using System.Runtime.CompilerServices;
using Sbroenne.ExcelMcp.Core.Commands;
using Xunit;
namespace Sbroenne.ExcelMcp.Core.Tests.Helpers;
/// <summary>
/// Fixture for Connection tests that provides efficient test file creation.
/// Connection tests often need isolated files because they:
/// - Create/delete connections within a single test
/// - Need external source files for OLEDB connections
/// - Modify connection state
///
/// This fixture provides:
/// - A shared temp directory (auto-cleaned on disposal)
/// - Fast test file creation method
/// - Helper for creating external source files
/// </summary>
public class ConnectionTestsFixture : IAsyncLifetime
{
private readonly string _tempDir;
private readonly FileCommands _fileCommands = new();
/// <summary>
/// Temp directory for all test files (auto-cleaned on disposal)
/// </summary>
public string TempDir => _tempDir;
/// <summary>
/// Initializes a new instance of the fixture.
/// </summary>
public ConnectionTestsFixture()
{
_tempDir = Path.Join(Path.GetTempPath(), $"ConnectionTests_{Guid.NewGuid():N}");
Directory.CreateDirectory(_tempDir);
}
/// <inheritdoc/>
public Task InitializeAsync()
{
// No async initialization needed
return Task.CompletedTask;
}
/// <inheritdoc/>
public Task DisposeAsync()
{
try
{
if (Directory.Exists(_tempDir))
{
Directory.Delete(_tempDir, recursive: true);
}
}
catch
{
// Cleanup is best-effort
}
return Task.CompletedTask;
}
/// <summary>
/// Creates a unique empty test file for the calling test.
/// Uses [CallerMemberName] to auto-populate the test name.
/// </summary>
/// <param name="testName">Auto-populated from caller method name</param>
/// <returns>Path to the unique test file</returns>
public string CreateTestFile([CallerMemberName] string testName = "")
{
var guid = Guid.NewGuid().ToString("N")[..8];
var testFile = Path.Join(_tempDir, $"Conn_{testName}_{guid}.xlsx");
_fileCommands.CreateEmpty(testFile);
return testFile;
}
/// <summary>
/// Creates a unique source file path (does not create the file).
/// Used for OLEDB source workbooks that are created by test helpers.
/// </summary>
/// <param name="suffix">Optional suffix for the file name</param>
/// <param name="testName">Auto-populated from caller method name</param>
/// <returns>Path for the source file</returns>
public string GetSourceFilePath(string suffix = "Source", [CallerMemberName] string testName = "")
{
return Path.Join(_tempDir, $"{testName}_{suffix}.xlsx");
}
}
