Leaking domain knowledge to tests

1.cs

public static class Calculator
{
    public static int Add(int value1, int value2)
    {
        return value1 + value2;
    }
}

2.cs

public class CalculatorTests
{
    [Fact]
    public void Add_two_numbers()
    {
        int value1 = 1;
        int value2 = 3;
        int expected = value1 + value2;

        int actual = Calculator.Add(value1, value2);

        Assert.Equal(expected, actual);
    }
}

3.cs

public class CalculatorTests
{
    [Theory]
    [InlineData(1, 3)]
    [InlineData(11, 33)]
    [InlineData(100, 500)]
    public void Add_two_numbers(int value1, int value2)
    {
        int expected = value1 + value2;

        int actual = Calculator.Add(value1, value2);

        Assert.Equal(expected, actual);
    }
}

4.cs

int expected = value1 + value2;

5.cs

public static int Add(int value1, int value2)
{
    return value1 + value2;
}

6.cs

public class CalculatorTests
{
    [Fact]
    public void Add_two_numbers()
    {
        Assert.True(true);
    }
}

7.cs

public class CalculatorTests
{
    [Theory]
    [InlineData(1, 3, 4)]
    [InlineData(11, 33, 44)]
    [InlineData(100, 500, 600)]
    public void Add_two_numbers(int value1, int value2, int expected)
    {
        int actual = Calculator.Add(value1, value2);
        Assert.Equal(expected, actual);
    }
}