TypeScript 2.x By Example

Jasmine

Jasmine is a testing framework that is widely used with Angular. Jasmine provides functions for us to write and manage our test cases. These functions are described as follows:

• describe(): This function acts as a container for our suite of tests. Jasmine identifies the describe function as the root of the test case, and uses that as the start of running the test case.
• beforeEach(): The beforeEach function acts as an arrange in our test case. This is where we write our common code, which is required to set up our test case. 
• it(): This is a function where we act on our code. We will normally have multiple it() functions inside our describe() function. Each it() function acts as a separate unit test.
• expect(): The expect() function ...