is-eq-nine/test.js

Returns true if the given number is 9, false otherwise.

"use strict";

require("mocha");
const assert = require("assert");
const is9 = require("./");

describe("is9", function() {
    it("should return true if the number is 9", function() {
        assert(is9(9));
    });
  
    it("should return false if the number is not 9", function() {
        assert(!is9(9 + 1));
    });
    
    it("should return false if the number is not a number at all", function() {
        assert(!is9(null));
        assert(!is9(undefined));
        assert(!is9("9"));
        assert(!is9({prop: "9"}));
    });
});