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<!doctype html>
<html lang="en" xmlns="http://www.w3.org/1999/html" xmlns="http://www.w3.org/1999/html">
<head>
<meta charset="utf-8">
<title>Atmosphere 2014 / SPOCK - unbearable lightweight testing</title>
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/nap.css" id="theme">
<!-- For syntax highlighting -->
<link rel="stylesheet" href="lib/css/googlecode.css">
<!-- Full screan IMG -->
<link rel="stylesheet" href="plugin/fullscrean/fullscreen-img.css">
<!-- If the query includes 'print-pdf', use the PDF print sheet -->
<script>
document.write('<link rel="stylesheet" href="css/print/' + (window.location.search.match(/print-pdf/gi) ? 'pdf' : 'paper') + '.css" type="text/css" media="print">');
</script>
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section class="title-slide">
<h1>SPOCK</h1>
<h3>lightweight testing</h3>
<table id="slimTable">
<tr> <td>Paweł Szymczyk </td> </tr>
<tr> <td>Bartosz Walacik </td> </tr>
</table>
</section>
<!-- Paweł -->
<section>
<h3>Let's Spock</h3>
Spock is currently the best<sup>*</sup> testing & specification framework
for
<code><strong>Java</strong></code>
and <code><strong>Groovy</strong></code>
<br/>
<br/>
<small style="color: gray"><sup>*</sup>let me know if you know better one</small>
</section>
<!-- Bartek -->
<section>
<h3>What Spock can do for me?</h3>
<ul class="unstyled">
<li class="fragment"><div class="label_mid">+10</div> to Velocity </li>
<li class="fragment"><div class="label_mid">+5</div> to Code Readability </li>
<li class="fragment"><div class="label_mid">+10</div> to Documentation </li>
<li class="fragment"><div class="label_mid">+10</div> to Coverage </li>
<li class="fragment"><div class="label_mid">-5</div> to Code Repetition </li>
<!--<li class="fragment"><strong><div class="label_mid">+50</div> to Fun</strong> </li>-->
</ul>
</section>
<!-- Paweł -->
<section fullscreen-img="img/50_to_fun.jpg" fullscreen-size="contain">
</section>
<!-- Paweł -->
<section>
<h3>Agenda</h3>
<ul>
<li>theory</li>
<li>code samples</li>
<li>live coding</li>
</ul>
</section>
<!-- Paweł -->
<section>
<h2>Beyond TDD</h2>
</section>
<!-- Paweł -->
<section>
<h3>TDD disadvantages</h3>
<table id="slimTable">
<tr>
<td>code oriented</td>
</tr>
<tr>
<td>free-style</td>
</tr>
<tr>
<td>unreadable to humans</td>
</tr>
</table>
</section>
<!-- Bartek -->
<section>
<h3>Specification by example
<br/> Fit
</h3>
<img src="img/fit_example.png" />
src: <i>Bridging the Communication Gap</i> - Gojko Adzic
</section>
<!-- Bartek -->
<section>
<h3>Classical BDD <br/> JBehave</h3>
<pre style="font-family: monospace;">
<span class="hljs-keyword">Scenario:</span> trader is not alerted below threshold
<span class="hljs-keyword">Given</span> a stock of symbol STK1 and a threshold of 10.0
<span class="hljs-keyword">When</span> the stock is traded at 5.0
<span class="hljs-keyword">Then</span> the alert status should be OFF
</pre>
<small><span style="font-family: monospace;">Glue code required :( </span></small>
</section>
<!-- Paweł -->
<section>
<h3>Specification based BDD<br/>Spock</h3>
<pre><code>def "HashMap accepts null key"() {
given:
def map = new HashMap()
when:
map.put(null, "elem")
then:
notThrown(NullPointerException)
}</code></pre>
<span style="font-family: monospace;">No glue code :) </span>
</section>
<!-- Paweł -->
<section>
<table>
<tr>
<td class="unstyled">
<table id="rowsTable">
<tr>
<th>Approach</th>
<th>Input</th>
<th>Business Readability</th>
<th>Frameworks</th>
</tr>
<tr>
<td><code>Spec-based</code> <code>BDD</code></td>
<td>specification</td>
<td>moderate</td>
<td><a href="http://docs.spockframework.org">Spock</a><br/>
<small><a href="http://jasmine.github.io/">Jasmine JS</a></small>
</td>
</tr>
<tr>
<td><code>Classical BDD</code></td>
<td>user story</td>
<td>excellent</td>
<td><small><a href="http://jbehave.org/">JBehave</a>,
<a href="http://cukes.info/">Cucumber</a></small>
</td>
</tr>
<tr>
