Our environment setup is done. The following example will show you how we can create a different suite block inside another suite block. This piece of code will yield the following output. Matcher works similarly in Jasmine framework. Jasmine does not depend on any other JavaScript framework. Following is an example of a complete describe block. It is recommended to use the jasmine or jasmine-npm package whenever possible. Jasmine is a testing framework for JavaScript. All the syntax used in Jasmine framework is clean and obvious. /** * ## Require & Instantiate * * Require Jasmine's core files. Jasmine comes with a clean syntax that is very close to a natural language. As this satisfies our requirement, we will have the following green screenshot as our output. Jasmine is an open-source JavaScript framework, capable of testing any kind of JavaScript application. In the above piece of code, we want person object to say “Hello world” but we also want that person object should consult with dictionary object to give us the output literal “Hello world”. The above piece of code will throw an error and generate a red color screenshot because we have already defined the “undefineValue” value to “0” and expecting it to be not defined. We named our project as Jasmine_Demo. Another notable feature of Jasmine is before and after each function. Consider a JavaScript file test.js, containing two functions, pi() and sin(). We will create two JavaScript files, one named as “NestedSpec.js” and another named as “nested.js”. Unit Testing JavaScript Using Jasmine What we'll cover. In this piece of code, we are checking whether the value of this variable is less than 5 or not. In the above example, while running the first spec block the value of the currentVal is 0. Step 6 − Now Create a web application project in your favorite IDE and add this downloaded library files into the application. Apart from equality check, Jasmine provides some methods to check Boolean conditions too. As we are passing number 5, which is smaller than 10, this test case will pass and give us the following output. In this step, we will create a JavaScript file named helloworld.js under src folder. Step 5 − Unzip the downloaded jasmine-standalone-2.4.1 folder. Jasmine provides a special matcher to check this special type of testing scenario that is toBeNaN(). Then we will get a red screen, which means the test actually fails because we are expecting an undefined value to be defined. Jasmine Expect allows you to write your expectation from the required function or JavaScript file. ToMatch() matcher works on String type variable. As true cannot be same as false, this test case will be valid and pass through. Jasmine is heavily influenced by Rspec, JS Spec, and Jspec. Let us again modify our customerMatcherSpec.js file with the following piece of code. Let us create a new spec file “spyJasmineSpec.js” and another js file named as “spyJasmine.js”. Depending on the level of application, this block can be called as a Skipping Spec and Skipping Suite respectively. On successful execution, these pieces of code will yield the following output. It will generate the following output. This is the block which actually contains each unit test case. Here we are using NetBeans 8.1 to develop our hello world app in Jasmine. Now let us see what if something goes wrong and the test fails. In the second expect block, we are checking whether the value of the currentVal is equal to 5 as the value of currentVal is zero hence our test passes and provides us with a green output.

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