roguri-palindrome/test/test.js

Palindrome detector

// 2つのnpmモジュールをインポート
let assert = require("assert"); // Node.jsの組み込みアサーションモジュール
let Phrase = require("../index.js"); // テストしたいPhraseオブジェクトをインポート

describe("Phrase", function () {
    describe("#palindrome", function () {
        it("should return true for a palindrome", function () {
            let plainPalindrome = new Phrase("racecar");
            assert(plainPalindrome.palindrome());
        });
        it("should return false for a non-palindrome", function () {
            let nonPalindrome = new Phrase("apple");
            assert(!nonPalindrome.palindrome());
        });
        it("should return true for a mixed-case palindrome", function () {
            let mixedCase = new Phrase("RaceCar");
            assert(mixedCase.palindrome());
        });
        it("should return true for a palindrome with punctuation", function () {
            let punctuatedPalindrome = new Phrase("Madam, I'm Adam.");
            assert(punctuatedPalindrome.palindrome());
        });
        it("should return false for an empty string", function () {
            let emptyPhrase = new Phrase("");
            assert(!emptyPhrase.palindrome());
        });
        describe("#letters", function () {
            it("should return only letters", function () {
                let punctuatedPalindrome = new Phrase("Madam, I'm Adam.");
                assert.strictEqual(punctuatedPalindrome.letters(), "MadamImAdam");
            });
            it("should return nothing for a null", function () {
                let noLetters = new Phrase("1234.56")
                assert.strictEqual(noLetters.letters(), "")
            })
        });
    });
});