SystemExtensions/SystemExtensions.NetStandard.Security.Tests/CryptoRngProviderTests.cs

using FluentAssertions;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Linq;
using System.Security.Rng;

namespace SystemExtensions.NetStandard.Security.Tests;

[TestClass]
public class CryptoRngProviderTests
{
    private CryptoRngProvider cryptoRngProvider;

    [TestInitialize]
    public void TestInitialize()
    {
        this.cryptoRngProvider = new CryptoRngProvider();
    }

    [TestMethod]
    public void GetBytes_ShouldSetValues()
    {
        var bytes = new byte[100];

        this.cryptoRngProvider.GetBytes(bytes);

        bytes.All(b => b == 0).Should().BeFalse();
    }

    [TestMethod]
    public void GetNonZeroBytes_ShouldSetNonZeroValues()
    {
        var bytes = new byte[100];

        this.cryptoRngProvider.GetNonZeroBytes(bytes);

        bytes.All(b => b != 0).Should().BeTrue();
    }

    [TestMethod]
    public void GetBytes_ShouldReturnBytes()
    {
        var bytes = this.cryptoRngProvider.GetBytes(10);

        bytes.Length.Should().Be(10);
    }

    [TestMethod]
    public void GetNonZeroBytes_ShouldReturnBytes()
    {
        var bytes = this.cryptoRngProvider.GetNonZeroBytes(10);

        bytes.Length.Should().Be(10);
    }
}