<Query Kind="Expression"/>

System.Environment.Version

var original = Books.First();
var copy = original with { Title = original.Title.ToUpper() };

var expectedEquality = original.Title.Equals(copy.Title, context.StringComparison);

original.Equals(copy).Should().Be(expectedEquality, Reason());

original.GetHashCode()
    .Equals(copy.GetHashCode())
    .Should()
    .Be(expectedEquality, Reason());

[TestFixture]
public class LPRunTests
{
    [OneTimeSetUp]
    public void Init()
    {
        // Check that driver is not installed via NuGet.
        Driver.EnsureNotInstalledViaNuGet("CsvLINQPadDriver");

        // Install driver.
        Driver.InstallWithDepsJson(
            // The directory to copy driver files to.
            "CsvLINQPadDriver",
            // The LINQPad driver files.
            "CsvLINQPadDriver.dll",
            // The test folder path.
            "Tests");
    }

    [Test]
    [TestCaseSource(nameof(TestsData))]
    public async Task Execute_ScriptWithDriverProperties_Success(
        (string linqScriptName,
         string? context,
         ICsvDataContextDriverProperties driverProperties) testData)
    {
        var (linqScriptName, context, driverProperties) = testData;

        // Arrange: Create query connection header. Custom code can be added here.
        var queryConfig = GetQueryHeaders().Aggregate(
            new StringBuilder(),
            (stringBuilder, h) =>
        {
            stringBuilder.AppendLine(h);
            stringBuilder.AppendLine();
            return stringBuilder;
        }).ToString();

        // Arrange: Create test LNQPad script.
        // You can also use LinqScript.FromScript method.
        var linqScript = LinqScript.FromFile(
            $"{linqScriptName}.linq",
            queryConfig);

        // Act: Execute test LNQPad script.
        var (output, error, exitCode) =
            await Runner.ExecuteAsync(linqScript);

        // Assert.
        error.Should().BeNullOrWhiteSpace();
        exitCode.Should().Be(0);

        // Helpers.
        IEnumerable<string> GetQueryHeaders()
        {
            // Connection header.
            yield return ConnectionHeader.Get(
                "CsvLINQPadDriver",
                "CsvLINQPadDriver.CsvDataContextDriver",
                driverProperties,
                "System.Runtime.CompilerServices");

            // FluentAssertions helper.
            yield return
                 "string Reason([CallerLineNumber] int sourceLineNumber = 0) =>" +
                @" $""something went wrong at line #{sourceLineNumber}"";";

            // Test context.
            if (!string.IsNullOrWhiteSpace(context))
            {
                yield return $"var context = {context};";
            }
        }
    }

    private static IEnumerable<
        (string linqScriptName,
         string? context,
         ICsvDataContextDriverProperties driverProperties)> TestsData()
    {
        // Omitted for brevity.
    }
}

[TestFixture]
public class LPRunTests
{
    [Test]
    [Parallelizable(ParallelScope.Children)]
    [TestCaseSource(nameof(ParallelizableTestsData))]
    public void Execute_ScriptWithDriverProperties_Success(
        (string linqScriptName,
         string? context,
         ICsvDataContextDriverProperties driverProperties,
         int index) testData)
    {
        // ...

        // Arrange: Create test LNQPad script.
        // You can also use LinqScript.FromScript method.
        var linqScript = LinqScript.FromFile(
            $"{linqScriptName}.linq",
            queryConfig,
            $"{linqScriptName}_{testData.index}");

        // ...
    }

    private static IEnumerable<
        (string linqScriptName,
         string? context,
         ICsvDataContextDriverProperties driverProperties,
         int index)> TestsData()
    {
        // Omitted for brevity.
    }

    // Parallelized tests data.
    private static IEnumerable<
        (string linqScriptName,
         string? context,
         ICsvDataContextDriverProperties driverProperties,
         int index)> ParallelizableTestsData() =>
        TestsData().AugmentWithFileIndex(
            static testData => testData.linqScriptName,
            static (testData, index) => { testData.index = index; return testData; });
}

// LINQPad.Runtime.dll IConnectionInfo reference:
var connectionInfoMock = new Mock<LINQPad.Extensibility.DataContext.IConnectionInfo>();
var driverProperties   = new DriverProperties(connectionInfoMock.Object);

var driverProperties = Mock.Of<IDriverProperties>(props =>
    props.BoolProp   == true     &&
    props.IntProp    == 42       &&
    props.StringProp == "string"
);