const string book1Page2 = "Book 1 Page 2";
const string book2Page1 = "Book 2 Page 1";

var list = new[]
{
    book1Page2,
    book2Page1
};

var actual = await list.SimplifiedSearchAsync("book 2");

var actual1 = actual[0];
Assert.Equal(book2Page1, actual1);

Assert.True(actual.Count >= 2, "Did not get a second result");
var actual2 = actual[1];
Assert.Equal(book1Page2, actual2);

const string asciiName = "Nina";
const string accentedName = "Niña";

var list = new[]
{
    asciiName,
    accentedName
};

var actual = await list.SimplifiedSearchAsync(accentedName);

var actual1 = actual[0];
Assert.Equal(accentedName, actual1);

private static List<string> GetSampleData()
{
    var data = new List<string>();
    data.Add("Internals");
    data.Add("Super internal");
    data.Add("Extra Internals");
    data.Add("Extra things");
    return data;
}

[Fact]
public async Task Search1_ExpectBestResult()
{
    var data = GetSampleData();
    // here my query is precise enough I would like only one match
    var result = await data.SimplifiedSearchAsync("extra internal"); // add option to only get the "best" match?
    Assert.Collection(result, x => Assert.Equal("Extra Internals", x));
    // FAILS: Collection: ["Extra Internals", "Super internal", "Extra things", "Internals"]
}

[Fact]
public async Task Search2_ExpectBestResult()
{
    var data = GetSampleData();
    // here my query is precise enough I would like only one match
    var result = await data.SimplifiedSearchAsync("internals"); // add option to only get the "best" match?
    Assert.Collection(result, x => Assert.Equal("Internals", x));
    // FAILS: Collection: ["Internals", "Extra Internals", "Super internal"]
}

[Fact]
public async Task Search3_NoBestResult()
{
    var data = GetSampleData();
    // here my query is not precise enough to find one best match
    var result = await data.SimplifiedSearchAsync("extra");
    Assert.Collection(
        result,
        x => Assert.Equal("Extra Internals", x),
        x => Assert.Equal("Extra things", x));
}