EmailBill/WebApi.Test/Application/ConfigApplicationTest.cs

namespace WebApi.Test.Application;

/// <summary>
/// ConfigApplication 单元测试
/// </summary>
public class ConfigApplicationTest : BaseApplicationTest
{
    private readonly IConfigService _configService;
    private readonly ILogger<ConfigApplication> _logger;
    private readonly ConfigApplication _application;

    public ConfigApplicationTest()
    {
        _configService = Substitute.For<IConfigService>();
        _logger = CreateMockLogger<ConfigApplication>();
        _application = new ConfigApplication(_configService, _logger);
    }

    #region GetConfigAsync Tests

    [Fact]
    public async Task GetConfigAsync_有效Key_应返回配置值()
    {
        // Arrange
        const string key = "test-key";
        const string expectedValue = "test-value";
        _configService.GetConfigByKeyAsync<string>(key).Returns(expectedValue);

        // Act
        var result = await _application.GetConfigAsync(key);

        // Assert
        result.Should().Be(expectedValue);
        await _configService.Received(1).GetConfigByKeyAsync<string>(key);
    }

    [Fact]
    public async Task GetConfigAsync_配置不存在_应返回空字符串()
    {
        // Arrange
        const string key = "non-existent-key";
        _configService.GetConfigByKeyAsync<string>(key).Returns((string?)null);

        // Act
        var result = await _application.GetConfigAsync(key);

        // Assert
        result.Should().BeEmpty();
    }

    [Fact]
    public async Task GetConfigAsync_空Key_应抛出ValidationException()
    {
        // Arrange & Act & Assert
        await Assert.ThrowsAsync<ValidationException>(() => 
            _application.GetConfigAsync(string.Empty));
    }

    [Fact]
    public async Task GetConfigAsync_空白Key_应抛出ValidationException()
    {
        // Arrange & Act & Assert
        await Assert.ThrowsAsync<ValidationException>(() => 
            _application.GetConfigAsync("   "));
    }

    #endregion

    #region SetConfigAsync Tests

    [Fact]
    public async Task SetConfigAsync_有效参数_应成功设置()
    {
        // Arrange
        const string key = "test-key";
        const string value = "test-value";
        _configService.SetConfigByKeyAsync(key, value).Returns(true);

        // Act
        await _application.SetConfigAsync(key, value);

        // Assert
        await _configService.Received(1).SetConfigByKeyAsync(key, value);
    }

    [Fact]
    public async Task SetConfigAsync_空Key_应抛出ValidationException()
    {
        // Arrange & Act & Assert
        await Assert.ThrowsAsync<ValidationException>(() => 
            _application.SetConfigAsync(string.Empty, "value"));
    }

    [Fact]
    public async Task SetConfigAsync_设置失败_应抛出BusinessException()
    {
        // Arrange
        const string key = "test-key";
        const string value = "test-value";
        _configService.SetConfigByKeyAsync(key, value).Returns(false);

        // Act & Assert
        var exception = await Assert.ThrowsAsync<BusinessException>(() => 
            _application.SetConfigAsync(key, value));
        exception.Message.Should().Contain(key);
    }

    [Fact]
    public async Task SetConfigAsync_成功设置_应记录日志()
    {
        // Arrange
        const string key = "test-key";
        const string value = "test-value";
        _configService.SetConfigByKeyAsync(key, value).Returns(true);

        // Act
        await _application.SetConfigAsync(key, value);

        // Assert
        _logger.Received().Log(
            LogLevel.Information,
            Arg.Any<EventId>(),
            Arg.Is<object>(o => o.ToString()!.Contains(key)),
            Arg.Any<Exception>(),
            Arg.Any<Func<object, Exception?, string>>()!
        );
    }

    #endregion
}