Add error handling, improved path logic, and tests for settings file generation

[Copilot]

Description:

Addresses code review feedback from PR #859 by hardening the settings file generation feature with proper error handling, fixing edge cases in path determination, and adding comprehensive test coverage.

Changes

Error Handling

• Wrapped file system operations in try-catch with specific exception types (IOException, UnauthorizedAccessException, SecurityException, NotSupportedException)
• Throws descriptive InvalidOperationException with inner exception when settings file write fails

Path Determination Logic

• Fixed DetermineSettingsFilePath to handle file paths with extensions in multi-file mode
• Added Path.HasExtension check to properly extract directory from file paths
• Ensures consistent .refitter file placement across single-file and multi-file generation modes

Test Coverage

• Added SettingsFileGenerationTests with 5 test methods covering:
  • Settings serialization/deserialization
  • Directory creation
  • Filesystem error handling
  • Path logic for file extensions in multi-file scenarios

Documentation

• Updated misleading comment to accurately describe path determination behavior

Example OpenAPI Specifications:

openapi: '3.0.0'
info:
  version: 'v1'
  title: 'Test API'
servers:
  - url: 'https://api.example.com'
paths:
  /test:
    get:
      responses:
        '200':
          description: 'Success'

Example generated Refit interface

[Headers("Accept: application/json")]
public partial interface ITestApi
{
    [Get("/test")]
    Task<IApiResponse> GetTest();
}

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• developers.intellihr.io
  • Triggering command: /home/REDACTED/work/refitter/refitter/src/Refitter.Tests/bin/Release/net8.0/Refitter.Tests /home/REDACTED/work/refitter/refitter/src/Refitter.Tests/bin/Release/net8.0/Refitter.Tests --server dotnettestcli --dotnet-test-pipe /tmp/5ce73541d0804fe5a2448d0cbba0fc76 (dns block)
• http://crl3.digicert.com:443/NETFoundationProjectsCodeSigningCA.crl
  • Triggering command: /usr/bin/dotnet dotnet build /home/REDACTED/work/refitter/refitter/src/Refitter.Tests/bin/Release/net8.0/73b63245f81c4588bdc968c4d08dda5e/Project.csproj (http block)
• petstore.swagger.io
  • Triggering command: /home/REDACTED/work/refitter/refitter/src/Refitter.Tests/bin/Release/net8.0/Refitter.Tests /home/REDACTED/work/refitter/refitter/src/Refitter.Tests/bin/Release/net8.0/Refitter.Tests --server dotnettestcli --dotnet-test-pipe /tmp/5ce73541d0804fe5a2448d0cbba0fc76 (dns block)
• petstore3.swagger.io
  • Triggering command: /home/REDACTED/work/refitter/refitter/src/Refitter.Tests/bin/Release/net8.0/Refitter.Tests /home/REDACTED/work/refitter/refitter/src/Refitter.Tests/bin/Release/net8.0/Refitter.Tests --server dotnettestcli --dotnet-test-pipe /tmp/5ce73541d0804fe5a2448d0cbba0fc76 (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)