(c) 2007 Mauro Pezzegrave; amp; Michal Young课件.ppt

Sandwich .. 精品文档 Sandwich integration is flexible and adaptable, but complex to plan Thread ... 精品文档 A “thread” is a portion of several modules that together provide a user-visible program feature. Thread ... 精品文档 Integrating one thread, then another, etc., we maximize visibility for the user Thread ... 精品文档 As in sandwich integration testing, we can minimize stubs and drivers, but the integration plan may be complex 精品文档 精品文档 精品文档 精品文档 Integration and Component-based Software Testing 精品文档 Learning objectives Understand the purpose of integration testing Distinguish typical integration faults from faults that should be eliminated in unit testing Understand the nature of integration faults and how to prevent as well as detect them Understand strategies for ordering construction and testing Approaches to incremental assembly and testing to reduce effort and control risk Understand special challenges and approaches for testing component-based systems What is integration testing? Module test Integration test System test Specification: Module interface Interface specs, module breakdown Requirements specification Visible structure: Coding details Modular structure (software architecture) — none — Scaffolding required: Some Often extensive Some Looking for faults in: Modules Interactions, compatibility System functionality 精品文档 Integration versus Unit Testing Unit (module) testing is a necessary foundation Unit level has maximum controllability and visibility Integration testing can never compensate for inadequate unit testing Integration testing may serve as a process check If module faults are revealed in integration testing, they signal inadequate unit testing If integration faults occur in interfaces between correctly implemented modules, the errors can be traced to module breakdown and interface specifications 精品文档 精品文档 Integration Faults Inconsistent interpretation of parameters or values Example: Mixed units (meters/yards) in Martian Lander Violations of value