49 lines
1.6 KiB
TypeScript
49 lines
1.6 KiB
TypeScript
import { computeBestTime, getStatus, maxDate } from "../reducer_support";
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import moment from "moment";
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import { ConnectionStatus } from "../interfaces";
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// RELEVANT:
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// https://en.wikipedia.org/wiki/Now_and_Later
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const NOW = "Tue, 03 Oct 2017 09:00:00 -0500";
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const LATER = "Wed, 04 Oct 2017 09:00:00 -0500";
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const LATER_JSON = moment(LATER).toJSON();
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const NOW_JSON = moment(NOW).toJSON();
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describe("computeBestTime()", () => {
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const STUB: ConnectionStatus = { state: "down", at: NOW_JSON };
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it("returns same input when `last_saw_mq` is unavailable", () => {
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expect(computeBestTime(undefined, undefined)).toBe(undefined);
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expect(computeBestTime(STUB, undefined)).toBe(STUB);
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const hmm = computeBestTime(undefined, LATER);
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expect(hmm && hmm.at).toEqual(LATER_JSON);
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});
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it("computes best time when enough information is present", () => {
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const expected: ConnectionStatus = { state: "down", at: LATER_JSON };
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expect(computeBestTime(STUB, LATER)).toEqual(expected);
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});
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});
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describe("maxDate()", () => {
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it("picks the max time, regardless of position", () => {
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expect(maxDate(moment(NOW), moment(LATER))).toBe(LATER_JSON);
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expect(maxDate(moment(LATER), moment(NOW))).toBe(LATER_JSON);
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});
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it("picks dates[0] when there is a tie", () => {
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expect(maxDate(moment(LATER), moment(LATER))).toBe(LATER_JSON);
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});
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});
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describe("getStatus()", () => {
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it("returns 'down' when not given enough data", () => {
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expect(getStatus(undefined)).toBe("down");
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});
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it("returns status.state when given a ConnectionStatus object", () => {
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expect(getStatus({ at: NOW, state: "up" })).toBe("up");
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});
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});
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