describe("#reverse", function () {

it ("should return a new array that is the reverse of the input array", function () {

expect(reverse([ 1, 2, 3, 4, 5 ])).toEqual([ 5, 4, 3, 2, 1]);

expect(reverse([ "hello", "world" ])).toEqual([ "world", "hello" ]);

expect(reverse([])).toEqual([]);

});

});

describe("#flatten", function () {

it ("should flatten a potentially two-dimensional array", function () {

expect(flatten([ 1, 2, [ 10, 20 ], 3, 4, 5 ])).toEqual([ 1, 2, 10, 20, 3, 4, 5 ]);

expect(flatten([ "this", "is", "already", "flat" ])).toEqual([ "this", "is", "already", "flat" ]);

expect(flatten([])).toEqual([]);

expect(flatten([ 1, [2, 3], 4, [5, 6, 7], 8 ])).toEqual([ 1, 2, 3, 4, 5, 6, 7, 8 ]);

});

});

describe("#sumOfMultiplesOf3And5", function () {

it ("should sum the multiples of 3 and 5 less than or equal to n", function () {

expect(sumOfMultiplesOf3And5(100)).toBe(2418);

expect(sumOfMultiplesOf3And5(50)).toBe(593);

expect(sumOfMultiplesOf3And5(0)).toBe(0);

});

});

describe("#atLeastOneVowel", function () {

it ("should return true if the word contains at least one vowel", function () {

expect(atLeastOneVowel("hello")).toBe(true);

expect(atLeastOneVowel("dry")).toBe(false);

expect(atLeastOneVowel("sdfjkl")).toBe(false);

});

});

describe("#longestAwesomeTweet", function () {

it ("should return the longest tweet containing 'awesome' or the empty string if no tweets contain 'awesome'", function () {

expect(longestAwesomeTweet([ "awesome", "longer tweet with awesome", "not awesome", "empty" ])).toEqual("longer tweet with awesome");

expect(longestAwesomeTweet([ "hello", "world" ])).toEqual("");

});

});

describe("#elementsToContent", function () {

it ("should return the text content inside an html tag", function () {

expect(elementsToContent(["<p>this is a paragraph</p>", "<li>list item</li>", "<a>link!</a>" ]))

.toEqual([ "this is a paragraph", "list item", "link!" ]);

expect(elementsToContent([ "<h1>This is an important heading!</h1>", "<h5>this is not as important</h5>" ]))

.toEqual([ "This is an important heading!", "this is not as important" ]);

});

});

describe("#randomArray", function () {

it ("should return an array of random nums with length `length` with rand nums up to `max`", function () {

var listA = randomArray(10, 100);

expect(listA.length).toBe(10);

expect(listA.every(function (number) {

return number < 100;

})).toBe(true);

var listB = randomArray(5, 10);

expect(listB.length).toBe(5);

expect(listB.every(function (number) {

return number < 10;

})).toBe(true);

});

});

describe("#randomElements", function () {

it ("should return n random elements from the given array", function () {

var colors = [ "red", "orange", "yellow", "green", "blue", "purple", "gray", "black", "white" ];

var listA = randomElements(colors, 5);

expect(listA.length).toBe(5);

expect(listA.every(function (element) {

return colors.indexOf(element) > -1;

})).toBe(true);

var suits = [ "clubs", "diamonds", "hearts", "spades" ];

var listB = randomElements(suits, 3);

expect(listB.length).toBe(3);

expect(listB.every(function (element) {

return suits.indexOf(element) > -1;

})).toBe(true);

});

});