private static void Main(string[] args)
{
// Create a full text index with default settings
var index = new FullTextIndex <string>();
// Index
index.Index("A", "This is some text associated with A: fizz");
index.Index("B", "Some buzz text for B");
index.Index("C", "Text associated with C is both fizz and buzz");
// Search for text containing both Fizz *and* Buzz
var results = index.Search("Fizz Buzz").ToList();
// Output: Items with both Fizz and Buzz: 1
Console.WriteLine($"Items with both Fizz and Buzz: {results.Count}");
// Search for text containing both Fizz *or* Buzz
results = index.Search("Fizz | Buzz").ToList();
// Outputs: Items with Fizz or Buzz: 3
Console.WriteLine($"Items with Fizz or Buzz: {results.Count}");
}
public async Task ShouldRoundTripIndexStructure()
{
var serializer = new BinarySerializer <string>();
var fileName = Guid.NewGuid().ToString() + ".dat";
using (var stream = File.Open(fileName, FileMode.CreateNew))
{
var stopwatch = Stopwatch.StartNew();
await serializer.SerializeAsync(this.index, stream, false);
this.output.WriteLine($"Serialized in {stopwatch.ElapsedMilliseconds}ms");
stream.Length.Should().BeGreaterThan(4);
var newIndex = new FullTextIndexBuilder <string>().Build();
stream.Position = 0;
stopwatch.Restart();
await serializer.DeserializeAsync(newIndex, stream, false);
this.output.WriteLine($"Deserialized in {stopwatch.ElapsedMilliseconds}ms");
newIndex.IdLookup.GetIndexedItems().Should().BeEquivalentTo(this.index.IdLookup.GetIndexedItems());
newIndex.Count.Should().Be(this.index.Count);
newIndex.Root.ToString().Should().Be(this.index.Root.ToString());
var oldResults = index.Search("test").ToList();
var newResults = newIndex.Search("test").ToList();
oldResults.Should().NotBeEmpty();
newResults.Should().BeEquivalentTo(oldResults);
}
File.Delete(fileName);
}
public void Can_Use_FullTextIndex_Directly()
{
// First we create an instance of FullTextIndex
var index = new FullTextIndex();
// Then we add texts to the index
index.Add(_apodArticles);
// After adding we can Search for texts that match a Lucene query expression
// See https://lucene.apache.org/core/2_9_4/queryparsersyntax.html for a reference on Lucene query syntax
var result = index.Search("magellanic nebula visible in southern skies").ToList();
var expected = 10;
var actual = result.Count > 0 ? result[0] : -1;
Assert.AreEqual<int>(expected, actual); // Article #10 should come up on top
result = index.Search("swift-tuttle comet").ToList();
expected = 0;
actual = result.Count > 0 ? result[0] : -1;
Assert.AreEqual<int>(expected, actual); // Article #0 should come up on top
result = index.Search("china observation station in antartica").ToList();
expected = 14;
actual = result.Count > 0 ? result[0] : -1;
Assert.AreEqual<int>(expected, actual); // Article #14 should come up on top
}
