SlideShare a Scribd company logo
TERRIBLE
TESTING
case studies in
are you
testing
the right things?
I have
no idea
PROJECTS
SOFTWARE TESTING
and what they taught me about
5
toddhgardner
Todd H Gardner
!
1Big Todd’s
Awesome CRM
1
Delivera
CustomerRelationshipManagement
systemto replacead-hoc
processesfor internalsalesteams
I have no idea
what I’m doing
Consulting!
They have no idea
what they’re doing
70% Code
Coverage
REQUIRED
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!
}
Cool Tests Bro
1Big Todd’s
Awesome CRM
The Aftermath
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
goodness
testiness
coverage
test code ratio
It’s unprofessional to
ship untested code
“
2Big Corp’s
Video Academy
2
Createa online
Video Training Platform
for crypto-zoologists
unit code coverage 100%
1000
MOCKS
code analysis
metrics
BUGS!
2Big Corp’s
Video Academy
The Aftermath
code coverage %
1000
what do we learn?
code coverage %
1000
what do we learn?
not testing
code coverage %
1000
what do we learn?
metrics-driven
incentives
code coverage %
1000
what do we learn?
nothing at all
Testing the Mocks
public void Test_MyObj_With_Mocks() {
Mock<MyObj> mockObj1 = new Mock<MyObj>();
Mock<OtherObj> mockObj2 = new Mock<OtherObj>();
MyObj obj = new MyObj(mockObj1, mockObj2);
mockObj2.expect().toBeCalledWith(mockObj1).andReturn(mockObj1);
obj.method();
mockObj1.assertExpectations();
mockObj2.assertExpectations();
// What are we testing again?
}
Unit Tests
Test-Induced
http://david.heinemeierhansson.com/2014/test-induced-design-damage.html
Design Damage
3Acme’s
Collaboration
ComputingPlatform
3
Developa platformforSpiesto
Upload ConfidentialData
andCollaborateon missions.
Market and Technology
FRONTIERS
$2M / Mo
Over 200 of the
Cleverest
Designers,
Developers,
and Testers
Burning
Advanced
TECHNOLOGY
System Tests
Integration Tests
Unit Tests
Selenium UI and Services
Inter-Module Contract Tests
TDD, Conversation-based tests
Testing Pyramid
WE BUILT IT
NO ONE CAME
3Acme’s
Collaboration
ComputingPlatform
The Aftermath
System Tests
Integration Tests
Unit Tests
Testing Pyramid
System Tests
Integration Tests
Unit Tests
Testing Pyramid
Interface Risk
Orchestration Risk
Functional Risk
System Tests
Integration Tests
Unit Tests
Testing Pyramid
Interface Risk
Orchestration Risk
Functional Risk
User Tests
Market Risk
Interface Risk
Orchestration Risk
Functional Risk
Market Risk
Testing Scales
Interface Risk
Orchestration Risk
Functional Risk
Market Risk
Testing Scales
System Tests
Integration Tests
User Tests
Unit Tests
4Widget eCommerce
Monolith’s
Sell-a-majig
4
Expandthe
Widget Ecommerce
platformwithmoreproducts
yet another
ECOMMERCE
project
lots of captive
USERS
Interface Risk
Orchestration Risk
Functional Risk
Market Risk
Testing Scales
Interface
Orchestration
Functional
Market
Testing Scales
System Tests
Integration Tests
User Tests
Unit Tests
it shipped
UGLY
customers kept
BUYING
Prints Money
the dirty old duct-taped machine that
tm
4Widget eCommerce
Monolith’s
Sell-a-majig
The Aftermath
Monolith ECommerce Acme Collaboration
Information Technology
Uninteresting
Fragile Technology
Poorly Tested
Success!
Engineering
Advancing
Latest Technology
Well Tested
Failure!
Monolith ECommerce Acme Collaboration
Success! Failure!
High RiskLow Risk
SYSTEM
Purpose
Criticality
Lifespan
Frequency
CONFIDENCE
5
My Startup
5findandfix JavaScriptbugs
in modernweb applications
…andbuilda betterweb
{Track:js}
http://trackjs.com
JavaScript Error Monitoring
User Activity
AJAX Requests
Console Logging
Browser Context
Inline Source
Interface Risk
Orchestration Risk
Functional Risk
Market Risk
Testing Scales
My Money!
This time it’s
Launch Fast
and measure
Simple
Decoupled
Obvious
Abstract
&
&
Plumbing Services
Interface Risk
Orchestration Risk
Functional Risk
Market Risk
Testing Scales
System Tests
Integration Tests
User Tests
Unit Tests
Service
Model
Test Fixture
Other
Services
Wrapper Data
Unit
Test
Integration
Test
Testing Structure
“beta”
Service
Dragons be
here!
Testing Structure
Canary
Users
Analytics
Monitoring
FAST TO FIXis almost as good as
NEVER BROKEN
(and sometimes better)
PROJECTS
SOFTWARE TESTING
and what they taught me about
5
1
Big Todd’s
Awesome CRM
METRICS
don’t test to hit
2
Big Corp’s
Video Academy
BREAKING
test what is
3
Acme’s
Collaboration
ComputingPlatform
SCARIEST
test the
thing first
4
Widget eCommerce
Monolith’s
Sell-a-majig
CUSTOMER USE
tests can’tsubstitutefor
5
JavaScriptError Tracking
TrackJS’s
MONITORING
can substitutefor tests
{Track:js}
http://trackjs.com
JavaScript Error Monitoring
TERRIBLE
TESTING
case studies in
toddhgardner!
" todd@trackjs.com

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