// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System.CommandLine;
using System.CommandLine.Parsing;
using System.Text.Json;
using System.Text.Json.Serialization;
using AzureMcp.Core.Models.Command;
using AzureMcp.Postgres.Commands.Server;
using AzureMcp.Postgres.Services;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using NSubstitute;
using NSubstitute.ExceptionExtensions;
using Xunit;
namespace AzureMcp.Postgres.UnitTests.Server;
public class ServerListCommandTests
{
private readonly IServiceProvider _serviceProvider;
private readonly IPostgresService _postgresService;
private readonly ILogger<ServerListCommand> _logger;
public ServerListCommandTests()
{
_postgresService = Substitute.For<IPostgresService>();
_logger = Substitute.For<ILogger<ServerListCommand>>();
var collection = new ServiceCollection();
collection.AddSingleton(_postgresService);
_serviceProvider = collection.BuildServiceProvider();
}
[Fact]
public async Task ExecuteAsync_ReturnsServers_WhenServersExist()
{
var expectedServers = new List<string> { "server1", "server2" };
_postgresService.ListServersAsync("sub123", "rg1", "user1").Returns(expectedServers);
var command = new ServerListCommand(_logger);
var args = command.GetCommand().Parse(["--subscription", "sub123", "--resource-group", "rg1", "--user", "user1"]);
var context = new CommandContext(_serviceProvider);
var response = await command.ExecuteAsync(context, args);
Assert.NotNull(response);
Assert.Equal(200, response.Status);
Assert.Equal("Success", response.Message);
Assert.NotNull(response.Results);
var json = JsonSerializer.Serialize(response.Results);
var result = JsonSerializer.Deserialize<ServerListResult>(json);
Assert.NotNull(result);
Assert.Equal(expectedServers, result.Servers);
}
[Fact]
public async Task ExecuteAsync_ReturnsNull_WhenNoServers()
{
_postgresService.ListServersAsync("sub123", "rg1", "user1").Returns([]);
var command = new ServerListCommand(_logger);
var parser = new Parser(command.GetCommand());
var args = parser.Parse(["--subscription", "sub123", "--resource-group", "rg1", "--user", "user1"]);
var context = new CommandContext(_serviceProvider);
var response = await command.ExecuteAsync(context, args);
Assert.NotNull(response);
Assert.Null(response.Results);
}
[Fact]
public async Task ExecuteAsync_HandlesException()
{
var expectedError = "Test error. To mitigate this issue, please refer to the troubleshooting guidelines here at https://aka.ms/azmcp/troubleshooting.";
_postgresService.ListServersAsync("sub123", "rg1", "user1")
.ThrowsAsync(new Exception("Test error"));
var command = new ServerListCommand(_logger);
var parser = new Parser(command.GetCommand());
var args = parser.Parse(["--subscription", "sub123", "--resource-group", "rg1", "--user", "user1"]);
var context = new CommandContext(_serviceProvider);
var response = await command.ExecuteAsync(context, args);
Assert.NotNull(response);
Assert.Equal(500, response.Status);
Assert.Equal(expectedError, response.Message);
}
[Theory]
[InlineData("--subscription")]
[InlineData("--resource-group")]
[InlineData("--user")]
public async Task ExecuteAsync_ReturnsError_WhenParameterIsMissing(string missingParameter)
{
var command = new ServerListCommand(_logger);
var args = command.GetCommand().Parse(new string[]
{
missingParameter == "--subscription" ? "" : "--subscription", "sub123",
missingParameter == "--resource-group" ? "" : "--resource-group", "rg1",
missingParameter == "--user" ? "" : "--user", "user1",
});
var context = new CommandContext(_serviceProvider);
var response = await command.ExecuteAsync(context, args);
Assert.NotNull(response);
Assert.Equal(400, response.Status);
Assert.Equal($"Missing Required options: {missingParameter}", response.Message);
}
private class ServerListResult
{
[JsonPropertyName("Servers")]
public List<string> Servers { get; set; } = new List<string>();
}
}
