@uswds/uswds
Version:
Open source UI components and visual style guide for U.S. government websites
59 lines (50 loc) • 1.73 kB
JavaScript
const sinon = require("sinon");
const assert = require("assert");
const behavior = require("../behavior");
describe("behavior", () => {
it("returns an object", () => {
const component = behavior({});
assert(component && typeof component === "object");
});
it("has on() and off() methods", () => {
const component = behavior({});
assert.strictEqual(typeof component.on, "function");
assert.strictEqual(typeof component.off, "function");
});
describe("behavior.on()", () => {
it("calls init()", () => {
const init = sinon.spy();
behavior({}, { init }).on();
assert(init.calledOnce);
});
it("passes document.body if no target is provided", () => {
const init = sinon.spy();
behavior({}, { init }).on();
assert(init.calledWithExactly(document.body));
});
it("passes the right element if a target is provided", () => {
const init = sinon.spy();
const el = document.createElement("div");
behavior({}, { init }).on(el);
assert(init.calledWithExactly(el));
});
});
describe("behavior.off()", () => {
it("calls teardown()", () => {
const teardown = sinon.spy();
behavior({}, { teardown }).off();
assert(teardown.calledOnce);
});
it("passes document.body if no target is provided", () => {
const teardown = sinon.spy();
behavior({}, { teardown }).off();
assert(teardown.calledWithExactly(document.body));
});
it("passes the right element if a target is provided", () => {
const teardown = sinon.spy();
const el = document.createElement("div");
behavior({}, { teardown }).off(el);
assert(teardown.calledWithExactly(el));
});
});
});