add tests

ChatBot.Tests/Configuration/Validators/DatabaseSettingsValidatorTests.cs

@@ -0,0 +1,92 @@
+using ChatBot.Models.Configuration;
+using ChatBot.Models.Configuration.Validators;
+using FluentAssertions;
+
+namespace ChatBot.Tests.Configuration.Validators;
+
+public class DatabaseSettingsValidatorTests
+{
+    private readonly DatabaseSettingsValidator _validator = new();
+
+    [Fact]
+    public void Validate_ShouldReturnSuccess_WhenSettingsAreValid()
+    {
+        // Arrange
+        var settings = new DatabaseSettings
+        {
+            ConnectionString =
+                "Host=localhost;Port=5432;Database=chatbot;Username=user;Password=pass",
+            CommandTimeout = 30,
+            EnableSensitiveDataLogging = false,
+        };
+
+        // Act
+        var result = _validator.Validate(null, settings);
+
+        // Assert
+        result.Succeeded.Should().BeTrue();
+    }
+
+    [Fact]
+    public void Validate_ShouldReturnFailure_WhenConnectionStringIsEmpty()
+    {
+        // Arrange
+        var settings = new DatabaseSettings
+        {
+            ConnectionString = "",
+            CommandTimeout = 30,
+            EnableSensitiveDataLogging = false,
+        };
+
+        // Act
+        var result = _validator.Validate(null, settings);
+
+        // Assert
+        result.Succeeded.Should().BeFalse();
+        result.Failures.Should().Contain(f => f.Contains("Database connection string is required"));
+    }
+
+    [Fact]
+    public void Validate_ShouldReturnFailure_WhenCommandTimeoutIsInvalid()
+    {
+        // Arrange
+        var settings = new DatabaseSettings
+        {
+            ConnectionString =
+                "Host=localhost;Port=5432;Database=chatbot;Username=user;Password=pass",
+            CommandTimeout = 0, // Invalid: <= 0
+            EnableSensitiveDataLogging = false,
+        };
+
+        // Act
+        var result = _validator.Validate(null, settings);
+
+        // Assert
+        result.Succeeded.Should().BeFalse();
+        result.Failures.Should().Contain(f => f.Contains("Command timeout must be greater than 0"));
+    }
+
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    public void Validate_ShouldReturnFailure_WhenConnectionStringIsNullOrWhitespace(
+        string? connectionString
+    )
+    {
+        // Arrange
+        var settings = new DatabaseSettings
+        {
+            ConnectionString = connectionString!,
+            CommandTimeout = 30,
+            EnableSensitiveDataLogging = false,
+        };
+
+        // Act
+        var result = _validator.Validate(null, settings);
+
+        // Assert
+        result.Succeeded.Should().BeFalse();
+        result.Failures.Should().Contain(f => f.Contains("Database connection string is required"));
+    }
+}