levelgraph-n3/test/searchStream_spec.js

LevelGraph plugin that add the ability to load and store n3/turtle files.

var helper = require('./helper'),
    concat = require("concat-stream");

describe("augmented db.searchStream", function() {
  
  var db
    , tj = "@prefix c: <http://example.org/cartoons#>.\n" +
           "c:Tom a c:Cat.\n" +
           "c:Jerry a c:Mouse;\n" +
           "        c:smarterThan c:Tom;\n" +
           "        c:place \"fantasy\".";


  beforeEach(function() {
    db = helper.getDB();
  }); 

  afterEach(function(done) {
    db.close(done);
  });

  it("should generate a n3 triple", function(done) {
    db.n3.put(tj, function() {
      var stream = db.searchStream([{
          subject: db.v("s")
        , predicate: "http://example.org/cartoons#smarterThan"
        , object: db.v("o")
      }], { 
        n3: {
            subject: db.v("o")
          , predicate: "http://example.org/cartoons#dumberThan"
          , object: db.v("s")
        }
      });
      
      stream.pipe(concat({ encoding: 'string' }, function(triples) {
        expect(triples).to.eql("<http://example.org/cartoons#Tom> <http://example.org/cartoons#dumberThan> <http://example.org/cartoons#Jerry>.\n");
        done();
      }));
    });
  });
});