Gartner Research

Produce Better Software by Using a Layered Testing Strategy

Published: 07 January 2014

ID: G00255138

Analyst(s): Sean Kenefick


Development teams aiming to get better-quality products to market faster must shift testing to earlier in the development process by maximizing and reusing isolation tests, minimizing the use of hard-to-maintain GUI tests, and exploiting mock and service virtualization technologies.

Table Of Contents

Summary of Findings


  • A Layered Approach to Testing
  • Individually Testing Application Layers
    • Much Ado About Nothing — The Benefits of Isolation Testing
    • Class Object Layer Testing
    • Subsystem Groupings Layer Testing
    • System Layer Testing
    • To Mock or Not to Mock
  • Strengths
  • Weaknesses
  • Use a Layered Reuse Approach to Automated Testing and Execute Tests Continuously
  • Less Automated GUI Testing, More Automated Business Logic Testing
  • Define and Honor Unit Test Coverage Criteria
  • Educate Developers on Unit Test and Dependency Injection Coding Patterns
  • Use Mocking for Isolation Testing and Hard-to-Access Objects
  • Use Virtualized Data Solutions to Simulate Real-Life Data

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