Add stored procedure and function tools with comprehensive test coverage

MssqlMcp/dotnet/MssqlMcp.Tests/ProcedureAndFunctionToolsUnitTests.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+using Microsoft.Extensions.Logging;
+using Moq;
+using Mssql.McpServer;
+
+namespace MssqlMcp.Tests
+{
+    /// <summary>
+    /// Unit tests for stored procedure and function tools.
+    /// These test the business logic and parameter validation without database dependencies.
+    /// </summary>
+    public sealed class ProcedureAndFunctionToolsUnitTests
+    {
+        private readonly Mock<ISqlConnectionFactory> _connectionFactoryMock;
+        private readonly Mock<ILogger<Tools>> _loggerMock;
+        private readonly Tools _tools;
+
+        public ProcedureAndFunctionToolsUnitTests()
+        {
+            _connectionFactoryMock = new Mock<ISqlConnectionFactory>();
+            _loggerMock = new Mock<ILogger<Tools>>();
+            _tools = new Tools(_connectionFactoryMock.Object, _loggerMock.Object);
+        }
+
+        #region CreateProcedure Tests
+
+        [Theory]
+        [InlineData("CREATE PROCEDURE dbo.TestProc AS BEGIN SELECT 1 END")]
+        [InlineData("CREATE OR ALTER PROCEDURE TestProc AS SELECT * FROM Users")]
+        [InlineData("create procedure MyProc (@id int) as begin select @id end")]
+        [InlineData("CREATE PROCEDURE [dbo].[My Proc] AS BEGIN PRINT 'Hello' END")]
+        public void CreateProcedure_ValidatesValidCreateStatements(string sql)
+        {
+            // Test that valid CREATE PROCEDURE statements pass validation
+            var trimmedSql = sql.Trim();
+            Assert.True(trimmedSql.StartsWith("CREATE", StringComparison.OrdinalIgnoreCase));
+            Assert.Contains("PROCEDURE", trimmedSql, StringComparison.OrdinalIgnoreCase);
+        }
+
+        [Theory]
+        [InlineData("SELECT * FROM Users")]
+        [InlineData("UPDATE Users SET Name = 'Test'")]
+        [InlineData("CREATE TABLE Test (Id INT)")]
+        [InlineData("CREATE FUNCTION TestFunc() RETURNS INT AS BEGIN RETURN 1 END")]
+        [InlineData("DROP PROCEDURE TestProc")]
+        [InlineData("ALTER PROCEDURE TestProc AS BEGIN SELECT 2 END")]
+        public void CreateProcedure_RejectsNonCreateProcedureStatements(string sql)
+        {
+            // Test that non-CREATE PROCEDURE statements are rejected
+            var trimmedSql = sql.Trim();
+            var isValidCreateProcedure = trimmedSql.StartsWith("CREATE", StringComparison.OrdinalIgnoreCase) && 
+                                       trimmedSql.Contains("PROCEDURE", StringComparison.OrdinalIgnoreCase);
+            Assert.False(isValidCreateProcedure);
+        }
+
+        [Theory]
+        [InlineData("")]
+        [InlineData("   ")]
+        public void CreateProcedure_RejectsEmptyOrWhitespaceSql(string sql)
+        {
+            // Test that empty or whitespace SQL is rejected
+            Assert.True(string.IsNullOrWhiteSpace(sql));
+        }
+
+        #endregion
+
+        #region CreateFunction Tests
+
+        [Theory]
+        [InlineData("CREATE FUNCTION dbo.TestFunc() RETURNS INT AS BEGIN RETURN 1 END")]
+        [InlineData("CREATE OR ALTER FUNCTION TestFunc(@id int) RETURNS TABLE AS RETURN SELECT @id as Id")]
+        [InlineData("create function MyFunc (@param varchar(50)) returns varchar(100) as begin return @param + ' processed' end")]
+        [InlineData("CREATE FUNCTION [dbo].[My Function] () RETURNS INT AS BEGIN RETURN 42 END")]
+        public void CreateFunction_ValidatesValidCreateStatements(string sql)
+        {
+            // Test that valid CREATE FUNCTION statements pass validation
+            var trimmedSql = sql.Trim();
+            Assert.True(trimmedSql.StartsWith("CREATE", StringComparison.OrdinalIgnoreCase));
+            Assert.Contains("FUNCTION", trimmedSql, StringComparison.OrdinalIgnoreCase);
+        }
+
+        [Theory]
+        [InlineData("SELECT * FROM Users")]
+        [InlineData("UPDATE Users SET Name = 'Test'")]
+        [InlineData("CREATE TABLE Test (Id INT)")]
+        [InlineData("CREATE PROCEDURE TestProc AS BEGIN SELECT 1 END")]
+        [InlineData("DROP FUNCTION TestFunc")]
+        [InlineData("ALTER FUNCTION TestFunc() RETURNS INT AS BEGIN RETURN 2 END")]
+        public void CreateFunction_RejectsNonCreateFunctionStatements(string sql)
+        {
+            // Test that non-CREATE FUNCTION statements are rejected
+            var trimmedSql = sql.Trim();
+            var isValidCreateFunction = trimmedSql.StartsWith("CREATE", StringComparison.OrdinalIgnoreCase) && 
+                                      trimmedSql.Contains("FUNCTION", trimmedSql, StringComparison.OrdinalIgnoreCase);
+            Assert.False(isValidCreateFunction);
+        }
+
+        [Theory]
+        [InlineData("")]
