Fix node cancellation tests

src/node/test/surface_test.js

@@ -1334,14 +1334,14 @@ describe('Cancelling surface client', function() {
   });
   it('Should correctly cancel a unary call', function(done) {
     var call = client.div({'divisor': 0, 'dividend': 0}, function(err, resp) {
-      assert.strictEqual(err.code, surface_client.status.CANCELLED);
+      assert.strictEqual(err.code, grpc.status.CANCELLED);
       done();
     });
     call.cancel();
   });
   it('Should correctly cancel a client stream call', function(done) {
     var call = client.sum(function(err, resp) {
-      assert.strictEqual(err.code, surface_client.status.CANCELLED);
+      assert.strictEqual(err.code, grpc.status.CANCELLED);
       done();
     });
     call.cancel();
@@ -1350,7 +1350,7 @@ describe('Cancelling surface client', function() {
     var call = client.fib({'limit': 5});
     call.on('data', function() {});
     call.on('error', function(error) {
-      assert.strictEqual(error.code, surface_client.status.CANCELLED);
+      assert.strictEqual(error.code, grpc.status.CANCELLED);
       done();
     });
     call.cancel();
@@ -1359,14 +1359,14 @@ describe('Cancelling surface client', function() {
     var call = client.divMany();
     call.on('data', function() {});
     call.on('error', function(error) {
-      assert.strictEqual(error.code, surface_client.status.CANCELLED);
+      assert.strictEqual(error.code, grpc.status.CANCELLED);
       done();
     });
     call.cancel();
   });
   it('Should be idempotent', function(done) {
     var call = client.div({'divisor': 0, 'dividend': 0}, function(err, resp) {
-      assert.strictEqual(err.code, surface_client.status.CANCELLED);
+      assert.strictEqual(err.code, grpc.status.CANCELLED);
       // Call asynchronously to try cancelling after call is fully completed
       setImmediate(function() {
         assert.doesNotThrow(function() {