testing_exercise

JavaScript Testing Exercise

For this exercise you will be writing tests to make functions pass. Start by writing the tests - seeing them fail and then writing the code necessary to make the tests pass. Follow this process:

• Red -> write test code that fails
• Green -> make the tests pass
• Refactor -> refactor when/if necessary

Getting started

You should not need to modify anything in the index.html file - we have already included mocha and chai for you. Write tests first for the following functions, and then write the code to make them pass

• Write a function called replaceWith that takes in a string, a character to replace and a character to replace it with and returns the string with the replacements. Write tests to make sure this is case sensitive

replaceWith("awesome", "e", "z") // "awzsomz"
replaceWith("Foo", "F", "B") // "Boo"

• Write a function called expand which takes an array and a number and returns a copy of the array with as many numbers as specified

expand([1,2,3],3) //[1,2,3,1,2,3,1,2,3]
expand(["foo", "test"],1) //["foo","test"]

• Write a function called acceptNumbersOnly which takes in any number of arguments and returns true if all of them are numbers. Watch out for NaN - it is a typeof "number"!

acceptNumbersOnly(1,"foo") // false
acceptNumbersOnly(1,2,3,4,5,6,7) // true
acceptNumbersOnly(1,2,3,4,5,6,NaN) // false

• Write a function called mergeArrays which takes in two arrays and returns one array with the values sorted

mergeArrays([2,1],[3,4]) // [1,2,3,4]

• Write a function called mergeObjects which takes in two objects and return an object with the keys and values combined. If the second parameter has the same key - it should override first one. There is a built in function called Object.assign - research it, but do not use it, try to do this on your own!

var obj1= {
    name: "Foo",
    num: 33
}
var obj2 = {
    test: "thing",
    num: 55
}
mergeObjects(obj1, obj2) 
/*/
{
    name: "Foo",
    test: "thing",
    num: 55
}
/*/