node-postgres/packages/pg-native/test/cancel.js

var Client = require("../");
var assert = require("assert");

describe("cancel query", function () {
  it("works", function (done) {
    var client = new Client();
    client.connectSync();
    client.query("SELECT pg_sleep(100);", function (err) {
      assert(err instanceof Error);
      client.end(done);
    });
    client.cancel(function (err) {
      assert.ifError(err);
    });
  });

  it("does not raise error if no active query", function (done) {
    var client = new Client();
    client.connectSync();
    client.cancel(function (err) {
      assert.ifError(err);
      done();
    });
  });

  it("raises error if client is not connected", function (done) {
    new Client().cancel(function (err) {
      assert(err, "should raise an error when not connected");
      done();
    });
  });
});