using NUnitFramework; 

namespace Prime.UnitTests.Services;

[TestFixture] // Declares a class that contains unit tests.
public class PrimeService_IsPrimeShould
{
    private PrimeService _primeService;

    [SetUp] // Equivalent to a test class constructor.
    public void SetUp()
    {
        _primeService = new PrimeService();
    }

    [Test] // Declares a test method.
    public void IsPrime_InputIs1_ReturnFalse()
    {
        var result = _primeService.IsPrime(1);

        Assert.IsFalse(result, "1 should not be prime");
    }

    // The values of the TestCase attributes are passed to the value parameter of this test method.
    [TestCase(-1)]
    [TestCase(0)]
    [TestCase(1)]
    public void IsPrime_ValuesLessThan2_ReturnFalse(int value)
    {
        var result = _primeService?.IsPrime(value);

        Assert.IsFalse(result, $"{value} should not be prime");
    }
}