public void basic_add_package()
{
PackageInfo pInfo0 = PLevel0V1[0];
PackageInfo pInfo1 = PLevel0V1[1];
PackageInfo pInfo2 = PLevel0V1[2];
var db = new PackageDB();
db.Instances.Should().BeEmpty();
db.GetInstances(T0).Should().BeEmpty();
db = db.Add(TestHelper.Monitor, pInfo0);
db.Add(TestHelper.Monitor, pInfo0).Should().BeSameAs(db);
db.Instances.Should().HaveCount(1);
var p0 = db.Instances[0];
db.Find(pInfo0.Key).Should().BeSameAs(p0);
db.Find(pInfo1.Key).Should().BeNull();
db.Find(pInfo2.Key).Should().BeNull();
db.GetInstances(T0).SequenceEqual(new[] { p0 }).Should().BeTrue();
db = db.Add(TestHelper.Monitor, pInfo2);
db.Instances.Should().HaveCount(2);
var p2 = db.Instances[1];
db.Find(pInfo0.Key).Should().BeSameAs(p0);
db.Find(pInfo1.Key).Should().BeNull();
db.Find(pInfo2.Key).Should().BeSameAs(p2);
db.GetInstances(T0).SequenceEqual(new[] { p0, p2 }).Should().BeTrue();
db = db.Add(TestHelper.Monitor, pInfo1);
db.Instances.Should().HaveCount(3);
var p1 = db.Instances[1];
db.Find(pInfo0.Key).Should().BeSameAs(p0);
db.Find(pInfo1.Key).Should().BeSameAs(p1);
db.Find(pInfo2.Key).Should().BeSameAs(p2);
db.GetInstances(T0).SequenceEqual(new[] { p0, p1, p2 }).Should().BeTrue();
db.GetInstances(T1).Should().BeEmpty();
db.FindFeed("T0:F0").GetInstances(T0).SequenceEqual(db.GetInstances(T0)).Should().BeTrue();
db.FindFeed("T0:F1").Should().BeNull();
}