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//= require jquery
//= require smart_interval
(() => {
const DEFAULT_MAX_INTERVAL = 100;
const DEFAULT_STARTING_INTERVAL = 5;
const DEFAULT_SHORT_TIMEOUT = 75;
const DEFAULT_LONG_TIMEOUT = 1000;
const DEFAULT_INCREMENT_FACTOR = 2;
function createDefaultSmartInterval(config) {
const defaultParams = {
callback: () => {},
startingInterval: DEFAULT_STARTING_INTERVAL,
maxInterval: DEFAULT_MAX_INTERVAL,
incrementByFactorOf: DEFAULT_INCREMENT_FACTOR,
delayStartBy: 0,
lazyStart: false,
};
if (config) {
_.extend(defaultParams, config);
}
return new gl.SmartInterval(defaultParams);
}
describe('SmartInterval', function () {
describe('Increment Interval', function () {
beforeEach(function () {
this.smartInterval = createDefaultSmartInterval();
});
it('should increment the interval delay', function (done) {
const interval = this.smartInterval;
setTimeout(() => {
const intervalConfig = this.smartInterval.cfg;
const iterationCount = 4;
const maxIntervalAfterIterations = intervalConfig.startingInterval *
Math.pow(intervalConfig.incrementByFactorOf, (iterationCount - 1)); // 40
const currentInterval = interval.getCurrentInterval();
// Provide some flexibility for performance of testing environment
expect(currentInterval).toBeGreaterThan(intervalConfig.startingInterval);
expect(currentInterval <= maxIntervalAfterIterations).toBeTruthy();
done();
}, DEFAULT_SHORT_TIMEOUT); // 4 iterations, increment by 2x = (5 + 10 + 20 + 40)
});
it('should not increment past maxInterval', function (done) {
const interval = this.smartInterval;
setTimeout(() => {
const currentInterval = interval.getCurrentInterval();
expect(currentInterval).toBe(interval.cfg.maxInterval);
done();
}, DEFAULT_LONG_TIMEOUT);
});
});
describe('Public methods', function () {
beforeEach(function () {
this.smartInterval = createDefaultSmartInterval();
});
it('should cancel an interval', function (done) {
const interval = this.smartInterval;
setTimeout(() => {
interval.cancel();
const intervalId = interval.state.intervalId;
const currentInterval = interval.getCurrentInterval();
const intervalLowerLimit = interval.cfg.startingInterval;
expect(intervalId).toBeUndefined();
expect(currentInterval).toBe(intervalLowerLimit);
done();
}, DEFAULT_SHORT_TIMEOUT);
});
it('should resume an interval', function (done) {
const interval = this.smartInterval;
setTimeout(() => {
interval.cancel();
interval.resume();
const intervalId = interval.state.intervalId;
expect(intervalId).toBeTruthy();
done();
}, DEFAULT_SHORT_TIMEOUT);
});
});
describe('DOM Events', function () {
beforeEach(function () {
// This ensures DOM and DOM events are initialized for these specs.
fixture.set('<div></div>');
this.smartInterval = createDefaultSmartInterval();
});
it('should pause when page is not visible', function (done) {
const interval = this.smartInterval;
setTimeout(() => {
expect(interval.state.intervalId).toBeTruthy();
// simulates triggering of visibilitychange event
interval.state.pageVisibility = 'hidden';
interval.handleVisibilityChange();
expect(interval.state.intervalId).toBeUndefined();
done();
}, DEFAULT_SHORT_TIMEOUT);
});
it('should resume when page is becomes visible at the previous interval', function (done) {
const interval = this.smartInterval;
setTimeout(() => {
expect(interval.state.intervalId).toBeTruthy();
// simulates triggering of visibilitychange event
interval.state.pageVisibility = 'hidden';
interval.handleVisibilityChange();
expect(interval.state.intervalId).toBeUndefined();
// simulates triggering of visibilitychange event
interval.state.pageVisibility = 'visible';
interval.handleVisibilityChange();
expect(interval.state.intervalId).toBeTruthy();
done();
}, DEFAULT_SHORT_TIMEOUT);
});
it('should cancel on page unload', function (done) {
const interval = this.smartInterval;
setTimeout(() => {
$(document).trigger('page:before-unload');
expect(interval.state.intervalId).toBeUndefined();
expect(interval.getCurrentInterval()).toBe(interval.cfg.startingInterval);
done();
}, DEFAULT_SHORT_TIMEOUT);
});
});
});
})(window.gl || (window.gl = {}));
|
