
A unit test generation extension for Visual Studio that aims to always produce code that compiles - covering the basic cases automatically and preparing as much as it can for the complex cases.
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Alternatively see the releases on GitHub:
Demonstrates the tests generated for a type that contains an indexer
public class TypeWithIndexer
{
    public string this[string cookieName]
    {
        get { return "hello"; }
    }
    public string this[string cookieName, int cookieId]
    {
        get { return "hello"; }
        set { }
    }
}
public class TypeWithIndexerTests
{
    private readonly TypeWithIndexer _testClass;
    public TypeWithIndexerTests()
    {
        _testClass = new TypeWithIndexer();
    }
    [Fact]
    public void CanGetIndexerForString()
    {
        _testClass["TestValue534011718"].Should().BeAssignableTo<string>();
        throw new NotImplementedException("Create or modify test");
    }
    [Fact]
    public void CanSetAndGetIndexerForStringAndInt()
    {
        var testValue = "TestValue1657007234";
        _testClass["TestValue237820880", 1002897798].As<object>().Should().BeAssignableTo<string>();
        _testClass["TestValue237820880", 1002897798] = testValue;
        _testClass["TestValue237820880", 1002897798].Should().Be(testValue);
    }
}