Pet Constructor - ;TLDR

In JavaScript, we can use constructor functions to create objects of the same type. These objects can be used to model things in the real world.

To create a new instance of an object, we use the new keyword.

The first feature of our virtual pet is that it should have a name.

In this challenge, we are going to create a Pet constructor function that will allow us to create our new pet.

Learning objectives

• feature testing in the Node REPL

• writing unit tests to describe expected behaviour of a function

• debugging using a stack trace

• exporting things from files using module.exports

• requiring exported values using require

• writing a constructor function

To complete this challenge, you will need to:

• open the Node REPL

• create a new variable pet equal to new Pet('Fido');

• discuss the resulting error with your cohort mates

  • what is the type of error?

  • research what this error type means.

  • can you suggest a way of solving the problem?

• translate this error into a unit test - what do you expect to happen when you call new Pet('Fido')?

• create a Pet constructor function and export it from the file

• require the Pet function into your unit test and make the test pass

Once you are done, commit your work, and push to GitHub:

Recommended Reading

• Node REPL

• Jest matchers

• module.exports and require on FreeCodeCamp