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Guidelines for Building Microsoft.Data.SqlClient

This document provides all the necessary details to build the driver and run tests present in the repository.

Visual Studio Pre-Requisites

This project should be built with Visual Studio 2019+ for the best compatibility. The required set of components are provided in the below file:

Once the environment is setup properly, execute the desired set of commands below from the root folder to perform the respective operations:

Building the driver

# Default Build Configuration:

msbuild
# Builds the driver for the Client OS in 'Debug' Configuration for 'AnyCPU' platform.
# Both .NET Framework (NetFx) and .NET (CoreFx) drivers are built by default (as supported by Client OS).
msbuild -t:clean
# Cleans all build directories.
msbuild -p:Configuration=Release
# Builds the driver in 'Release' Configuration for `AnyCPU` platform.
msbuild -t:restore
# Restores Nuget Packages.
msbuild -t:BuildAllConfigurations
# Builds the driver for all target OSes and supported platforms.
msbuild -p:BuildNetFx=false
# Skips building the .NET Framework (NetFx) Driver on Windows.
# On Unix the netfx driver build is automatically skipped.
msbuild -p:OSGroup=Unix
# Builds the driver for the Unix platform.
msbuild -t:BuildNetCoreAllOS
# Builds the .NET driver for all Operating Systems.

Building Tests

msbuild -t:BuildTestsNetCore
# Build the tests for the .NET driver in 'Debug' Configuration. Default .NET version is 6.0.
msbuild -t:BuildTestsNetFx
# Build the tests for the .NET Framework (NetFx) driver in 'Debug' Configuration. Default .NET Framework version is 4.6.2.
msbuild -t:BuildTestsNetCore -p:TestSet=1
# Build a subset of the manual tests. Valid values: '1', '2', '3', 'AE'. Omit to build all tests.

Running Tests

There are 2 ways to run tests, using MsBuild or Dotnet SDK.

Running from Build.proj

msbuild -t:RunFunctionalTests
# Run all functional tests in Debug configuration for *default* target framework (.NET 6.0).
msbuild -t:RunManualTests
# Run all manual tests in Debug configuration for *default* target framework (.NET 6.0).
msbuild -t:RunTests -p:configuration=Release
# Run both functional and manual tests in Release configuration for *default* target framework (.NET 6.0).
msbuild -t:RunTests -p:configuration=Release -p:DotnetPath=C:\net6-win-x86\
# Run both functional and manual tests in Release configuration for *default* target framework (.NET 6.0) against the installed dotnet tool in the provided path.

To specify custom target framework, use TF property:

msbuild -t:RunTests -p:configuration=Release -p:TF=net8.0
msbuild -t:RunTests -p:configuration=Release -p:TF=net48
# Runs tests for specified target framework. 
# TargetNetCoreVersion and TargetNetFxVersion are not to be used with TF property, they will take precedence over TF if provided.

To capture test and code coverage results in a custom directory:

msbuild -t:RunTests -p:ResultsDirectory=MyDirectory
# Runs tests with test and code coverage results placed in provided results directory.
# Default results directory is "TestResults".

Other properties can be set alongside as needed.

Running using Dotnet SDK (traditional)

Run Functional Tests

  • Windows (netfx x86):
dotnet test "src\Microsoft.Data.SqlClient\tests\FunctionalTests\Microsoft.Data.SqlClient.Tests.csproj" -p:Platform="x86" -p:Configuration="Release" -p:TestTargetOS="Windowsnetfx" --no-build -v n --filter "category!=nonnetfxtests&category!=failing&category!=nonwindowstests"
  • Windows (netfx x64):
dotnet test "src\Microsoft.Data.SqlClient\tests\FunctionalTests\Microsoft.Data.SqlClient.Tests.csproj" -p:Platform="x64" -p:Configuration="Release" -p:TestTargetOS="Windowsnetfx" --no-build -v n --filter "category!=nonnetfxtests&category!=failing&category!=nonwindowstests"

  • AnyCPU:

    Project reference only builds Driver with AnyCPU platform, and underlying process decides to run the tests with a compatible architecture (x64, x86, ARM64).

    Windows (netcoreapp):

dotnet test "src\Microsoft.Data.SqlClient\tests\FunctionalTests\Microsoft.Data.SqlClient.Tests.csproj" -p:Platform="AnyCPU" -p:Configuration="Release" -p:TestTargetOS="Windowsnetcoreapp" --no-build -v n --filter "category!=nonnetcoreapptests&category!=failing&category!=nonwindowstests"

Unix (netcoreapp):

dotnet test "src/Microsoft.Data.SqlClient/tests/FunctionalTests/Microsoft.Data.SqlClient.Tests.csproj" -p:Platform="AnyCPU" -p:Configuration="Release" -p:TestTargetOS="Unixnetcoreapp" --no-build -v n --filter "category!=nonnetcoreapptests&category!=failing&category!=nonlinuxtests&category!=nonuaptests"

Run Manual Tests

Pre-Requisites for running Manual tests

Manual Tests require the below setup to run:

  • SQL Server with enabled Shared Memory, TCP and Named Pipes Protocols and access to the Client OS.

