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Testability

Testability. Software testability refers to the ease with which software can be made to demonstrate its faults through (typically execution-based) testing. Testability. Testability Tactics. Testability Tactics. Control and Observe System State

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Testability

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  1. Testability Software testability refers to the ease with which software can be made to demonstrate its faults through (typically execution-based) testing.

  2. Testability

  3. Testability Tactics

  4. Testability Tactics • Control and Observe System State • Specialized interfaces: specialized testing interfaces to control or capture variable values for a component either through a test harness or through normal execution. • Record/playback: capturing information crossing an interface and using it as input for further testing, by recreating the faulty state. • Localize state storage: store state in a single place for start a system in an arbitrary state for a test. • Abstract data sources: abstracting data access interfaces for easy substitution of test data for test purpose. • Sandbox: isolating an instance of the system from real world to enable experimentation that is unconstrained by the worry about having to undo the consequences of the experiments. • Executable assertions: assertions are hard-coded and placed at desired locations to indicate when and where a program is in a faulty state.

  5. Testability Tactics • Limit Complexity • Limit structural complexity: avoiding or resolving cyclic dependencies between components, isolating and encapsulating dependencies on the external environment, reducing dependencies between components in general. • Limit non-determinism/behavioral complexity: finding all sources of non-determinism (usually in parallel/concurrent computation) and weeding them out as much as possible.

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