public void Test1()
{
var list = new IndexedList <ItemMetadata>();
list.AddIndex("BlobRef", (item) => item.BlobRef);
list.AddIndex("Name", (item) => item.Name);
list.AddIndex("Value", (item) => item.Value);
var rand = new Random(2654);
var chances = new List <int> {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3
};
var tags = new Dictionary <string, List <string> >();
tags.Add("Tag", new List <string> {
"Cuba", "pool", "beach", "kids"
});
tags.Add("Camera", new List <string> {
"AndrewsPhone", "JosPhone", "LydiasPhone", "AllansCamera", "PoolesCamera", "JosPhone", "LydiasPhone", "AllansCamera", "PoolesCamera", "JosPhone", "LydiasPhone", "AllansCamera", "PoolesCamera"
});
var rememberedBlobRef = "";
var sw = new Stopwatch();
sw.Start();
for (var i = 1; i <= 1_000_000; ++i)
{
var blobRef = Guid.NewGuid().ToString();
list.Add(new ItemMetadata()
{
BlobRef = blobRef,
Name = "BlobRef",
Value = $"{DateTime.UtcNow.AddDays(rand.Next(-10, 20)).AddHours(rand.Next(-20, 20))}"
});
// remember a random blobRef for lookup later
if (i == 1000)
{
rememberedBlobRef = blobRef;
}
var randomWeightedChance = chances[rand.Next(0, chances.Count)];
for (var j = 0; j < randomWeightedChance; j++)
{
var randomTag = tags.ElementAt(rand.Next(0, tags.Count));
var randomTagValue = randomTag.Value.ElementAt(rand.Next(0, randomTag.Value.Count));
list.Add(new ItemMetadata()
{
BlobRef = blobRef,
Name = randomTag.Key,
Value = randomTagValue
});
}
}
var elapsed = sw.Elapsed.TotalMilliseconds;
Debug.WriteLine($"list loaded {elapsed}ms");
Assert.That(list.Count, Is.EqualTo(1_239_040));
sw.Restart();
var foundBlobRefMatches = list.FindBySingleIndex(new IndexSearch("BlobRef", rememberedBlobRef));
elapsed = sw.Elapsed.TotalMilliseconds;
Debug.WriteLine($"lookup via blobRef index should return at least 1 item in {elapsed}ms");
Assert.That(foundBlobRefMatches.Count(), Is.EqualTo(1));
sw.Restart();
var allitemsWithNameTag = list.FindBySingleIndex(new IndexSearch("Name", "Tag"));
elapsed = sw.Elapsed.TotalMilliseconds;
Debug.WriteLine($"indexed search of all items with a Name:Tag in {elapsed}ms");
Assert.That(allitemsWithNameTag.Count(), Is.EqualTo(119_587));
sw.Restart();
var allitemsWithNameAndValue = list.FindByIntersection(new IndexSearch("Name", "Camera"), new IndexSearch("Value", "AndrewsPhone"));
elapsed = sw.Elapsed.TotalMilliseconds;
Debug.WriteLine($"indexed search of all items with Name:Tag and Value: in {elapsed}ms");
Assert.That(allitemsWithNameAndValue.Count(), Is.EqualTo(9321));
sw.Restart();
var allitemsWithNameBlobRef = list.FindByIndexEvaluateValues(new IndexSearch("Name", "BlobRef"), (v) => (DateTime.Parse(v.Value).Day == DateTime.UtcNow.Day));
elapsed = sw.Elapsed.TotalMilliseconds;
Debug.WriteLine($"indexed search via Name AND Value matching an evaluated predicate {elapsed}ms");
Assert.That(allitemsWithNameBlobRef.Count(), Is.EqualTo(33_166));
}