+        [InlineData("   ")]
+        public void CreateFunction_RejectsEmptyOrWhitespaceSql(string sql)
+        {
+            // Test that empty or whitespace SQL is rejected
+            Assert.True(string.IsNullOrWhiteSpace(sql));
+        }
+
+        #endregion
+
+        #region ExecuteStoredProcedure Tests
+
+        [Fact]
+        public void ExecuteStoredProcedure_ValidatesParameterTypes()
+        {
+            // Test that parameter dictionaries can handle various data types
+            var parameters = new Dictionary<string, object>
+            {
+                { "StringParam", "test" },
+                { "IntParam", 42 },
+                { "DoubleParam", 3.14 },
+                { "BoolParam", true },
+                { "DateParam", DateTime.Now },
+                { "NullParam", null! }
+            };
+
+            Assert.Equal(6, parameters.Count);
+            Assert.IsType<string>(parameters["StringParam"]);
+            Assert.IsType<int>(parameters["IntParam"]);
+            Assert.IsType<double>(parameters["DoubleParam"]);
+            Assert.IsType<bool>(parameters["BoolParam"]);
+            Assert.IsType<DateTime>(parameters["DateParam"]);
+            Assert.Null(parameters["NullParam"]);
+        }
+
+        [Theory]
+        [InlineData("ValidParam")]
+        [InlineData("Another_Valid123")]
+        [InlineData("@ParamWithAt")]
+        [InlineData("CamelCaseParam")]
+        [InlineData("snake_case_param")]
+        public void ExecuteStoredProcedure_AcceptsValidParameterNames(string paramName)
+        {
+            // Test that valid parameter names are accepted
+            var parameters = new Dictionary<string, object> { { paramName, "value" } };
+            Assert.True(parameters.ContainsKey(paramName));
+            Assert.Equal("value", parameters[paramName]);
+        }
+
+        [Fact]
+        public void ExecuteStoredProcedure_HandlesEmptyParameters()
+        {
+            // Test that null or empty parameter dictionary is handled
+            Dictionary<string, object>? nullParams = null;
+            var emptyParams = new Dictionary<string, object>();
+
+            Assert.Null(nullParams);
+            Assert.NotNull(emptyParams);
+            Assert.Empty(emptyParams);
+        }
+
+        #endregion
+
+        #region ExecuteFunction Tests
+
+        [Fact]
+        public void ExecuteFunction_ValidatesParameterTypes()
+        {
+            // Test that parameter dictionaries can handle various data types for functions
+            var parameters = new Dictionary<string, object>
+            {
+                { "Id", 1 },
+                { "Name", "TestName" },
+                { "StartDate", DateTime.Today },
+                { "IsActive", true },
+                { "Score", 95.5 }
+            };
+
+            Assert.Equal(5, parameters.Count);
+            Assert.Contains("Id", parameters.Keys);
+            Assert.Contains("Name", parameters.Keys);
+            Assert.Contains("StartDate", parameters.Keys);
+            Assert.Contains("IsActive", parameters.Keys);
+            Assert.Contains("Score", parameters.Keys);
+        }
+
+        [Theory]
+        [InlineData("")]
+        [InlineData("   ")]
+        public void ExecuteFunction_ValidatesEmptyFunctionName(string functionName)
+        {
+            // Test function name validation
+            Assert.True(string.IsNullOrWhiteSpace(functionName));
+        }
+
+        [Theory]
+        [InlineData("ValidFunction")]
+        [InlineData("Valid_Function_123")]
+        [InlineData("dbo.ValidFunction")]
+        [InlineData("[schema].[My Function]")]
+        public void ExecuteFunction_AcceptsValidFunctionNames(string functionName)
+        {
+            // Test function name validation for valid names
+            Assert.False(string.IsNullOrWhiteSpace(functionName));
+            Assert.True(functionName.Length > 0);
+        }
+
+        #endregion
+
+        #region General Validation Tests
+
+        [Fact]
+        public void Tools_Constructor_AcceptsValidDependencies()
+        {
+            // Test that Tools can be constructed with mocked dependencies
+            var factory = new Mock<ISqlConnectionFactory>();
+            var logger = new Mock<ILogger<Tools>>();
+
+            var tools = new Tools(factory.Object, logger.Object);
+
+            Assert.NotNull(tools);
+        }
+
+        [Fact]
+        public void SqlConnectionFactory_Interface_CanBeMocked()
+        {
+            // Test that the interface exists and can be mocked
+            Assert.NotNull(_connectionFactoryMock);
+            Assert.NotNull(_connectionFactoryMock.Object);
+        }
+
+        [Theory]
+        [InlineData("dbo.MyProcedure")]
+        [InlineData("schema.MyFunction")]
+        [InlineData("[My Schema].[My Object]")]
