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What You see iswhat You get

Rafał Łojek

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The making oftestsPatterns

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What You see is what You getHow testing tools and level can change the way You see the system

Rafał Łojek

5 November 2015

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Outline

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The making of testsPatternsToolsTest Flow

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Who Am I? And Who I Am not.

I’m not a professional software testerI’m far from being a project managerI’m not a business analystI am a software developer

a Java coderNot so super promasta killer programmerjust a good programmer

with a set of useful professional habits

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What You See

Is What You Get

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WYSIWGNot always :/

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Working ExampleSometimes it is a matter of perception...

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Working ExampleSome times a point of view...

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Working ExampleOften our own actions...

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Why test are written?

I To have code testedI Live documentationI Executable specificationI The ultimate source of truthI Examples of API useI Acceptance criteria

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Expectations

I ExpressionI Human readableI Adequate Abstraction level

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Expectations

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Expectations

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Feature: Convert temperature from Celsius to Fahrenheit

Coupling ConverHannoverter with Formatter should produce human friendly outputwith sign +/- at the begging and two digits precession.

Scenario: Easter egg messageTest Easter egg message when a user want to convert temperature 666 Celsius.Given Temperature is 666When is convertedThen I should see formatted output "Feels like home"

Scenario Outline: Convert characteristic pointsFor characteristic points on Fahrenheit scale conversation should guaranteecorrect function for whole valid range.Given Temperature is <Celsius>When is convertedThen I should see formatted output "<Fahrenheit>"

HannoverExamples: Check points for temperature| Celsius | Fahrenheit || 0 | +32,00 || 100 | +212,00 || -273 | -459,40 || -1000 | -459,40 |

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@RunWith(Enclosed.class)public class TemperatureFormatterSeparatedTest {

@RunWith(Parameterized.class)public static class FormatterCharacteristicPoints {

TemperatureFormatter cut = new TemperatureFormatter();content...

@Parameterspublic static Collection<Object[]> data() {

return Arrays.asList(new Object[][]{{0, "+32,00"},{100, "+212,00"},{-273, "-459,40"},{-1000, "-459,40"}

@Parameterpublic double tempInCelsius;@Parameter(value = 1)public String requiredFormattedOutput;

content...@Testpublic void shouldConvertTemperatureToRequiredFormattedOutput() throws

Exception {

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@Testpublic void shouldConvertTemperatureToRequiredFormattedOutput() throws

Exception {double temperatureInFahcontent...renheit = new

CelsiusToFahrenheit().convert(tempInCelsius);String formattedTemperature =

cut.formatTemperature(temperatureInFahrenheit);assertThat(formattedTemperature,

is(equalTo(requiredFormattedOutput)));}

public static class EasterEggConversation {TemperatureFormatter cut = new TemperatureFormatter();

@Testpublic void shouldReturnFeelsLikeHomeWhenTempIs666() throws Exception {

double temperatureInFahrenheit = newCelsiusToFahrenheit().convert(666.0);

String formattedTemperature =cut.formatTemperature(temperatureInFahrenheit);

assertThat(formattedTemperature, is("Feels like home"));}

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Pyramids of test levels

Unit tests

Integration

System

Class / Method

Module / Interfaces

System / Module

UI / System

Number of

Run frequency

Impact

Workload

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Test making patternsLet’s rise some hands

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Working ExampleTDD

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Working ExampleATDD

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Working ExampleBDD

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Working ExampleBlack Box Testing

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Working ExampleSpecification by example

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Working ExampleData Driven

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Working ExampleTests after the code

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No tests!

The Customer will test for us

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Mongol Hordes Methodology

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Mongol Hordes Methodology

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Frameworks

Unit Testing ATDD/BDD Integration/System/ATDDxUnit library Cucumber Fitnesse

TestNG Spock Robot FrameworkJBehave Selenium

Concordion SikuliGatling IO

Any kind of scripting that do the job!

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Working Example3 Steps Of Any Test

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Set up the test

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Execute test action

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Assert results of a test action

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Assert!

Seriously! Assert!Check mock interactions,exceptions thrown

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Assert Not Null – Punk!

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To sum up

I Test level can change the perspectiveI Do not limit your self to one toolI Write technical way about technical aspect switch

to higher expression level for higher aspectsI Make your tests valid and valuable

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To sum up

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To sum up

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To sum up

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To sum up...

Always ask questions

Are we doing the right thing?

In the right way?

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To sum up...

In the right way?

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To sum up...

In the right way?

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Working ExampleHave somelive demo...

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THE END

FINNo production code was killed or harmed in the making of this presentation

patterns tools test flow - cdn2-ecros.pl · patterns tools test flow end thoughts working example...

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