<td><code>Spec by example</code></td>
<td>examples table</td>
<td>excellent</td>
<td><small><a href="http://www.fitnesse.org">FitNesse</a></small></td>
</tr>
<tr>
<td><code>TDD</code></td>
<td>unit test</td>
<td>forget</td>
<td><small><a>Junit</a>, <a href="http://testng.org">TestNG</a></small></td>
</tr>
</table>
</td>
<td class="unstyled">
<img src="img/drawing_1.svg"/></td>
</tr>
</table>
</section>
<!-- Bartek -->
<section fullscreen-img="img/Human_evolution_scheme_2.png" fullscreen-size="contain">
</section>
<section fullscreen-img="img/Human_evolution_scheme_3.png" fullscreen-size="contain">
</section>
<section fullscreen-img="img/Human_evolution_scheme_4.png" fullscreen-size="contain">
</section>
<section fullscreen-img="img/Human_evolution_scheme_5.png" fullscreen-size="contain">
</section>
<!-- Paweł -->
<section>
<h3>Spock highlights</h3>
<ul>
<li>all-in-one test framework</li>
<li>based on <code>Groovy</code> </li>
<li>easy to learn</li>
<li>uses JUnit runner<br/> so just works with <code>Java IDE, CI & build tools</code>
<li>its beautiful</li>
</ul>
</section>
<!-- Bartek -->
<section>
<h2>Enough! Show me the code</h2>
</section>
<!-- Bartek -->
<section>
<h3>Good JUnit BDD-style test</h3>
<pre><code>public class MapTest {
@Test
public void shouldAddAllItemsFromOneListToAnother() {
//given:
List<String> baseList = Lists.newArrayList("one", "two");
List<String> addMe = Lists.newArrayList("three", "four");
//when:
baseList.addAll(addMe);
//then:
Assert.assertEquals(Arrays.asList("one", "two", "three", "four"),
baseList);
}
}</code></pre>
</section>
<!-- Paweł -->
<section>
<h3>Spock BDD Test</h3>
<pre><code>class MapTest extends Specification {
def "should add all items from one list to another" (){
given:
def baseList = ["one", "two"]
def addMe = ["three", "four"]
when:
baseList.addAll addMe
then:
baseList == ["one", "two", "three", "four"]
}
}</code></pre>
</section>
<!-- Bartek -->
<section>
<h3>Specification</h3>
<pre class="grayCode"><span class="highCode">class MapTest extends Specification</span> {
def "should add all items from one list to another" (){
given:
def baseList = ["one", "two"]
def addMe = ["three", "four"]
when:
baseList.addAll addMe
then:
baseList == ["one", "two", "three", "four"]
}
}</pre>
</section>
<!-- Paweł -->
<section>
<h3>Feature Method</h3>
<pre class="grayCode">class MapTest extends Specification {
<span class="highCode">def "should add all items from one list to another"</span> (){
given:
def baseList = ["one", "two"]
def addMe = ["three", "four"]
when:
baseList.addAll addMe
then:
baseList == ["one", "two", "three", "four"]
}
}</pre>
</section>
<!-- Bartek -->
<section>
<h3>Setup System Under Spec</h3>
<pre class="grayCode">class MapTest extends Specification {
def "should add all items from one list to another" ()
{
<span class="highCode">given:
def baseList = ["one", "two"]
def addMe = ["three", "four"]</span>
when:
baseList.addAll addMe
then:
baseList == ["one", "two", "three", "four"]
}
}</pre>
</section>
<!-- Paweł -->
<section>
<h3>Stimulate</h3>
<pre class="grayCode">class MapTest extends Specification {
def "should add all items from one list to another" (){
given:
def baseList = ["one", "two"]
def addMe = ["three", "four"]</span>
<span class="highCode">when:
baseList.addAll addMe</span>
then:
baseList == ["one", "two", "three", "four"]
}
}</pre>
</section>
<!-- Bartek -->
<section>
<h3>Assert expected response</h3>
<pre class="grayCode">class MapTest extends Specification {
def "should add all items from one list to another" (){
given:
def baseList = ["one", "two"]
def addMe = ["three", "four"]</span>
when:
baseList.addAll addMe</span>
<span class="highCode">then:</span>
assert <span class="highCode">baseList == ["one", "two", "three", "four"]</span>
}
}</pre>
</section>
<section>
<h2>Assertions</h2>
</section>
<section>
<h3>Power Assert</h3>
<pre class="grayCode">
then:
<span class="highCode">vendingMachine.display == "CREDIT 0.30"</span>
....
