public void AddListAndKeepingReferenceToStart()
{
var rdf = new RdfData(new NodeFactory());
var g = rdf.GetGraph(rdf.Uri("graph:/g1"))
.Update
.Let(out var graphId);
//(http://www.snee.com/bobdc.blog/2014/04/rdf-lists-and-sparql.html)
// x:sub rdfs:first "one"
// x.sub rdfs:rest _:1
// _:1 rdfs:first "two"
// _:1 rdfs:rest _:2
// _:2 rdfs:first "three"
// _:2 rdfs:rest rsf:nil
g.For(rdf.Uri("x:sub"))
.Let(out var listStart)
.List(rdf.New("one"), rdf.New("two"), rdf.New("three"))
.With(rdf.Uri("x:p")).Add(rdf.New("Extra data on last item"))
//And jump back to starting subject.
.ThenFor(listStart);
var listModel = new RdfsList(rdf, rdf.GetGraph(graphId));
var items = listModel.GetList(listStart)
.ToList();
Assert.AreEqual(3, items.Count, "Got 3 items from list");
Assert.AreEqual("two", items[1].Value <string>(), "2nd is as expected");
}
public void QueryIncludesOtherGraphs()
{
var rdf = new RdfData(new NodeFactory());
var g1 = rdf.GetGraph(rdf.BlankSelf());
g1.Assert(rdf.Uri("app:test"), rdf.Uri("app:name"),
rdf.New("baseName"));
var g2 = rdf.GetGraph(rdf.BlankSelf());
g2.Assert(rdf.Uri("app:test"), rdf.Uri("app:name"),
rdf.New("mainName"));
var target = rdf.GetGraph(g2.Id, g1.Id);
var names = target.Query.With(rdf, "app:name").ToArray();
Assert.AreEqual(2, names.Length, "Finds both entries");
//Get the name value.
var name = names
.Get <string>()
.FirstOrNull();
Assert.AreEqual("mainName", name, "Main graph is first in the query");
}
public void BuildingAChain()
{
var rdf = new RdfData(new NodeFactory());
var g = rdf.GetBlankGraph().Update
.Let(out var graphId);
// x:joe x:phone _:auto1
// _:auto1 x:home "a"
// _:auto1 x:home "123"^^int
g.For(rdf.Uri("x:joe"))
.With(rdf.Uri("x:phone"))
.To(rdf.Blank(graphId))
.With(rdf.Uri("x:home"))
.Add(rdf.New("123"), rdf.New(123));
Assert.AreEqual(3, rdf.Query.Count);
//now query data.
var graph = rdf.Query.From(graphId).ToList();
var linkToData = graph.LinksFor(rdf.Uri("x:joe")).Single();
Assert.AreEqual(rdf.Uri("x:phone"), linkToData.Predicate, "Got Joe's phone entries");
var properties = graph.PropertiesFor((Node <UriOrBlank>)linkToData.Object).ToList();
Assert.AreEqual(2, properties.Count, "Expected 2 entries");
var thePhoneNumber = properties.Select(x => x.Object.As <int>())
.Single(x => !(x is null))
?? throw new Exception("Didn't find phone number");
Assert.AreEqual(123, thePhoneNumber.Value);
}
public async Task WriteRead()
{
var file = new FileInfo(
Path.Combine(Files.AppData.NqFileTests.FullName,
nameof(WriteRead) + ".nt"));
var rdf = new RdfData(new NodeFactory());
var g = rdf.GetFullGraph("graph:1")
.Assert(rdf.Uri("sub1:/"), rdf.Uri("pred1:/"), rdf.New("basic text"));
file.Directory.EnsureDelete();
var t = new NTripleFile(file);
await t.Write(g);
file.Refresh();
Assert.IsTrue(file.Exists);
Assert.IsTrue(file.Length > 0, "wrote some data");
//copy current so it doesn't delete.
