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TestModelLoading.cs
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TestModelLoading.cs
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using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using VW;
namespace cs_unittest
{
[TestClass]
public class TestModelLoading : TestBase
{
[TestMethod]
[TestCategory("Vowpal Wabbit/Model Loading")]
public void TestLoadModelCorrupt()
{
#if NETCOREAPP3_0_OR_GREATER
InternalTestModel(Path.Join("model-sets", "7.10.2_corrupted.model"), false);
#else
InternalTestModel(@"model-sets\7.10.2_corrupted.model", false);
#endif
}
[TestMethod]
[TestCategory("Vowpal Wabbit/Model Loading")]
public void TestLoadModel()
{
#if NETCOREAPP3_0_OR_GREATER
InternalTestModel(Path.Join("model-sets", "8.0.0_ok.model"), true);
InternalTestModel(Path.Join("model-sets", "8.0.1.test_named_ok.model"), true);
InternalTestModel(Path.Join("model-sets", "8.0.1_rcv1_ok.model"), true);
InternalTestModel(Path.Join("model-sets", "8.0.1_hash_ok.model"), true);
#else
InternalTestModel(@"model-sets\8.0.0_ok.model", true);
InternalTestModel(@"model-sets\8.0.1.test_named_ok.model", true);
InternalTestModel(@"model-sets\8.0.1_rcv1_ok.model", true);
InternalTestModel(@"model-sets\8.0.1_hash_ok.model", true);
#endif
}
[TestMethod]
[TestCategory("Vowpal Wabbit/Model Loading")]
public void TestLoadModelRandomCorrupt()
{
#if NETCOREAPP3_0_OR_GREATER
InternalTestModelRandomCorrupt(Path.Join("model-sets", "8.0.1.test_named_ok.model"));
//InternalTestModelRandomCorrupt(Path.Join("model-sets", "8.0.1_rcv1_ok.model"));
//InternalTestModelRandomCorrupt(Path.Join("model-sets", "8.0.1_hash_ok.model"));
#else
InternalTestModelRandomCorrupt(@"model-sets\8.0.1.test_named_ok.model");
//InternalTestModelRandomCorrupt(@"model-sets\8.0.1_rcv1_ok.model");
//InternalTestModelRandomCorrupt(@"model-sets\8.0.1_hash_ok.model");
#endif
}
[TestMethod]
[TestCategory("Vowpal Wabbit/Model Loading")]
public void TestLoadModelInMemory()
{
#if NETCOREAPP3_0_OR_GREATER
using (var vw = new VowpalWabbit("-i " + Path.Join("model-sets", "8.0.1_rcv1_ok.model")))
#else
using (var vw = new VowpalWabbit("-i " + @"model-sets\8.0.1_rcv1_ok.model"))
#endif
{
var memStream = new MemoryStream();
vw.SaveModel(memStream);
vw.SaveModel("native.model");
using (var file = File.Create("managed.file.model"))
{
vw.SaveModel(file);
}
var nativeModel = File.ReadAllBytes("native.model");
var managedFileModel = File.ReadAllBytes("managed.file.model");
var managedModel = memStream.ToArray();
Assert.IsTrue(nativeModel.SequenceEqual(managedModel));
Assert.IsTrue(nativeModel.SequenceEqual(managedFileModel));
}
}
[TestMethod]
[TestCategory("Vowpal Wabbit/Model Loading")]
public void TestID()
{
using (var vw = new VowpalWabbit("--id abc"))
{
Assert.AreEqual("abc", vw.ID);
vw.SaveModel("model");
vw.ID = "def";
vw.SaveModel("model.TestID");
}
using (var vw = new VowpalWabbit("-i model"))
{
Assert.AreEqual("abc", vw.ID);
}
using (var vw = new VowpalWabbit("-i model.TestID"))
{
Assert.AreEqual("def", vw.ID);
}
using (var vwm = new VowpalWabbitModel("-i model.TestID"))
{
Assert.AreEqual("def", vwm.ID);
using (var vw = new VowpalWabbit(new VowpalWabbitSettings { Model = vwm }))
{
Assert.AreEqual("def", vw.ID);
Assert.AreEqual(vwm.ID, vw.ID);
}
}
}
[TestMethod]
[TestCategory("Vowpal Wabbit/Model Loading")]
public void TestEmptyID()
{
using (var vw = new VowpalWabbit("-l 1"))
{
Assert.AreEqual(string.Empty, vw.ID);
vw.SaveModel("model");
}
using (var vw = new VowpalWabbit("-f model"))
{
Assert.AreEqual(string.Empty, vw.ID);
}
}
[TestMethod]
[TestCategory("Vowpal Wabbit/Model Loading")]
public void TestReload()
{
using (var vw = new VowpalWabbit(""))
{
vw.SaveModel("model");
vw.Reload();
}
using (var vw = new VowpalWabbit(""))
{
vw.ID = "def";
vw.SaveModel("model.TestReload");
vw.Reload();
Assert.AreEqual("def", vw.ID);
}
}
private void InternalTestModel(string modelFile, bool shouldPass)
{
bool passed = false;
try
{
using (var vw = new VowpalWabbitModel(string.Format("--quiet -t -i {0}", modelFile)))
{
// should only reach this point if model is valid
passed = true;
}
}
catch (VowpalWabbitException ex)
{
Assert.IsTrue(ex.Message.Contains("corrupted"));
}
if (shouldPass)
{
Assert.IsTrue(passed);
}
}
private void InternalTestModelRandomCorrupt(string modelFile)
{
const int numBytesToCorrupt = 10;
var rand = new Random(0);
byte[] modelBytes = File.ReadAllBytes(modelFile);
for (int i = 0; i < 100; i++)
{
var corruptBytes = new byte[modelBytes.Length];
Array.Copy(modelBytes, corruptBytes, corruptBytes.Length);
for (int j = 0; j < numBytesToCorrupt; j++)
{
corruptBytes[rand.Next(corruptBytes.Length)] = (byte)rand.Next(byte.MaxValue);
}
try
{
using (var modelStream = new MemoryStream(corruptBytes))
using (var vw = new VowpalWabbitModel(new VowpalWabbitSettings("--quiet -t") { ModelStream = modelStream }))
{
// chances of reaching this point after reading a corrupt model are low
Assert.IsTrue(false);
}
}
catch (Exception) // an exception should be caught unless AV is encountered in which case the test will fail
{
Assert.IsTrue(true);
}
}
}
}
}