  • Databases "NORTHWIND" and "UdtTestDb" present in SQL Server, created using SQL scripts createNorthwindDb.sql and createUdtTestDb.sql. To setup an Azure Database with "NORTHWIND" tables, use SQL Script: createNorthwindAzureDb.sql.

  • Make a copy of the configuration file config.default.json and rename it to config.json. Update the values in config.json:

    Property Description Value
    TCPConnectionString Connection String for a TCP enabled SQL Server instance. Server={servername};Database={Database_Name};Trusted_Connection=True;
    OR Data Source={servername};Initial Catalog={Database_Name};Integrated Security=True;
    NPConnectionString Connection String for a Named Pipes enabled SQL Server instance. Server=\\{servername}\pipe\sql\query;Database={Database_Name};Trusted_Connection=True;
    OR
    Data Source=np:{servername};Initial Catalog={Database_Name};Integrated Security=True;
    TCPConnectionStringHGSVBS (Optional) Connection String for a TCP enabled SQL Server with Host Guardian Service (HGS) attestation protocol configuration. Server=tcp:{servername}; Database={Database_Name}; UID={UID}; PWD={PWD}; Attestation Protocol = HGS; Enclave Attestation Url = {AttestationURL};
    TCPConnectionStringAASVBS (Optional) Connection String for a TCP enabled SQL Server with a VBS Enclave and using Microsoft Azure Attestation (AAS) attestation protocol configuration. Server=tcp:{servername}; Database={Database_Name}; UID={UID}; PWD={PWD}; Attestation Protocol = AAS; Enclave Attestation Url = {AttestationURL};
    TCPConnectionStringNoneVBS (Optional) Connection String for a TCP enabled SQL Server with a VBS Enclave and using None Attestation protocol configuration. Server=tcp:{servername}; Database={Database_Name}; UID={UID}; PWD={PWD}; Attestation Protocol = NONE;
    TCPConnectionStringAASSGX (Optional) Connection String for a TCP enabled SQL Server with a SGX Enclave and using Microsoft Azure Attestation (AAS) attestation protocol configuration. Server=tcp:{servername}; Database={Database_Name}; UID={UID}; PWD={PWD}; Attestation Protocol = AAS; Enclave Attestation Url = {AttestationURL};
    EnclaveEnabled Enables tests requiring an enclave-configured server.
    TracingEnabled Enables EventSource related tests
    AADAuthorityURL (Optional) Identifies the OAuth2 authority resource for Server specified in AADPasswordConnectionString https://login.windows.net/<tenant>, where <tenant> is the tenant ID of the Azure Active Directory (Azure AD) tenant
    AADPasswordConnectionString (Optional) Connection String for testing Azure Active Directory Password Authentication. Data Source={server.database.windows.net}; Initial Catalog={Azure_DB_Name};Authentication=Active Directory Password; User ID={AAD_User}; Password={AAD_User_Password};
    AADSecurePrincipalId (Optional) The Application Id of a registered application which has been granted permission to the database defined in the AADPasswordConnectionString. {Application ID}
    AADSecurePrincipalSecret (Optional) A Secret defined for a registered application which has been granted permission to the database defined in the AADPasswordConnectionString. {Secret}
    AzureKeyVaultURL (Optional) Azure Key Vault Identifier URL https://{keyvaultname}.vault.azure.net/
    AzureKeyVaultTenantId (Optional) The Azure Active Directory tenant (directory) Id of the service principal. {Tenant ID of Active Directory}
    SupportsIntegratedSecurity (Optional) Whether or not the USER running tests has integrated security access to the target SQL Server. true OR false
    LocalDbAppName (Optional) If Local Db Testing is supported, this property configures the name of Local DB App instance available in client environment. Empty string value disables Local Db testing. Name of Local Db App to connect to.
    LocalDbSharedInstanceName (Optional) If LocalDB testing is supported and the instance is shared, this property configures the name of the shared instance of LocalDB to connect to. Name of shared instance of LocalDB.
    FileStreamDirectory (Optional) If File Stream is enabled on SQL Server, pass local directory path to be used for setting up File Stream enabled database. D:\\escaped\\absolute\\path\\to\\directory\\
    UseManagedSNIOnWindows (Optional) Enables testing with Managed SNI on Windows true OR false
    DNSCachingConnString Connection string for a server that supports DNS Caching
    EnclaveAzureDatabaseConnString (Optional) Connection string for Azure database with enclaves
    ManagedIdentitySupported (Optional) When set to false Managed Identity related tests won't run. The default value is true.
    IsManagedInstance (Optional) When set to true TVP related tests will use on non-Azure bs files to compare test results. this is needed when testing against Managed Instances or TVP Tests will fail on Test set 3. The default value is false.
    PowerShellPath The full path to PowerShell.exe. This is not required if the path is present in the PATH environment variable. D:\\escaped\\absolute\\path\\to\\PowerShell.exe

