public void testFindMatch() {
NodeRelation nodeRel = translate1("?x rdf:type ex:Class1", "engine/type-bridge.n3");
Relation r = nodeRel.baseRelation();
assertEquals(Collections.singleton(table1), r.tables());
assertEquals(Collections.singleton(table1id), r.projections());
assertEquals(Expression.TRUE, r.condition());
assertEquals(AliasMap.NO_ALIASES, r.aliases());
assertEquals(Collections.singleton(x), nodeRel.variables());
assertEquals("URI(Pattern(http://example.org/res@@table1.id@@))",
nodeRel.nodeMaker(x).toString());
}