ProvideFormat(PhoneNumber phoneNumber, bool international) =>
+        phoneNumber.NationalSignificantNumber!.Length switch
+        {
+            10 => "## #### ####",
+            _ => base.ProvideFormat(phoneNumber, international),
+        };
+}
diff --git a/test/PhoneNumbers.Tests/CountryInfo_NorthAmerica_Tests.cs b/test/PhoneNumbers.Tests/CountryInfo_NorthAmerica_Tests.cs
index 897373e7b..50c12d77e 100644
--- a/test/PhoneNumbers.Tests/CountryInfo_NorthAmerica_Tests.cs
+++ b/test/PhoneNumbers.Tests/CountryInfo_NorthAmerica_Tests.cs
@@ -234,7 +234,7 @@ public void CountryInfo_Mexico()
         Assert.False(countryInfo.AllowsLocalGeographicDialling);
         Assert.Equal("52", countryInfo.CallingCode);
         Assert.Equal(CountryInfo.NorthAmerica, countryInfo.Continent);
-        Assert.IsType<ComplexPhoneNumberFormatProvider>(countryInfo.FormatProvider);
+        Assert.IsType<MXPhoneNumberFormatProvider>(countryInfo.FormatProvider);
         Assert.False(countryInfo.IsEuropeanUnionMember);
         Assert.Equal("MX", countryInfo.Iso3166Code);
         Assert.Equal("Mexico", countryInfo.Name);
diff --git a/test/PhoneNumbers.Tests/PhoneNumber_ToString_NorthAmerica_Tests.cs b/test/PhoneNumbers.Tests/PhoneNumber_ToString_NorthAmerica_Tests.cs
index 28824ae29..88ad055b9 100644
--- a/test/PhoneNumbers.Tests/PhoneNumber_ToString_NorthAmerica_Tests.cs
+++ b/test/PhoneNumbers.Tests/PhoneNumber_ToString_NorthAmerica_Tests.cs
@@ -79,6 +79,13 @@ public void Grenada_Numbers(string input, string format, string expected) =>
     public void Jamaica_Numbers(string input, string format, string expected) =>
         Assert.Equal(expected, PhoneNumber.Parse(input).ToString(format));
 
+    [Theory]
+    [InlineData("+525550154158", "E.123", "+52 55 5015 4158")]
+    [InlineData("+525550154158", "N", "55 5015 4158")]
+    [InlineData("+525550154158", "RFC3966", "tel:+52-55-5015-4158")]
+    public void Mexico_Numbers(string input, string format, string expected) =>
+        Assert.Equal(expected, PhoneNumber.Parse(input).ToString(format));
+
     [Theory]
     [InlineData("+16644913789", "E.123", "+1 664-491-3789")]
     [InlineData("+16644913789", "N", "(664) 491-3789")]