Setting Up and Tearing Down Jasmine Tests

The beforeEach and afterEach functions

In the example below, we have two tests. In each case, we create a book object and then call a function on it. On line 1, the getShortSummary function uses string interpolation to combine the title and year values. On line 6, the getLongSummary function uses string interpolation to combine the title, author, and year values.

We use the beforeEach function on line 14. The beforeEach function takes an anonymous function as its argument and runs it before each test. In the example, we use the beforeEach function to reset the value of the book object. This makes our test code cleaner and also protects us from accidentally changing the value of the book object in one of the tests.

Jasmine also gives us an afterEach method, which lets us run a function after each test finishes. We can use this afterEach method to clean up our variables after the tests run. We call the afterEach function on line 32.