var gCopy = g.Query.ToList();
g.Clear();
await t.Read(g);
IEqualityComparer <Quad> eq = new SameQuad();
var gDiffs = g.Query.Except(gCopy, eq).ToList();
Assert.IsFalse(gDiffs.Any(), "No difference");
}
public void HasCrossGraphBlank()
{
var rdf = new RdfData(new NodeFactory());
var g1 = rdf.GetGraph(rdf.BlankSelf());
var g2 = rdf.GetFullGraph("app:test");
var who = rdf.Uri("app:who");
var b1 = g1.Blank("b1");
//b1 in g1 points to blank in g2 for details.
g1.Assert(b1, who, g2.Id);
//b1 has name fred.
var name = rdf.Uri("app:name");
g2.Assert(b1, name, rdf.New("Fred"));
//Now find via cross graph query.
var otherG = g1.Query.Single(x =>
x.Predicate == who &&
x.Object is Node <UriOrBlank>)
.Object.Cast <UriOrBlank>();
var myName = rdf.GetGraph(otherG).Query.Where(x =>
x.Subject == b1 &&
x.Predicate == name)
.Get <string>()
.Single();
Assert.AreEqual("Fred", myName);
}
public void RdfUpdate_AvailableInGraph()
{
var f = new NodeFactory();
var rdf = new RdfData(f);
var g1 = f.BlankSelf();
var g2 = f.BlankSelf();
var graphPreUpdates = rdf.GetGraph(g1, g2);
//add directly via rdf data.
var sub = rdf.Uri("x:/s1");
var pred = rdf.Uri("x:/p1");
var val = rdf.New("text");
rdf.Assert(g1, sub, pred, val);
rdf.Assert(g2, sub, pred, val);
//immediately have the owned quad,
//but not the data from other graph.
Assert.AreEqual(1, graphPreUpdates.Query.Count, "Got the new entry");
var graphReInit = rdf.GetGraph(g1, g2);
Assert.AreEqual(2, graphReInit.Query.Count, "Re-access graph gets latest");
}
public void GraphIds_Ordered()
{
var rdf = new RdfData(new NodeFactory());
var g1 = rdf.BlankSelf("test");
rdf.Assert(g1, rdf.Blank(g1), rdf.Uri("a:pred"), rdf.New(123));
var graphs = rdf.GraphIds;
Assert.AreEqual(3, graphs.Length);
Assert.AreEqual(rdf.System, graphs.ElementAt(0));
Assert.AreEqual(rdf.Default, graphs.ElementAt(1));
}
public void WriteTripleData()
{
var rdf = new RdfData(new NodeFactory());
var target = new NTripleFile(Files.AppDataDir.GetFile(
nameof(NTripleFileTests), nameof(WriteTripleData) + ".nt"));
var g = rdf.BlankSelf("g1");
rdf.Assert(g,
rdf.Uri("x:sub1"),
rdf.Uri("x:age"),
rdf.New(23));
target.Write(rdf.GetGraph(g)).Wait();
}
public void ClearGraph()
{
var data = new RdfData(new NodeFactory());
data.Update.From("sys:/data/", out _)
.For("sub:s1", out _)
.With("x:/p1", out _).Add(123);
var g = data.GetGraph(data.BlankSelf())
.Assert(data.Uri("x:/s1"),
data.Uri("p:/1"),
data.New("text"));
Assert.AreEqual(2, data.Query.Count, "have the nodes");
g.Clear();
Assert.AreEqual(0, g.Query.Count, "no graph nodes");
Assert.AreEqual(1, data.Query.Count, "still have other data");
}
public void PrintLiteral()
{
var rdf = new RdfData(new NodeFactory());
var g = rdf.GetBlankGraph();
var expected = "_:g <app:test> \"Literal\\rMultiline\\\\\" .";
g.Assert(g.Blank("g"),
rdf.Uri("app:test"),
rdf.New("Literal\rMultiline\\"));
var target = new NodeWriter(g);
using var wr = new StringWriter();
target.Print(wr);
wr.Flush();
var result = wr.GetStringBuilder().ToString().Trim();
Assert.AreEqual(expected, result);
}
