OneStopTesting - Quality Testing Jobs, eBooks, Articles, FAQs, Training Institutes, Testing Software, Testing downloads, testing news, testing tools, learn testing, manual testing, automated testing, load runner, winrunner, test director, silk test, STLC

Forum| Contact Us| Testimonials| Sitemap| Employee Referrals| News| Articles| Feedback| Enquiry
 
Testing Resources
 
  • Testing Articles
  • Testing Books
  • Testing Certification
  • Testing FAQs
  • Testing Downloads
  • Testing Interview Questions
  • Career In Software Testing
  • Testing Jobs
  • Testing Job Consultants
  • Testing News
  • Testing Training Institutes
  •  
    Fundamentals
     
  • Introduction
  • Designing Test Cases
  • Developing Test Cases
  • Writing Test Cases
  • Test Case Templates
  • Purpose
  • What Is a Good Test Case?
  • Test Specifications
  • UML
  • Scenario Testing
  • Test Script
  • Test Summary Report
  • Test Data
  • Defect Tracking
  •  
    Software testing
     
  • Testing Forum
  • Introduction
  • Testing Start Process
  • Testing Stop Process
  • Testing Strategy
  • Risk Analysis
  • Software Listings
  • Test Metrics
  • Release Life Cycle
  • Interoperability Testing
  • Extreme Programming
  • Cyclomatic Complexity
  • Equivalence Partitioning
  • Error Guessing
  • Boundary Value Analysis
  • Traceability Matrix
  •  
    SDLC Models
     
  • Introduction
  • Waterfall Model
  • Iterative Model
  • V-Model
  • Spiral Model
  • Big Bang Model
  • RAD Model
  • Prototyping Model
  •  
    Software Testing Types
     
  • Static Testing
  • Dynamic Testing
  • Blackbox Testing
  • Whitebox Testing
  • Unit Testing
  • Requirements Testing
  • Regression Testing
  • Error Handling Testing
  • Manual support Testing
  • Intersystem Testing
  • Control Testing
  • Parallel Testing
  • Volume Testing
  • Stress Testing
  • Performance Testing
  • Agile Testing
  • Localization Testing
  • Globalization Testing
  • Internationalization Testing
  •  
    Test Plan
     
  • Introduction
  • Test Plan Development
  • Test Plan Template
  • Regional Differences
  • Criticism
  • Hardware Development
  • IEEE 829-1998
  • Testing Without a TestPlan
  •  
    Code Coverage
     
  • Introduction
  • Measures
  • Working
  • Statement Coverage
  • Branch Coverage
  • Path Coverage
  • Coverage criteria
  • Code coverage in practice
  • Tools
  • Features
  •  
    Quality Management
     
  • Introduction
  • Components
  • Capability Maturity Model
  • CMMI
  • Six Sigma
  •  
    Project Management
     
  • Introduction
  • PM Activities
  • Project Control Variables
  • PM Methodology
  • PM Phases
  • PM Templates
  • Agile PM
  •  
    Automated Testing Tools
     
  • Quick Test Professional
  • WinRunner
  • LoadRunner
  • Test Director
  • Silk Test
  • Test Partner
  • Rational Robot
  •  
    Performance Testing Tools
     
  • Apache JMeter
  • Rational Performance Tester
  • LoadRunner
  • NeoLoad
  • WAPT
  • WebLOAD
  • Loadster
  • OpenSTA
  • LoadUI
  • Appvance
  • Loadstorm
  • LoadImpact
  • QEngine
  • Httperf
  • CloudTest
  •  
    Languages
     
  • Perl Testing
  • Python Testing
  • JUnit Testing
  • Unix Shell Scripting
  •  
    Automation Framework
     
  • Introduction
  • Keyword-driven Testing
  • Data-driven Testing
  •  
    Configuration Management
     
  • History
  • What is CM?
  • Meaning of CM
  • Graphically Representation
  • Traditional CM
  • CM Activities
  • Tools
  •  
    Articles
     
  • What Is Software Testing?
  • Effective Defect Reports
  • Software Security
  • Tracking Defects
  • Bug Report
  • Web Testing
  • Exploratory Testing
  • Good Test Case
  • Write a Test
  • Code Coverage
  • WinRunner vs. QuickTest
  • Web Testing Tools
  • Automated Testing
  • Testing Estimation Process
  • Quality Assurance
  • The Interview Guide
  • Upgrade Path Testing
  • Priority and Severity of Bug
  • Three Questions About Bug
  •    
     
    Home » Testing Articles » Manual Testing Articles » Unit Testing

    Unit Testing

    A D V E R T I S E M E N T




    In this tutorial you will learn about unit testing, various levels of testing, various types of testing based upon the intent of testing, How does Unit Testing fit into the Software Development Life Cycle? Unit Testing Tasks and Steps, What is a Unit Test Plan? What is a Test Case? and Test Case Sample, Steps to Effective Unit Testing.

    There are various levels of testing:

    • Unit Testing
    • Integration Testing
    • System Testing

    There are various types of testing based upon the intent of testing such as:

    • Acceptance Testing
    • Performance Testing
    • Load Testing
    • Regression Testing

    Based on the testing Techniques testing can be classified as:

    • Black box Testing
    • White box Testing

    How does Unit Testing fit into the Software Development Life Cycle?

    This is the first and the most important level of testing. As soon as the programmer develops a unit of code the unit is tested for various scenarios. As the application is built it is much more economical to find and eliminate the bugs early on. Hence Unit Testing is the most important of all the testing levels. As the software project progresses ahead it becomes more and more costly to find and fix the bugs.

    In most cases it is the developer's responsibility to deliver Unit Tested Code.

