Key.cs

using System.Text.Json;
using Blazored.SessionStorage.JsonConverters;
using Blazored.SessionStorage.Serialization;
using Blazored.SessionStorage.StorageOptions;
using Blazored.SessionStorage.TestExtensions;
using Blazored.SessionStorage.Tests.TestAssets;
using Microsoft.Extensions.Options;
using Moq;
using Xunit;

namespace Blazored.SessionStorage.Tests.SessionStorageServiceTests;

public class Key
{
    private readonly SessionStorageService _sut;

    public Key()
    {
        var mockOptions = new Mock<IOptions<SessionStorageOptions>>();
        var jsonOptions = new JsonSerializerOptions();
        jsonOptions.Converters.Add(new TimespanJsonConverter());
        mockOptions.Setup(u => u.Value).Returns(new SessionStorageOptions());
        IJsonSerializer serializer = new SystemTextJsonSerializer(mockOptions.Object);
        IStorageProvider storageProvider = new InMemoryStorageProvider();
        _sut = new SessionStorageService(storageProvider, serializer);
    }

    [Fact]
    public void ReturnsNameOfKeyAtIndex_When_KeyExistsInStore()
    {
        // Arrange
        const string key1 = "TestKey1";
        const string key2 = "TestKey2";
            
        var item1 = new TestObject(1, "Jane Smith");
        var item2 = new TestObject(2, "John Smith");
            
        _sut.SetItem(key1, item1);
        _sut.SetItem(key2, item2);
            
        // Act
        var keyName = _sut.Key(1);

        // Assert
        Assert.Equal(key2, keyName);
    }

    [Fact]
    public void ReturnsNull_When_KeyDoesNotExistInStore()
    {
        // Arrange
        var item1 = new TestObject(1, "Jane Smith");
        _sut.SetItem("TestKey1", item1);
            
        // Act
        var keyName = _sut.Key(1);

        // Assert
        Assert.Null(keyName);
    }
}