ChatBot/ChatBot.Tests/Models/DatabaseSettingsTests.cs

using ChatBot.Models.Configuration;
using FluentAssertions;

namespace ChatBot.Tests.Models;

public class DatabaseSettingsTests
{
    [Fact]
    public void Constructor_ShouldInitializePropertiesWithDefaultValues()
    {
        // Arrange & Act
        var settings = new DatabaseSettings();

        // Assert
        settings.ConnectionString.Should().Be(string.Empty);
        settings.EnableSensitiveDataLogging.Should().BeFalse();
        settings.CommandTimeout.Should().Be(30);
    }

    [Fact]
    public void ConnectionString_ShouldBeSettable()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var expectedConnectionString =
            "Server=localhost;Database=testdb;User Id=user;Password=testpass;";

        // Act
        settings.ConnectionString = expectedConnectionString;

        // Assert
        settings.ConnectionString.Should().Be(expectedConnectionString);
    }

    [Fact]
    public void EnableSensitiveDataLogging_ShouldBeSettable()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.EnableSensitiveDataLogging = true;

        // Assert
        settings.EnableSensitiveDataLogging.Should().BeTrue();
    }

    [Fact]
    public void CommandTimeout_ShouldBeSettable()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var expectedTimeout = 60;

        // Act
        settings.CommandTimeout = expectedTimeout;

        // Assert
        settings.CommandTimeout.Should().Be(expectedTimeout);
    }

    [Theory]
    [InlineData("")]
    [InlineData("Server=localhost;Database=testdb;")]
    [InlineData("Server=localhost;Port=5432;Database=chatbot;User Id=admin;Password=testpass;")]
    [InlineData(
        "Host=localhost;Port=5432;Database=chatbot;Username=admin;Password=testpass;Pooling=true;MinPoolSize=0;MaxPoolSize=100;"
    )]
    [InlineData("Data Source=localhost;Initial Catalog=chatbot;Integrated Security=true;")]
    [InlineData(
        "Server=localhost;Database=chatbot;Trusted_Connection=true;MultipleActiveResultSets=true;"
    )]
    public void ConnectionString_ShouldAcceptVariousFormats(string connectionString)
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.ConnectionString = connectionString;

        // Assert
        settings.ConnectionString.Should().Be(connectionString);
    }

    [Theory]
    [InlineData(true)]
    [InlineData(false)]
    public void EnableSensitiveDataLogging_ShouldAcceptBooleanValues(bool enabled)
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.EnableSensitiveDataLogging = enabled;

        // Assert
        settings.EnableSensitiveDataLogging.Should().Be(enabled);
    }

    [Theory]
    [InlineData(0)]
    [InlineData(1)]
    [InlineData(30)]
    [InlineData(60)]
    [InlineData(300)]
    [InlineData(int.MaxValue)]
    public void CommandTimeout_ShouldAcceptVariousValues(int timeout)
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.CommandTimeout = timeout;

        // Assert
        settings.CommandTimeout.Should().Be(timeout);
    }

    [Fact]
    public void AllProperties_ShouldBeMutable()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.ConnectionString = "Server=test;Database=testdb;";
        settings.EnableSensitiveDataLogging = true;
        settings.CommandTimeout = 120;

        // Assert
        settings.ConnectionString.Should().Be("Server=test;Database=testdb;");
        settings.EnableSensitiveDataLogging.Should().BeTrue();
        settings.CommandTimeout.Should().Be(120);
    }

    [Fact]
    public void Settings_ShouldSupportEmptyConnectionString()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.ConnectionString = "";

        // Assert
        settings.ConnectionString.Should().Be("");
    }

    [Fact]
    public void Settings_ShouldSupportNullConnectionString()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.ConnectionString = null!;

        // Assert
        settings.ConnectionString.Should().BeNull();
    }

    [Fact]
    public void Settings_ShouldSupportVeryLongConnectionString()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var longConnectionString = new string('A', 1000);

        // Act
        settings.ConnectionString = longConnectionString;

        // Assert
        settings.ConnectionString.Should().Be(longConnectionString);
        settings.ConnectionString.Length.Should().Be(1000);
    }

    [Fact]
    public void Settings_ShouldSupportPostgreSQLConnectionString()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var postgresConnectionString =
            "Host=localhost;Port=5432;Database=chatbot;Username=admin;Password=testpass;Pooling=true;MinPoolSize=0;MaxPoolSize=100;Connection Lifetime=0;";

        // Act
        settings.ConnectionString = postgresConnectionString;

        // Assert
        settings.ConnectionString.Should().Be(postgresConnectionString);
    }

    [Fact]
    public void Settings_ShouldSupportSQLServerConnectionString()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var sqlServerConnectionString =
            "Server=localhost;Database=chatbot;User Id=admin;Password=testpass;TrustServerCertificate=true;";

        // Act
        settings.ConnectionString = sqlServerConnectionString;

        // Assert
        settings.ConnectionString.Should().Be(sqlServerConnectionString);
    }

    [Fact]
    public void Settings_ShouldSupportSQLiteConnectionString()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var sqliteConnectionString = "Data Source=chatbot.db;Cache=Shared;";

        // Act
        settings.ConnectionString = sqliteConnectionString;