Commands to run Manual Tests

  • Windows (netfx x86):
dotnet test "src\Microsoft.Data.SqlClient\tests\ManualTests\Microsoft.Data.SqlClient.ManualTesting.Tests.csproj" -p:Platform="x86" -p:Configuration="Release" -p:TestTargetOS="Windowsnetfx" --no-build -v n --filter "category!=nonnetfxtests&category!=failing&category!=nonwindowstests"
  • Windows (netfx x64):
dotnet test "src\Microsoft.Data.SqlClient\tests\ManualTests\Microsoft.Data.SqlClient.ManualTesting.Tests.csproj" -p:Platform="x64" -p:Configuration="Release" -p:TestTargetOS="Windowsnetfx" --no-build -v n --filter "category!=nonnetfxtests&category!=failing&category!=nonwindowstests"
  • Windows (netfx):
dotnet test "src\Microsoft.Data.SqlClient\tests\ManualTests\Microsoft.Data.SqlClient.ManualTesting.Tests.csproj" -p:Platform="AnyCPU" -p:Configuration="Release" -p:TestTargetOS="Windowsnetfx" --no-build -v n --filter "category!=nonnetfxtests&category!=failing&category!=nonwindowstests"
  • Windows (netcoreapp):
dotnet test "src\Microsoft.Data.SqlClient\tests\ManualTests\Microsoft.Data.SqlClient.ManualTesting.Tests.csproj" -p:Platform="AnyCPU" -p:Configuration="Release" -p:TestTargetOS="Windowsnetcoreapp" --no-build -v n --filter "category!=nonnetcoreapptests&category!=failing&category!=nonwindowstests"
  • Unix (netcoreapp):
dotnet test "src/Microsoft.Data.SqlClient/tests/ManualTests/Microsoft.Data.SqlClient.ManualTesting.Tests.csproj" -p:Platform="AnyCPU" -p:Configuration="Release" -p:TestTargetOS="Unixnetcoreapp" --no-build -v n --filter "category!=nonnetcoreapptests&category!=failing&category!=nonlinuxtests&category!=nonuaptests"

Run A Single Test

dotnet test "src\Microsoft.Data.SqlClient\tests\ManualTests\Microsoft.Data.SqlClient.ManualTesting.Tests.csproj" -p:Platform="AnyCPU" -p:Configuration="Release" -p:TestTargetOS="Windowsnetcoreapp" --no-build -v n --filter "FullyQualifiedName=Microsoft.Data.SqlClient.ManualTesting.Tests.AlwaysEncrypted.CspProviderExt.TestKeysFromCertificatesCreatedWithMultipleCryptoProviders"

Testing with Custom ReferenceType

Tests can be built and run with custom "Reference Type" property that enables different styles of testing:

  • "Project" => Build and run tests with Microsoft.Data.SqlClient as Project Reference
  • "Package" => Build and run tests with Microsoft.Data.SqlClient as Package Reference with configured "TestMicrosoftDataSqlClientVersion" in "Versions.props" file.
  • "NetStandard" => Build and run tests with Microsoft.Data.SqlClient as Project Reference via .NET Standard Library
  • "NetStandardPackage" => Build and run tests with Microsoft.Data.SqlClient as Package Reference via .NET Standard Library

************** IMPORTANT NOTE BEFORE PROCEEDING WITH "PACKAGE" AND "NETSTANDARDPACKAGE" REFERENCE TYPES *************** CREATE A NUGET PACKAGE WITH BELOW COMMAND AND ADD TO LOCAL FOLDER + UPDATE NUGET CONFIG FILE TO READ FROM THAT LOCATION

 msbuild -p:configuration=Release

A non-AnyCPU platform reference can only be used with package and NetStandardPackage reference types. Otherwise, the specified platform will be replaced with AnyCPU in the build process.

