Add tests for node bindings.

test/nodejs/route.js

@@ -606,3 +606,51 @@ test('route: route in Monaco without motorways', function(assert) {
     });
 });
 
+
+test('route: throws on invalid waypoints values needs at least two', function (assert) {
+    assert.plan(1);
+    var osrm = new OSRM(monaco_path);
+    var options = {
+        steps: true,
+        coordinates: three_test_coordinates,
+        waypoints: [0]
+    };
+    assert.throws(function () { osrm.route(options, function (err, response) { }); },
+        'At least two waypoints must be provided');
+});
+
+test('route: throws on invalid waypoints values, needs first and last coordinate indices', function (assert) {
+    assert.plan(1);
+    var osrm = new OSRM(monaco_path);
+    var options = {
+        steps: true,
+        coordinates: three_test_coordinates,
+        waypoints: [1, 2]
+    };
+    assert.throws(function () { osrm.route(options, function (err, response) { console.log(err); }); },
+        'First and last waypoints values must correspond to first and last coordinate indices');
+});
+
+test('route: throws on invalid waypoints values, order matters', function (assert) {
+    assert.plan(1);
+    var osrm = new OSRM(monaco_path);
+    var options = {
+        steps: true,
+        coordinates: three_test_coordinates,
+        waypoints: [2, 0]
+    };
+    assert.throws(function () { osrm.route(options, function (err, response) { console.log(err); }); },
+        'First and last waypoints values must correspond to first and last coordinate indices');
+});
+
+test('route: throws on invalid waypoints values, waypoints must correspond with a coordinate index', function (assert) {
+    assert.plan(1);
+    var osrm = new OSRM(monaco_path);
+    var options = {
+        steps: true,
+        coordinates: three_test_coordinates,
+        waypoints: [0, 3, 2]
+    };
+    assert.throws(function () { osrm.route(options, function (err, response) { console.log(err); }); },
+        'Waypoints must correspond with the index of an input coordinate');
+});