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Jasmine JavaScript Testing Update

Jasmine JavaScript Testing Update

By : Paulo Vitor Zacharias Ragonha
4.2 (14)
Buy this Book
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Jasmine JavaScript Testing Update

Jasmine JavaScript Testing Update

4.2 (14)
By: Paulo Vitor Zacharias Ragonha
Buy this Book

Overview of this book

This book is for web developers and designers who work with React.js and JavaScript and who are new to unit testing and automation. It's assumed that you have a basic knowledge of JavaScript and HTML.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Getting Started with Jasmine
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1. Getting Started with Jasmine
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JavaScript – the bad parts
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Jasmine and behavior-driven development
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Downloading Jasmine
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Summary
2
2. Your First Spec
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2. Your First Spec
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The Investment Tracker application
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Jasmine basics and thinking in BDD
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Setup and teardown
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Nested describes
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Summary
3
3. Testing Frontend Code
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3. Testing Frontend Code
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Thinking in terms of components (Views)
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The module pattern
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Using HTML fixtures
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Basic View coding rules
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Testing Views with jQuery matchers
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Summary
4
4. Asynchronous Testing – AJAX
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4. Asynchronous Testing – AJAX
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Acceptance criterion
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Setting up the scenario
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Writing the spec
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Summary
5
5. Jasmine Spies
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5. Jasmine Spies
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The "bare" spy
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Spying on an object's functions
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Testing DOM events
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Summary
6
6. Light Speed Unit Testing
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6. Light Speed Unit Testing
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Jasmine stubs
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Jasmine Ajax
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Summary
7
7. Testing React Applications
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7. Testing React Applications
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Project setup
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Our first React component
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The Virtual DOM
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JSX
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Component attributes (props)
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Component events
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Component state
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Component life cycle
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Composing components
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Summary
8
8. Build Automation
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8. Build Automation
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Module bundler – webpack
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Test runner: Karma
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Quick feedback loop
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Optimizing for production
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Static code analysis: JSHint
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Continuous integration – Travis-CI
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Summary
9
Index
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Index

Nested describes

Nested describes are useful when you want to describe similar behavior between specs. Suppose we want the following two new acceptance criteria:

  • Given an investment, when its stock share price valorizes, it should have a positive return on investment (ROI)
  • Given an investment, when its stock share price valorizes, it should be a good investment

Both these criteria share the same behavior when the investment's stock share price valorizes.

To translate this into Jasmine, you can nest a call to the describe function inside the existing one in the InvestmentSpec.js file (I removed the rest of the code for the purpose of demonstration; it is still there):

describe("Investment", function()
  describe("when its stock share price valorizes", function() {
   
  });
});

It should behave just like the outer one, so you can add specs (it) and use the setup and teardown functions (beforeEach, afterEach).

Setup and teardown

When using the setup and teardown functions...

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Jasmine JavaScript Testing Update
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