Building Tests with Reference Type

For .NET, all 4 reference types are supported:

msbuild -t:BuildTestsNetCore -p:ReferenceType=Project
# Default setting uses Project Reference.

msbuild -t:BuildTestsNetCore -p:ReferenceType=Package

msbuild -t:BuildTestsNetCore -p:ReferenceType=NetStandard

msbuild -t:BuildTestsNetCore -p:ReferenceType=NetStandardPackage

For .NET Framework, below reference types are supported:

msbuild -t:BuildTestsNetFx -p:ReferenceType=Project
# Default setting uses Project Reference.

msbuild -t:BuildTestsNetFx -p:ReferenceType=Package

Running Tests with Reference Type

Provide property to dotnet test commands for testing desired reference type.

dotnet test -p:ReferenceType=Project ...

Testing with Custom TargetFramework (traditional)

Tests can be built and run with custom Target Frameworks. See the below examples.

Building Tests with custom target framework

msbuild -t:BuildTestsNetFx -p:TargetNetFxVersion=net462
# Build the tests for custom TargetFramework (.NET Framework)
# Applicable values: net462 (Default) | net47 | net471  net472 | net48 | net481
msbuild -t:BuildTestsNetCore -p:TargetNetCoreVersion=net6.0
# Build the tests for custom TargetFramework (.NET)
# Applicable values: net6.0 | net8.0

Running Tests with custom target framework (traditional)

dotnet test -p:TargetNetFxVersion=net462 ...
# Use above property to run Functional Tests with custom TargetFramework (.NET Framework)
# Applicable values: net462 (Default) | net47 | net471  net472 | net48 | net481

dotnet test -p:TargetNetCoreVersion=net6.0 ...
# Use above property to run Functional Tests with custom TargetFramework (.NET)
# Applicable values: net6.0 | net8.0

Using Managed SNI on Windows

Managed SNI can be enabled on Windows by enabling the below AppContext switch:

Switch.Microsoft.Data.SqlClient.UseManagedNetworkingOnWindows

Set truncation on for scaled decimal parameters

Scaled decimal parameter truncation can be enabled by enabling the below AppContext switch:

Switch.Microsoft.Data.SqlClient.TruncateScaledDecimal

Enabling row version null behavior

SqlDataReader returns a DBNull value instead of an empty byte[]. To enable the legacy behavior, you must enable the following AppContext switch on application startup:

Switch.Microsoft.Data.SqlClient.LegacyRowVersionNullBehavior

Suppressing TLS security warning

When connecting to a server, if a protocol lower than TLS 1.2 is negotiated, a security warning is output to the console. This warning can be suppressed on SQL connections with Encrypt = false by enabling the following AppContext switch on application startup:

Switch.Microsoft.Data.SqlClient.SuppressInsecureTLSWarning

Debugging SqlClient on Linux from Windows

For enhanced developer experience, we support debugging SqlClient on Linux from Windows, using the project "Microsoft.Data.SqlClient.DockerLinuxTest" that requires "Container Tools" to be enabled in Visual Studio. You may import configuration: VS19Components.vsconfig if not enabled already.

This project is also included in docker-compose.yml to demonstrate connectivity with SQL Server docker image.

To run the same:

  1. Build the Solution in Visual Studio

  2. Set docker-compose as Startup Project

  3. Run "Docker-Compose" launch configuration.

  4. You will see similar message in Debug window:

    Connected to SQL Server v15.00.4023 from Unix 4.19.76.0
The program 'dotnet' has exited with code 0 (0x0).

  5. Now you can write code in Program.cs to debug SqlClient on Linux!

Troubleshooting Docker issues

There may be times where connection cannot be made to SQL Server, we found below ideas helpful:

  • Clear Docker images to create clean image from time-to-time, and clear docker cache if needed by running docker system prune in Command Prompt.

  • If you face Microsoft.Data.SqlClient.SNI.dll not found errors when debugging, try updating the below properties in the netcore\Microsoft.Data.SqlClient.csproj file and try again:

      <OSGroup>Unix</OSGroup>
  <TargetsWindows>false</TargetsWindows>
  <TargetsUnix>true</TargetsUnix>

Collecting Code Coverage

Using VSTest

dotnet test <test_properties...> --collect:"Code Coverage"

Using Coverlet Collector

dotnet test <test_properties...> --collect:"XPlat Code Coverage"

Run Performance Tests

Running Performance test project directly

Project location from Root: src\Microsoft.Data.SqlClient\tests\PerformanceTests\Microsoft.Data.SqlClient.PerformanceTests.csproj Configure runnerconfig.json file with connection string and preferred settings to run Benchmark Jobs.

cd src\Microsoft.Data.SqlClient\tests\PerformanceTests
dotnet run -c Release -f net6.0|net8.0

Only "Release Configuration" applies to Performance Tests