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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
// @flow
import { handleError, promisify, endTruncateStr, waitForMs } from "../utils";
describe("handleError()", () => {
const testErrorText = "ERROR: ";
const testErrorObject = { oh: "noes" };
beforeEach(() => {
global.console = { log: jest.fn() };
});
it("logs error text with error value", () => {
handleError(testErrorObject);
expect(console.log).toHaveBeenCalledWith(testErrorText, testErrorObject);
});
});
describe("promisify()", () => {
let testPromise, testContext, testMethod, testArgs;
beforeEach(() => {
testContext = {};
testMethod = jest.fn();
testArgs = [];
});
it("returns a Promise", () => {
testPromise = promisify(testContext, testMethod, testArgs);
expect(testPromise instanceof Promise).toBe(true);
});
it("applies promisified method", () => {
testPromise = promisify(testContext, testMethod, testArgs);
expect(testMethod).toHaveBeenCalledWith(testArgs, expect.anything());
});
});
describe("endTruncateStr()", () => {
let testString;
const testSize = 11;
describe("when the string is larger than the specified size", () => {
it("returns an elipsis and characters at the end of the string", () => {
testString = "Mozilla Firefox is my favorite web browser";
expect(endTruncateStr(testString, testSize)).toBe("…web browser");
});
});
describe("when the string is not larger than the specified size", () => {
it("returns the string unchanged", () => {
testString = "Firefox";
expect(endTruncateStr(testString, testSize)).toBe(testString);
});
});
});
describe("waitForMs()", () => {
let testPromise;
const testMilliseconds = 10;
beforeEach(() => {
global.setTimeout = jest.fn();
});
it("returns a Promise", () => {
testPromise = waitForMs(testMilliseconds);
expect(testPromise instanceof Promise).toBe(true);
});
it("calls setTimeout() on the resolve of the Promise", () => {
testPromise = waitForMs(testMilliseconds);
expect(setTimeout).toHaveBeenCalledWith(
expect.anything(),
testMilliseconds
);
});
});
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