Golang Unit Testing and Testing Best Practices | Ultimate Guide

Overview of Golang Unit Testing

With the evolutionary growth of the software development process, Test-Driven Development is an approach which consolidates test first driven methodology and refactoring. This approach is based on the principle that we should write small codes rather than writing long codes. In TDD, whenever we want to add more functionality in our codes, we first have to write a test for that. After that, we add new functionality with small code lines combined and then test it with our test. This approach helps us to reduce the risk of encountering significant problems at the production level.

Golang Unit Testing Approach

Unit testing operates on a low level and is tightly coupled with source code. In the best of worlds, one unit test always correlates to one minimal piece of functionality. These functionalities are independent of the other components of the code.

A key practice for extreme programming, it suggests that the code is developed or changed exclusively on the basis of the Unit Testing. Click to explore about, Test-Driven Development for Java

Integration Testing in Software Testing

It validates that software components work correctly when combined with each other. Only the interfaces between components are tested and it is assumed that each component has been individually unit tested.

What is Test-Driven Development (TDD)?

TDD = Refactoring + TFD

Test-Driven Development Workflow

• Write a concise, minimal test for a new piece of functionality. This test will fail since the functionality isn’t implemented yet (if it passes one knows that the functionality either already exists or that the test isn’t designed correctly).
• Implement the new functionality and run all tests, both the new and pre-existing ones. Repeat until all tests pass.
• Clean up the code and ensure that all the tests still pass, then return to step 1.

Test First Programming Concept

• For this programming approach we write the tests before programming and during it for functionality, all these test cases are run whenever we test the functionality.
• For test first programming we can also say that we are going to write the automated test cases before the functionality and the developer has to write the test case to satisfy these tests cases.

Features Code in Test-Driven Development (TDD)

• Firstly when we go to design or implement a new feature we check whether an existing design is the best design which will help us to implement a new functionality.
• If the above condition satisfies then we follow the TFD approach for the implementation of new functionality.

A great approach for software development. TDD is nothing but the development of tests before adding a feature in code. Click to explore about, Test-Driven Development in Python

What are the advantages of Test-Driven Development (TDD)?

Below mentioned are its advantages:

• Ensures quality - It helps in ensuring the quality by focusing on requirements before writing the code.
• Keeps code neat and tidy - It assists in keeping the code clear, simple and testable by bringing it down into small achievable steps.
• Maintains Documentation - It provides documentation about how the system works for anyone coming onto the team later.
• Repeatable Test and rapid change - It builds a suite of repeatable regression test and it acts as an enabler for rapid change.

What is the process cycle of Test-Driven Development (TDD)?

• For Behavior Driven Development to be successful, it becomes crucial to classify and verify only those behaviors that give directly to business outcomes. Developer in the BDD environment has to identify what program to test and what not to test and to understand why the test failed. Much like Test-Driven Development, BDD also recommends that tests should be written first and should describe the functionalities of the product that can be suited to the requirements.
• Behavior Driven Development helps greatly when building detailed automated unit tests because it focuses on testing behavior instead of its implementation. The developer thus has to focus on writing test cases keeping the synopsis rather than code implementation in mind. By doing this, even when the requirements change, the developer does not have to change the test, input, and output to support it. That makes unit testing automation much faster and more reliable. Though BDD has its own sets of advantages, it can sometimes fall prey to reductions.
• Development teams and Tester, therefore, need to accept that while failing a test is a guarantee that the product is not ready to be delivered to the client, passing a test also does not mean that the product is ready for launch.
• It will be closed when development, and business teams will give updates and progress report on time. Since the testing efforts are moved more towards automation and cover all business features and use cases, this framework ensures a high defect detection rate due to higher test coverage, faster changes, and timely releases.

A software development process which includes test-first development. Click to explore about, Test-Driven Database Development

	< GOPATH >
 | --src | -- < Project Name >
 | --main.go | --main_test.go | --src | -- < pkg 1 >
 | | --file1.go | | --file1_test.go | …
 | -- < pkg 2 >
	

package main
import "testing"

func TestSum(t * testing.T) {
 total: = Sum(5.5, 5)
 if total != 10.5 {
  t.Errorf("Sum was incorrect, got: %f, want: %f.", total, 10.5)
 }
}

package main
func Sum(x int, y int) int {
 return x + y
}
func main() {
 Sum(5.5, 5)
}

package main
func Sum(x float64, y float64) float64 {  
    return x + y
}
func main() {  
    Sum(5.5, 5)
}

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