Testing Software Architecture

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vladikk doit-intl.com Join at slido.com with #testcon2019 TESTING SOFTWARE ARCHITECTURE

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vladikk doit-intl.com Join at slido.com with #testcon2019 @vladikk vladikk.com DoiT International

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019 Design Patterns Libraries / Frameworks Infrastructural components Programming languages

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vladikk doit-intl.com Join at slido.com with #testcon2019 Adapting to changes in business Adapting to changes in technology Testing out assumptions Evolutionary architecture

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019 So#ware Architecture Tes1ng So#ware Architecture Automa1on Architectural Tests

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vladikk doit-intl.com Join at slido.com with #testcon2019 SOFTWARE  ARCHITECTURE

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vladikk doit-intl.com Join at slido.com with #testcon2019 "Architecture is about the important stuﬀ, whatever that is”  - Ralph Johnson “Software architecture is those decisions which are  both important and hard to change”   - Martin Fowler

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vladikk doit-intl.com Join at slido.com with #testcon2019 …but it’s hard!!! SOFTWARE SOLVES PROBLEMS GOOD DESIGN SUPPORTS THE BUSINESS

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vladikk doit-intl.com Join at slido.com with #testcon2019 Infrastructure Databases Architectural styles Frameworks Languages Methodologies

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vladikk doit-intl.com Join at slido.com with #testcon2019 THE GOAL OF SOFTWARE ARCHITECTURE IS TO MANAGE COMPLEXITY!

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vladikk doit-intl.com Join at slido.com with #testcon2019 1. Component level 2. System level 3. Implementation level Complexity Management

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vladikk doit-intl.com Join at slido.com with #testcon2019 Local Complexity

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vladikk doit-intl.com Join at slido.com with #testcon2019 Global Complexity

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vladikk doit-intl.com Join at slido.com with #testcon2019 Global Complexity

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vladikk doit-intl.com Join at slido.com with #testcon2019 ARCHITECTURE = BOUNDARIES DESIGN

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vladikk doit-intl.com Join at slido.com with #testcon2019 "System design … is inherently about boundaries - what’s in, what's out, what spans, what moves between, and about tradeoﬀs. It reshapes what is outside, just as it shapes what is inside.” - Ruth Malan

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vladikk doit-intl.com Join at slido.com with #testcon2019 Big design upfront No design Architect Evolutionary architecture

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vladikk doit-intl.com Join at slido.com with #testcon2019 ENTROPY - GRADUAL DECLINE INTO DISORDER

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vladikk doit-intl.com Join at slido.com with #testcon2019 TESTING SOFTWARE  ARCHITECTURE

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vladikk doit-intl.com Join at slido.com with #testcon2019 FUNCTIONAL TESTING: UNIT, INTEGRATION, END-TO-END NON-FUNCTIONAL TESTING: PERFORMANCE, STRESS, SECURITY, USABILITY, ETC DESIGN TESTING: LOCAL AND GLOBAL COMPLEXITIES OF THE DESIGN

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vladikk doit-intl.com Join at slido.com with #testcon2019 Good Architecture Easy to navigate Easy to contribute Easy to change Delivers business goals

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vladikk doit-intl.com Join at slido.com with #testcon2019 Bad Architecture Hard to navigate Hard to contribute Hard to change Under/over engineered Big ball of mud

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vladikk doit-intl.com Join at slido.com with #testcon2019 "A Big Ball of Mud is a haphazardly structured, sprawling, sloppy, duct-tape-and-baling-wire, spaghetti-code jungle. These systems show unmistakable signs of unregulated growth, and repeated, expedient repair. Information is shared promiscuously among distant elements of the system, often to the point where nearly all the important information becomes global or duplicated.” - Joseph Yoder

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vladikk doit-intl.com Join at slido.com with #testcon2019 ARCHITECTURE = BOUNDARIES DESIGN GOOD ARCHITECTURE: GOOD BOUNDARIES BAD ARCHITECTURE: BAD BOUNDARIES

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vladikk doit-intl.com Join at slido.com with #testcon2019 BAD BOUNDARIES = EVERYBODY SUFFERS

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vladikk doit-intl.com Join at slido.com with #testcon2019 So9ware Engineers Hard to add new functionality Hard to change existing functionality Impossible to unit test

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vladikk doit-intl.com Join at slido.com with #testcon2019 Global Complexity

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019 QA Engineers Defects caused by logic duplication Regression testing in-proportionally long

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vladikk doit-intl.com Join at slido.com with #testcon2019 Database Administrators Multiple sources of truth Inconsistent data that has to be fixed manually Lack of transactions due to design constraints

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vladikk doit-intl.com Join at slido.com with #testcon2019 OperaAons No DevOps culture Big releases Rare deployments Complex configurations for components

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vladikk doit-intl.com Join at slido.com with #testcon2019 OperaAons No DevOps culture Big releases Rare deployments Complex configurations for components So9ware Engineers Hard to add new functionality Hard to change existing functionality Impossible to unit test QA Engineers Defects caused by logic duplication Regression testing in-proportionally long Database Administrators Multiple sources of truth Inconsistent data that has to be fixed manually Lack of transactions due to design constraints BAD BOUNDARIES = EVERYBODY SUFFERS

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vladikk doit-intl.com Join at slido.com with #testcon2019 GOOD ARCHITECTURE REQUIRES SHARED OWNERSHIP

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vladikk doit-intl.com Join at slido.com with #testcon2019 AUTOMATING ARCHITECTURAL TESTS

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vladikk doit-intl.com Join at slido.com with #testcon2019 StaAc Code Analysis Analyze the codebase Query the code’s health Flexible health rules definitions Build pipeline integrations

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019

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vladikk doit-intl.com Join at slido.com with #testcon2019 EVOLUTION DRIVERS

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vladikk doit-intl.com Join at slido.com with #testcon2019 ORGANIZATIONAL CHANGE DRIVERS SMALL: AD-HOC INTEGRATION LARGE: FORMAL INTEGRATION

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vladikk doit-intl.com Join at slido.com with #testcon2019 BUSINESS STRATEGY CHANGE DRIVERS SUPPORTING CORE BUSINESS

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vladikk doit-intl.com Join at slido.com with #testcon2019 WRAP UP

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vladikk doit-intl.com Join at slido.com with #testcon2019 Software architecture manages complexity Local and global complexities Everyone suffers if module boundaries are ineffective Look for symptoms of bad boundaries. And react! Use static code analysis tools to control codebase evolution Look for chages in the organization structure and business strategies that affect software design

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vladikk doit-intl.com Join at slido.com with #testcon2019

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https://bit.ly/2ptJ5fS THANK  YOU! @vladikk vladikk.com https://bit.ly/31nSD9c http://careers.doit-intl.com