Update ToSnakeCase so it wouldn't return "image_u_r_l" for "imageURL"

CHANGELOG.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed RPC server to respect the `KIOTA_CONFIG_PREVIEW` flag.
 - Fixed handling of nested arrays to be handled as `UntypedNode` instances [#4549](https://github.com/microsoft/kiota/issues/4549)
 - Fixed `InvalidOperationException` thrown when serializing IBacked models with no changes present in the additional data in dotnet [microsoftgraph/msgraph-sdk-dotnet#2471](https://github.com/microsoftgraph/msgraph-sdk-dotnet/issues/2471). 
+- Updated conversion to snake case to deal with strigns with multiple uppercase letters in a row for example "imageURL" will be converted to "image_url" and not "image_u_r_l"
 
 ## [1.14.0] - 2024-05-02
 

src/Kiota.Builder/Extensions/StringExtensions.cs

@@ -82,7 +82,7 @@ static int CountNecessaryNewSeparators(ReadOnlySpan<char> span)
             int count = 0;
             for (var i = 1; i < span.Length; i++)
             {
-                if (char.IsUpper(span[i]) && span[i - 1] is not '_' and not '-')
+                if (char.IsUpper(span[i]) && span[i - 1] is not '_' and not '-' && !char.IsUpper(span[i - 1]))
                 {
                     count++;
                 }
@@ -105,7 +105,10 @@ static int CountNecessaryNewSeparators(ReadOnlySpan<char> span)
             }
             else if (char.IsUpper(current))
             {
-                if (nameSpan[i - 1] != '_') span[counter++] = separator;
+                if (nameSpan[i - 1] is not '_' && !char.IsUpper(nameSpan[i - 1]))
+                {
+                    span[counter++] = separator;
+                }
                 span[counter++] = char.ToLowerInvariant(current);
             }
             else

tests/Kiota.Builder.Tests/Extensions/StringExtensionsTests.cs

@@ -75,6 +75,8 @@ public void ToSnakeCase()
         Assert.Equal("microsoft_graph_message_content", "microsoft_Graph_Message_Content".ToSnakeCase());
         Assert.Equal("test_value", "testValue<WithStrippedContent".ToSnakeCase());
         Assert.Equal("test", "test<Value".ToSnakeCase());
+        Assert.Equal("microsoft_website_url", "microsoftWebsiteURL".ToSnakeCase());
+        Assert.Equal("microsoft_website_url", "MICROSOFT_WEBSITE_URL".ToSnakeCase());
     }
     [Fact]
     public void NormalizeNameSpaceName()