public void testDifferenceFunction() {
XPathEvaluator xe = new XPathEvaluator();
assertEquals(xe.evaluateList("g:difference(g:append(1,2,3,4),3,4)").size(), 2);
assertTrue(xe.evaluateList("g:difference(g:append(1,2,3,4),3,4)").contains(1.0));
assertTrue(xe.evaluateList("g:difference(g:append(1,2,3,4),3,4)").contains(2.0));
assertEquals(xe.evaluateList("g:difference(g:append(1,2,3,4),g:append(1,2))").size(), 2);
assertTrue(xe.evaluateList("g:difference(g:append(1,2,3,4),g:append(1,2))").contains(3.0));
assertTrue(xe.evaluateList("g:difference(g:append(1,2,3,4),g:append(1,2))").contains(4.0));
assertEquals(xe.evaluateList("g:difference(1,2)").size(), 1);
assertEquals(xe.evaluateList("g:difference(1,1)").size(), 0);
}
public void testAddEdgeFunction() {
Graph graph = new TinkerGraph();
XPathEvaluator xe = new XPathEvaluator();
xe.setVariable(Tokens.GRAPH_VARIABLE, graph);
xe.setVariable("$v", graph.addVertex('1'));
xe.setVariable("$u", graph.addVertex('2'));
assertEquals(count(graph.getVertices()), 2);
assertEquals(count(graph.getEdges()), 0);
xe.evaluateList("g:add-e($v,'knows1',$u)");
assertEquals(count(graph.getEdges()), 1);
xe.evaluateList("g:add-e('42', $v,'knows2',$u)");
assertEquals(count(graph.getEdges()), 2);
xe.evaluateList("g:add-e($_g, $v,'knows3',$u)");
assertEquals(count(graph.getEdges()), 3);
xe.evaluateList("g:add-e($_g, '52', $v,'knows4',$u)");
assertEquals(count(graph.getEdges()), 4);
try {
xe.evaluateList("g:add-e($_g, '52', $v,'knows4',$u,10)");
assertTrue(false);
} catch (EvaluationException e) {
assertTrue(true);
}
}