        // Assert
        settings.ConnectionString.Should().Be(sqliteConnectionString);
    }

    [Fact]
    public void Settings_ShouldSupportMySQLConnectionString()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var mysqlConnectionString =
            "Server=localhost;Port=3306;Database=chatbot;Uid=admin;Pwd=testpass;";

        // Act
        settings.ConnectionString = mysqlConnectionString;

        // Assert
        settings.ConnectionString.Should().Be(mysqlConnectionString);
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithSpecialCharacters()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var connectionStringWithSpecialChars =
            "Server=localhost;Database=test-db;User Id=user@domain.com;Password=testpass123!;";

        // Act
        settings.ConnectionString = connectionStringWithSpecialChars;

        // Assert
        settings.ConnectionString.Should().Be(connectionStringWithSpecialChars);
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithUnicode()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var connectionStringWithUnicode =
            "Server=localhost;Database=тестовая_база;User Id=пользователь;Password=testpass;";

        // Act
        settings.ConnectionString = connectionStringWithUnicode;

        // Assert
        settings.ConnectionString.Should().Be(connectionStringWithUnicode);
    }

    [Fact]
    public void Settings_ShouldSupportZeroCommandTimeout()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.CommandTimeout = 0;

        // Assert
        settings.CommandTimeout.Should().Be(0);
    }

    [Fact]
    public void Settings_ShouldSupportNegativeCommandTimeout()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.CommandTimeout = -1;

        // Assert
        settings.CommandTimeout.Should().Be(-1);
    }

    [Fact]
    public void Settings_ShouldSupportMaxIntCommandTimeout()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.CommandTimeout = int.MaxValue;

        // Assert
        settings.CommandTimeout.Should().Be(int.MaxValue);
    }

    [Fact]
    public void Settings_ShouldSupportMinIntCommandTimeout()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.CommandTimeout = int.MinValue;

        // Assert
        settings.CommandTimeout.Should().Be(int.MinValue);
    }

    [Fact]
    public void Settings_ShouldSupportDevelopmentMode()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.EnableSensitiveDataLogging = true;
        settings.ConnectionString = "Server=localhost;Database=chatbot_dev;";

        // Assert
        settings.EnableSensitiveDataLogging.Should().BeTrue();
        settings.ConnectionString.Should().Be("Server=localhost;Database=chatbot_dev;");
    }

    [Fact]
    public void Settings_ShouldSupportProductionMode()
    {
        // Arrange
        var settings = new DatabaseSettings();

        // Act
        settings.EnableSensitiveDataLogging = false;
        settings.ConnectionString = "Server=prod-server;Database=chatbot_prod;";

        // Assert
        settings.EnableSensitiveDataLogging.Should().BeFalse();
        settings.ConnectionString.Should().Be("Server=prod-server;Database=chatbot_prod;");
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithMultipleParameters()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var complexConnectionString =
            "Server=localhost;Port=5432;Database=chatbot;Username=admin;Password=testpass;Pooling=true;MinPoolSize=5;MaxPoolSize=100;Connection Lifetime=300;Command Timeout=60;";

        // Act
        settings.ConnectionString = complexConnectionString;

        // Assert
        settings.ConnectionString.Should().Be(complexConnectionString);
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithSpaces()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var connectionStringWithSpaces =
            "Server = localhost ; Database = chatbot ; User Id = admin ; Password = testpass ;";

        // Act
        settings.ConnectionString = connectionStringWithSpaces;

        // Assert
        settings.ConnectionString.Should().Be(connectionStringWithSpaces);
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithQuotes()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var connectionStringWithQuotes =
            "Server=\"localhost\";Database=\"chatbot\";User Id=\"admin\";Password=\"testpass\";";

        // Act
        settings.ConnectionString = connectionStringWithQuotes;

        // Assert
        settings.ConnectionString.Should().Be(connectionStringWithQuotes);
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithSemicolons()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var connectionStringWithSemicolons =
            "Server=localhost;;Database=chatbot;;User Id=admin;;Password=testpass;;";

        // Act
        settings.ConnectionString = connectionStringWithSemicolons;

        // Assert
        settings.ConnectionString.Should().Be(connectionStringWithSemicolons);
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithEquals()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var connectionStringWithEquals =
            "Server=localhost;Database=chatbot;User Id=admin;Password=testpass=123;";

        // Act
        settings.ConnectionString = connectionStringWithEquals;

        // Assert
        settings.ConnectionString.Should().Be(connectionStringWithEquals);
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithNewlines()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var connectionStringWithNewlines =
            "Server=localhost;\nDatabase=chatbot;\nUser Id=admin;\nPassword=testpass;";

        // Act
        settings.ConnectionString = connectionStringWithNewlines;

        // Assert
        settings.ConnectionString.Should().Be(connectionStringWithNewlines);
    }

    [Fact]
    public void Settings_ShouldSupportConnectionStringWithTabs()
    {
        // Arrange
        var settings = new DatabaseSettings();
        var connectionStringWithTabs =
            "Server=localhost;\tDatabase=chatbot;\tUser Id=admin;\tPassword=testpass;";

        // Act
        settings.ConnectionString = connectionStringWithTabs;

        // Assert
        settings.ConnectionString.Should().Be(connectionStringWithTabs);
    }
}