    Unit Testing Tasks and Steps:
    Step 1: Create a Test Plan
    Step 2: Create Test Cases and Test Data
    Step 3: If applicable create scripts to run test cases
    Step 4: Once the code is ready execute the test cases
    Step 5: Fix the bugs if any and re test the code
    Step 6: Repeat the test cycle until the "unit" is free of all bugs

    What is a Unit Test Plan?

    This document describes the Test Plan in other words how the tests will be carried out.
    This will typically include the list of things to be Tested, Roles and Responsibilities, prerequisites to begin Testing, Test Environment, Assumptions, what to do after a test is successfully carried out, what to do if test fails, Glossary and so on

    What is a Test Case?

    Simply put, a Test Case describes exactly how the test should be carried out.
    For example the test case may describe a test as follows:
    Step 1: Type 10 characters in the Name Field
    Step 2: Click on Submit

    Test Cases clubbed together form a Test Suite

    Test Case Sample

    Test Case ID

    Test Case Description

    Input Data

    Expected Result

    Actual Result

    Pass/Fail

    Remarks






















    Additionally the following information may also be captured:
    a) Unit Name and Version Being tested
    b) Tested By
    c) Date
    d) Test Iteration (One or more iterations of unit testing may be performed)

    Steps to Effective Unit Testing:

    1) Documentation: Early on document all the Test Cases needed to test your code. A lot of times this task is not given due importance. Document the Test Cases, actual Results when executing the Test Cases, Response Time of the code for each test case. There are several important advantages if the test cases and the actual execution of test cases are well documented.

    a. Documenting Test Cases prevents oversight.
    b. Documentation clearly indicates the quality of test cases
    c. If the code needs to be retested we can be sure that we did not miss anything
    d. It provides a level of transparency of what was really tested during unit testing. This is one of the most important aspects.
    e. It helps in knowledge transfer in case of employee attrition
    f. Sometimes Unit Test Cases can be used to develop test cases for other levels of testing

    2) What should be tested when Unit Testing: A lot depends on the type of program or unit that is being created. It could be a screen or a component or a web service. Broadly the following aspects should be considered:

    a. For a UI screen include test cases to verify all the screen elements that need to appear on the screens
    b. For a UI screen include Test cases to verify the spelling/font/size of all the "labels" or text that appears on the screen
    c. Create Test Cases such that every line of code in the unit is tested at least once in a test cycle
    d. Create Test Cases such that every condition in case of "conditional statements" is tested once
    e. Create Test Cases to test the minimum/maximum range of data that can be entered. For example what is the maximum "amount" that can be entered or the max length of string that can be entered or passed in as a parameter
    f. Create Test Cases to verify how various errors are handled
    g. Create Test Cases to verify if all the validations are being performed

    3) Automate where Necessary: Time pressures/Pressure to get the job done may result in developers cutting corners in unit testing. Sometimes it helps to write scripts, which automate a part of unit testing. This may help ensure that the necessary tests were done and may result in saving time required to perform the tests.

    Summary:

    "Unit Testing" is the first level of testing and the most important one. Detecting and fixing bugs early on in the Software Lifecycle helps reduce costly fixes later on. An Effective Unit Testing Process can and should be developed to increase the Software Reliability and credibility of the developer. The Above article explains how Unit Testing should be done and the important points that should be considered when doing Unit Testing.

    Many new developers take the unit testing tasks lightly and realize the importance of Unit Testing further down the road if they are still part of the project. This article serves as a starting point for laying out an effective (Unit) Testing Strategy.



    More Manual Testing Articles
    Previous 1 2 3 4 5 6 7 8 9 10 11 Next



    discussionDiscussion Center
    Discuss
    Discuss

    Query

    Feedback
    Yahoo Groups
    Y! Group
    Sirfdosti Groups
    Sirfdosti
    Contact Us
    Contact

    Looking for Software Testing eBooks and Interview Questions? Join now and get it FREE!
     
    A D V E R T I S E M E N T
       
       

    Members Login


    Email ID:
    Password:


    Forgot Password
    New User
       
       
    Testing Interview Questions
  • General Testing
  • Automation Testing
  • Manual Testing
  • Software Development Life Cycle
  • Software Testing Life Cycle
  • Testing Models
  • Automated Testing Tools
  • Silk Test
  • Win Runner
  •    
       
    Testing Highlights

  • Software Testing Ebooks
  • Testing Jobs
  • Testing Frequently Asked Questions
  • Testing News
  • Testing Interview Questions
  • Testing Jobs
  • Testing Companies
  • Testing Job Consultants
  • ISTQB Certification Questions
  •    
       
    Interview Questions

  • WinRunner
  • LoadRunner
  • SilkTest
  • TestDirector
  • General Testing Questions
  •    
       
    Resources

  • Testing Forum
  • Downloads
  • E-Books
  • Testing Jobs
  • Testing Interview Questions
  • Testing Tools Questions
  • Testing Jobs
  • A-Z Knowledge
  •    
    Planning
    for
    Study ABROAD ?


    Study Abroad


    Vyom Network : Free SMS, GRE, GMAT, MBA | Online Exams | Freshers Jobs | Software Downloads | Programming & Source Codes | Free eBooks | Job Interview Questions | Free Tutorials | Jokes, Songs, Fun | Free Classifieds | Free Recipes | Bangalore Info | GATE Preparation | MBA Preparation | Free SAP Training
    Privacy Policy | Terms and Conditions
    Sitemap | Sitemap (XML)
    Job Interview Questions | Placement Papers | SMS Jokes | C++ Interview Questions | C Interview Questions | Web Hosting
    German | French | Portugese | Italian