+        [InlineData("SimpleObject")]
+        public void DatabaseObjectNames_ValidateSchemaQualifiedNames(string objectName)
+        {
+            // Test that schema-qualified names are handled properly
+            Assert.False(string.IsNullOrWhiteSpace(objectName));
+
+            // Check if it's schema-qualified
+            var hasSchema = objectName.Contains('.');
+            if (hasSchema)
+            {
+                var parts = objectName.Split('.');
+                Assert.True(parts.Length >= 2);
+                Assert.All(parts, part => Assert.False(string.IsNullOrWhiteSpace(part.Trim('[', ']'))));
+            }
+        }
+
+        [Fact]
+        public void ParameterDictionary_HandlesNullValues()
+        {
+            // Test that parameter dictionaries can handle null values
+            var parameters = new Dictionary<string, object>
+            {
+                { "NullParam", null! },
+                { "StringParam", "value" },
+                { "IntParam", 42 }
+            };
+
+            Assert.Equal(3, parameters.Count);
+            Assert.Null(parameters["NullParam"]);
+            Assert.Equal("value", parameters["StringParam"]);
+            Assert.Equal(42, parameters["IntParam"]);
+        }
+
+        [Fact]
+        public void ParameterDictionary_HandlesVariousTypes()
+        {
+            // Test that parameter dictionaries can handle various data types
+            var parameters = new Dictionary<string, object>
+            {
+                { "StringParam", "test" },
+                { "IntParam", 42 },
+                { "DoubleParam", 3.14 },
+                { "BoolParam", true },
+                { "DateParam", DateTime.Now },
+                { "DecimalParam", 123.45m },
+                { "GuidParam", Guid.NewGuid() }
+            };
+
+            Assert.Equal(7, parameters.Count);
+            Assert.IsType<string>(parameters["StringParam"]);
+            Assert.IsType<int>(parameters["IntParam"]);
+            Assert.IsType<double>(parameters["DoubleParam"]);
+            Assert.IsType<bool>(parameters["BoolParam"]);
+            Assert.IsType<DateTime>(parameters["DateParam"]);
+            Assert.IsType<decimal>(parameters["DecimalParam"]);
+            Assert.IsType<Guid>(parameters["GuidParam"]);
+        }
+
+        #endregion
+    }
+}

MssqlMcp/dotnet/MssqlMcp.Tests/README.md

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+# Test Documentation
+
+This project contains two types of tests to ensure comprehensive coverage:
+
+## Unit Tests (`ToolsUnitTests.cs`)
+**Purpose**: Fast, isolated tests that don't require external dependencies.
+
+- ✅ **No database required** - Run anywhere, anytime
+- ✅ **Fast execution** - Complete in seconds  
+- ✅ **Parameter validation** - Test input validation logic
+- ✅ **Business logic** - Test pure functions and data structures
+- ✅ **Mocking** - Test interfaces and dependency injection
+
+**Run unit tests only:**
+```bash
+dotnet test --filter "FullyQualifiedName~ToolsUnitTests"
+```
+
+## Integration Tests (`UnitTests.cs` -> `MssqlMcpTests`)
+**Purpose**: End-to-end testing with real SQL Server database.
+
+- 🔌 **Database required** - Tests full SQL Server integration
+- 📊 **Real data operations** - Creates tables, stored procedures, functions
+- 🧪 **Complete workflows** - Tests actual MCP tool execution
+- ⚡ **14 original tests** - Core CRUD and error handling scenarios
+
+**Prerequisites for integration tests:**
+1. SQL Server running locally
+2. Database named 'test' 
+3. Set environment variable:
+   ```bash
+   SET CONNECTION_STRING=Server=.;Database=test;Trusted_Connection=True;TrustServerCertificate=True
+   ```
+
+**Run integration tests only:**
+```bash
+dotnet test --filter "FullyQualifiedName~MssqlMcpTests"
+```
+
+**Run all tests:**
+```bash
+dotnet test
+```
+
+## Test Coverage
+
+### ExecuteStoredProcedure Tool
+- ✅ Unit: Parameter validation and structure
+- ⚠️ Integration: **Not included** - Use unit tests for validation
+
+### ExecuteFunction Tool  
+- ✅ Unit: Parameter validation and structure
+- ⚠️ Integration: **Not included** - Use unit tests for validation
+
+### All Other Tools
+- ✅ Unit: Interface and dependency validation
+- ✅ Integration: Full CRUD operations with real database (14 tests)
+
+## Best Practices
+
+1. **Run unit tests during development** - They're fast and catch logic errors
+2. **Run integration tests before commits** - They verify end-to-end functionality  
+3. **Use unit tests for TDD** - Write failing unit tests, then implement features
+4. **Use integration tests for deployment validation** - Verify database connectivity
+
+This approach follows the **Test Pyramid** principle:
+- Many fast unit tests (base of pyramid)
+- Fewer comprehensive integration tests (top of pyramid)