Spocktacular Testing - Speaker Deck

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Copyright © 2014 Russel Winder 9 Testing ● Unit: ● Test the classes, functions and methods to ensure they do what we need them to. ● As lightweight and fast as possible. ● Run all tests always. ● Integration and system: ● Test combinations or the whole thing to make sure the functionality is as required. ● Separate process to create a sandbox . “ ” ● If cannot run all tests always, create smoke tests.

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Copyright © 2014 Russel Winder 11 Unit Test @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification import helloWorld class Test_HelloWorld extends Specification { def 'ensure the message function returns hello world'() { expect: helloWorld.message() == 'Hello World.' } }

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Copyright © 2014 Russel Winder 12 System Test @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification class Test_HelloWorld extends Specification { def 'executing the script results in hello world on the standard output'() { given: def process = 'helloWorld.groovy'.execute() expect: process.waitFor() == 0 process.in.text == 'Hello World.\n' } }

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Copyright © 2014 Russel Winder 14 Code under Test package uk.org.winder.spockworkshop; class HelloWorld { private static String message() { return "Hello World."; } public static void main(final String[] args) { System.out.println(message()); } } HelloWorld.java

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Copyright © 2014 Russel Winder 15 Unit Test package uk.org.winder.spockworkshop import spock.lang.Specification class Test_HelloWorld extends Specification { def 'ensure the message function returns hello world'() { expect: HelloWorld.message() == 'Hello World.' } }

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Copyright © 2014 Russel Winder 16 Project Structure . ├── build.gradle └── src ├── main │ └── java │ └── uk │ └── org │ └── winder │ └── spockworkshop │ └─- HelloWorld.java └── test └── groovy └── uk └── org └── winder └── spockworkshop └── unitTest_helloWorld.groovy

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Copyright © 2014 Russel Winder 17 Build Gradle — apply plugin: 'groovy' apply plugin: 'application' repositories { mavenCentral() } dependencies { testCompile 'org.spockframework:spock-core:0.7-groovy-2.0' } mainClassName = 'uk.org.winder.spockworkshop.HelloWorld'

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Copyright © 2014 Russel Winder 24 Unit Test @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification import helloWorld class Test_HelloWorld extends Specification { def 'ensure the message function returns hello world'() { expect: helloWorld.message() == 'Hello World.' } }

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Copyright © 2014 Russel Winder 26 Unit Testing It @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification import Stuff class TestStuff extends Specification { def 'check stuff'() { given: def stuff = new Stuff() expect: stuff.data == [] when: stuff << 6 then: stuff.data == [6] when: stuff << 6 then: stuff.data == [6, 6] } def 'check other stuff'() { given: def stuff = new Stuff() expect: stuff.data == [] when: stuff.leftShift(6) then: stuff.data == [6] when: stuff.leftShift(6) then: stuff.data == [6, 6] } }

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Copyright © 2014 Russel Winder 32 Unit Test Code #! /usr/bin/env groovy @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification import spock.lang.Unroll class idTest extends Specification { @Unroll def 'the id eval function always return the value of the parameter'() { given: final id = new Id () expect: id.eval(i) == i where: i << [0, 1, 2, 3, 's', 'ffff', 2.05] } }

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Copyright © 2014 Russel Winder 34 Unit Test Variant 1 — #! /usr/bin/env groovy @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification import spock.lang.Unroll class functionsTest_alt_1 extends Specification { @Unroll def 'square always returns the square of the numeric parameter'() { expect: Functions.square(x) == r where: x << [0, 1, 2, 3, 1.5] r << [0, 1, 4, 9, 2.25] } }

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Copyright © 2014 Russel Winder 35 Unit Test Variant 2 — #! /usr/bin/env groovy @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification import spock.lang.Unroll class functionsTest_alt_1 extends Specification { @Unroll def 'square always returns the square of the numeric parameter'() { expect: Functions.square(x) == r where: [x, r] << [[0. 0], [1, 1], [2, 4], [3, 9], [1.5, 2.25]] } }

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Copyright © 2014 Russel Winder 36 Unit Test Tabular — #! /usr/bin/env groovy @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification import spock.lang.Unroll class functionsTest_alt_1 extends Specification { @Unroll def 'square always returns the square of the numeric parameter'() { expect: Functions.square(x) == r where: x | r 0 | 0 1 | 1 2 | 4 3 | 9 1.5 | 2.25 } }

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Copyright © 2014 Russel Winder 40 Unit Test #! /usr/bin/env groovy @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification class ExceptionalTest extends Specification { def 'trying something always results in an exception'() { given: final e = new Exceptional () when: e.trySomething() then: thrown(RuntimeException) } }

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Copyright © 2014 Russel Winder 46 Specify Behaviours 1/4 – @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification class StackSpecification extends Specification { def 'newly created stacks are empty'() { given: 'a newly created stack' expect: 'the resulting stack to be empty.' }

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Copyright © 2014 Russel Winder 47 def 'removing an item from a non-empty stack gives a value and changes the stack.'() { given: 'a new stack' and: 'an item to put on the stack' when: 'the item is added' then: 'the stack is not empty' when: 'an item is removed' then: 'the item we retrieved is the original and the stack is empty' } } Specify Behaviours 2/4 –

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Copyright © 2014 Russel Winder 48 Specify Behaviours 3/4 – @Grab('org.spockframework:spock-core:0.7-groovy-2.0') import spock.lang.Specification class StackSpecification extends Specification { def 'newly created stacks are empty'() { given: 'a newly created stack' def stack = new Stack () expect: 'the resulting stack to be empty.' stack.size() == 0 }

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Copyright © 2014 Russel Winder 49 def 'removing an item from a non-empty stack gives a value and changes the stack.'() { given: 'a new stack' def stack = new Stack () and: 'an item to put on the stack' def item = 25 and: 'a variable to store the result of activity' def result when: 'the item is added' stack.push(item) then: 'the stack is not empty' stack.size() == 1 when: 'an item is removed' result = stack.pop() then: 'the item we retrieved is the original and the stack is empty' result == item && stack.size() == 0 } } Specify Behaviours 4/4 –