unit TestDataRecord.RawAccess;

interface

uses
    DUnitX.TestFramework,
    Myc.DataRecord;

type
    [TestFixture]
    TTestDataRecordRawAccess = class
    public
        [Test]
        procedure TestRawAccess_Integer;
        [Test]
        procedure TestRawAccess_String;
        [Test]
        procedure TestRawAccess_Interface;
    end;

implementation

uses
    System.Classes;

type
    // A simple interface for testing managed type behavior.
    IMyTestInterface = interface
        function GetValue: integer;
    end;

    // Implementation of the test interface.
    TMyTestInterfaceImpl = class(TInterfacedObject, IMyTestInterface)
    private
        FValue: Integer;
    public
        constructor Create(const AValue: Integer);
        function GetValue: integer;
    end;

constructor TMyTestInterfaceImpl.Create(const AValue: Integer);
begin
    inherited Create;
    FValue := AValue;
end;

function TMyTestInterfaceImpl.GetValue: integer;
begin
    Result := FValue;
end;

procedure TTestDataRecordRawAccess.TestRawAccess_Integer;
var
    rec: TDataRecord;
    field: TDataRecord.IField;
    readValue, newValue: Integer;
begin
    // Arrange: Create a record with an integer field.
    var builder := TDataRecord.CreateBuilder;
    builder.AddField<Integer>('IntField', 123);
    rec := builder.CreateRec;
    field := rec.GetField('IntField');
    Assert.IsNotNull(field, 'Field should exist');

    // Act & Assert (GetRaw): Read the initial value via raw pointer.
    readValue := 0;
    field.GetRaw(@readValue);
    Assert.AreEqual(123, readValue, 'GetRaw should retrieve the correct integer value');

    // Act (SetRaw): Set a new value via raw pointer.
    newValue := 456;
    field.SetRaw(@newValue);

    // Assert: Verify the new value using the typed accessor.
    var typedField := rec.GetField<Integer>('IntField');
    Assert.AreEqual(456, typedField.Value, 'SetRaw should update the integer value correctly');
end;

procedure TTestDataRecordRawAccess.TestRawAccess_Interface;
var
    rec: TDataRecord;
    field: TDataRecord.IField;
    initialObj, readObj, newObj: IMyTestInterface;
begin
    // Arrange: Create a record with an interface field.
    initialObj := TMyTestInterfaceImpl.Create(10);
    var builder := TDataRecord.CreateBuilder;
    builder.AddField<IMyTestInterface>('IField', initialObj);
    rec := builder.CreateRec;
    field := rec.GetField('IField');
    Assert.IsNotNull(field, 'Field should exist');

    // Act & Assert (GetRaw): Read the initial interface via raw pointer.
    readObj := nil;
    field.GetRaw(@readObj);
    Assert.IsNotNull(readObj, 'GetRaw should retrieve a non-nil interface');
    Assert.AreSame(initialObj, readObj, 'GetRaw should retrieve the same interface instance');
    Assert.AreEqual(10, readObj.GetValue, 'Value of retrieved interface should be correct');

    // Act (SetRaw): Set a new interface via raw pointer.
    newObj := TMyTestInterfaceImpl.Create(20);
    field.SetRaw(@newObj);

    // Assert: Verify the new interface is set correctly.
    var typedField := rec.GetField<IMyTestInterface>('IField');
    Assert.AreSame(newObj, typedField.Value, 'SetRaw should update to the new interface instance');
    Assert.AreEqual(20, typedField.Value.GetValue, 'Value of new interface should be correct');
end;

procedure TTestDataRecordRawAccess.TestRawAccess_String;
var
    rec: TDataRecord;
    field: TDataRecord.IField;
    readString, newString: string;
begin
    // Arrange: Create a record with a string field.
    var builder := TDataRecord.CreateBuilder;
    builder.AddField<string>('StrField', 'Hello');
    rec := builder.CreateRec;
    field := rec.GetField('StrField');
    Assert.IsNotNull(field, 'Field should exist');

    // Act & Assert (GetRaw): Read the initial string via raw pointer.
    readString := '';
    field.GetRaw(@readString);
    Assert.AreEqual('Hello', readString, 'GetRaw should retrieve the correct string value');

    // Act (SetRaw): Set a new string via raw pointer.
    newString := 'World';
    field.SetRaw(@newString);

    // Assert: Verify the new string using the typed accessor.
    var typedField := rec.GetField<string>('StrField');
    Assert.AreEqual('World', typedField.Value, 'SetRaw should update the string value correctly');
end;

initialization
    TDUnitX.RegisterTestFixture(TTestDataRecordRawAccess);

end.