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TERRIBLE TESTING case studies in

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are you testing the right things?

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I have no idea

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PROJECTS SOFTWARE TESTING and what they taught me about 5

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toddhgardner Todd H Gardner !

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1 Big Todd’s Awesome CRM

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1 Deliver a Customer Relationship Management system to replace ad-hoc processes for internal sales teams

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I have no idea what I’m doing

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Consulting!

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They have no idea what they’re doing

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70% Code Coverage REQUIRED

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Assertion-Free Testing public void Test_MyObj_For_Coverage() { MyObj obj = new MyObj(); try { obj.method1(); } catch (Exception e) {} try { obj.method2(); } catch (Exception e) {} try { obj.method3(); } catch (Exception e) {} // 100% Coverage, W00t! }

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Cool Tests Bro

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1 Big Todd’s Awesome CRM The Aftermath

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They all had their rules… 1. Thou shall test everything 2. Thou shalt not ship code 3. Thou shall have more sys 4. Thou shall abstract test f 5. Thou shalt not duplicate

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goodness testiness coverage test code ratio

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It’s unprofessional to ship untested code “

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2 Big Corp’s Video Academy

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2 Create a online Video Training Platform for crypto-zoologists

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unit code coverage 100% 100 0

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MOCKS

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code analysis metrics

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BUGS!

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2 Big Corp’s Video Academy The Aftermath

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code coverage % 100 0 what do we learn?

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code coverage % 100 0 what do we learn? not testing

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code coverage % 100 0 what do we learn? metrics-driven incentives

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code coverage % 100 0 what do we learn? nothing at all

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Testing the Mocks public void Test_MyObj_With_Mocks() { Mock mockObj1 = new Mock(); Mock mockObj2 = new Mock(); MyObj obj = new MyObj(mockObj1, mockObj2); mockObj2.expect().toBeCalledWith(mockObj1).andReturn(mockObj1); obj.method(); mockObj1.assertExpectations(); mockObj2.assertExpectations(); // What are we testing again? }

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Unit Tests

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Test-Induced http://david.heinemeierhansson.com/2014/test-induced-design-damage.html Design Damage

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3 Acme’s Collaboration Computing Platform

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3 Develop a platform for Spies to Upload Confidential Data and Collaborate on missions.

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Market and Technology FRONTIERS

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$2M / Mo Over 200 of the Cleverest Designers, Developers, and Testers Burning

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Advanced TECHNOLOGY

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System Tests Integration Tests Unit Tests Selenium UI and Services Inter-Module Contract Tests TDD, Conversation-based tests Testing Pyramid

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WE BUILT IT

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NO ONE CAME

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3 Acme’s Collaboration Computing Platform The Aftermath

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System Tests Integration Tests Unit Tests Testing Pyramid

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System Tests Integration Tests Unit Tests Testing Pyramid Interface Risk Orchestration Risk Functional Risk

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System Tests Integration Tests Unit Tests Testing Pyramid Interface Risk Orchestration Risk Functional Risk User Tests Market Risk

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Interface Risk Orchestration Risk Functional Risk Market Risk Testing Scales

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Interface Risk Orchestration Risk Functional Risk Market Risk Testing Scales System Tests Integration Tests User Tests Unit Tests

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4 Widget eCommerce Monolith’s Sell-a-majig

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4 Expand the Widget Ecommerce platform with more products

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yet another ECOMMERCE project

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lots of captive USERS

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Interface Risk Orchestration Risk Functional Risk Market Risk Testing Scales

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Interface Orchestration Functional Market Testing Scales System Tests Integration Tests User Tests Unit Tests

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it shipped UGLY

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customers kept BUYING

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Prints Money the dirty old duct-taped machine that tm

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4 Widget eCommerce Monolith’s Sell-a-majig The Aftermath

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Monolith ECommerce Acme Collaboration Information Technology Uninteresting Fragile Technology Poorly Tested Success! Engineering Advancing Latest Technology Well Tested Failure!

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Monolith ECommerce Acme Collaboration Success! Failure! High Risk Low Risk

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SYSTEM Purpose Criticality Lifespan Frequency CONFIDENCE

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5 My Startup

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5 find and fix JavaScript bugs in modern web applications …and build a better web

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{Track:js} http://trackjs.com JavaScript Error Monitoring

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User Activity AJAX Requests Console Logging Browser Context Inline Source

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Interface Risk Orchestration Risk Functional Risk Market Risk Testing Scales

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My Money! This time it’s

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Launch Fast and measure

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Simple Decoupled Obvious Abstract & &

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Plumbing Services

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Interface Risk Orchestration Risk Functional Risk Market Risk Testing Scales System Tests Integration Tests User Tests Unit Tests

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Service Model Test Fixture Other Services Wrapper Data Unit Test Integration Test Testing Structure

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“beta” Service Dragons be here! Testing Structure Canary Users Analytics Monitoring

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FAST TO FIX is almost as good as NEVER BROKEN (and sometimes better)

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PROJECTS SOFTWARE TESTING and what they taught me about 5

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1 Big Todd’s Awesome CRM METRICS don’t test to hit

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2 Big Corp’s Video Academy BREAKING test what is

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3 Acme’s Collaboration Computing Platform SCARIEST test the thing first

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4 Widget eCommerce Monolith’s Sell-a-majig CUSTOMER USE tests can’t substitute for

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5 JavaScript Error Tracking TrackJS’s MONITORING can substitute for tests

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{Track:js} http://trackjs.com JavaScript Error Monitoring

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TERRIBLE TESTING case studies in toddhgardner ! " [email protected]