Condition not satisfied:
vendingMachine.display == "CREDIT 0.30"
| | |
| | false
| | 1 difference (90% similarity)
| | CREDIT 0.(1)0
| | CREDIT 0.(3)0
| CREDIT 0.10
vendingmachine.domain.VendingMachine@2bbf180e
</pre>
</section>
<section>
<h3>Pretty failure messages</h3>
<pre class="grayCode">
then:
vendingMachine.display == "CREDIT 0.30"
....
Condition not satisfied:
<span class="highCode">vendingMachine.display == "CREDIT 0.30"
| | |
| | false
| | 1 difference (90% similarity)
| | CREDIT 0.(1)0
| | CREDIT 0.(3)0
| CREDIT 0.10
vendingmachine.domain.VendingMachine@2bbf180e</span>
</pre>
</section>
<section fullscreen-img="img/reporting_of_failures.png" fullscreen-size="contain">
</section>
<!--################ DATA DRIVEN ############################################################-->
<!-- Bartek -->
<section>
<h2>Data Driven Tests</h2>
</section>
<!-- Paweł -->
<section>
<h3>Data driven</h3>
<pre><code>@Unroll
def """should round #givenValue.class.simpleName #givenValue
to #expectedValue with scale #scale"""() {
when:
def result = Money.round(givenValue, scale)
then:
result == expectedValue
where:
givenValue | scale || expectedValue
0.339d | 2 || 0.34
0.22d | 2 || 0.22
0.1d | 1 || 0.1
new BigDecimal(2.333, DECIMAL32) | 2 || 2.33
}</code></pre>
</section>
<!-- Bartek -->
<section>
<h3>Data Tables</h3>
<pre class="grayCode">@Unroll
def """should round #givenValue.class.simpleName #givenValue
to #expectedValue with scale #scale"""() {
when:
def result = Money.round(givenValue, scale)
then:
result == expectedValue
where:
<span class="highCode">givenValue | scale || expectedValue
0.339d | 2 || 0.34
0.22d | 2 || 0.22
0.1d | 1 || 0.1
new BigDecimal(2.333, DECIMAL32) | 2 || 2.33</span>
}</pre>
</section>
<!-- Paweł -->
<section>
<h3>Data Tables</h3>
<pre class="grayCode">@Unroll
def """should round #givenValue.class.simpleName #givenValue
to #expectedValue with scale #scale"""() {
when:
def result = Money.round(<span class="highCode">givenValue</span>, <span class="highCode">scale</span>)
then:
result == <span class="highCode">expectedValue</span>
where:
<span class="highCode">givenValue</span> | <span class="highCode">scale</span> || <span class="highCode">expectedValue</span>
0.339d | 2 || 0.34
0.22d | 2 || 0.22
0.1d | 1 || 0.1
new BigDecimal(2.333, DECIMAL32) | 2 || 2.33</span>
}</pre>
</section>
<!--Bartek -->
<section>
<h3>Data Tables</h3>
<pre class="grayCode"><span class="highCode">@Unroll</span>
def """should round <span class="highCode">#givenValue.class.simpleName #givenValue</span>
to <span class="highCode">#expectedValue</span> with scale <span class="highCode">#scale</span>"""()</span> {
when:
def result = Money.round(givenValue, scale)
then:
result == expectedValue
where:
<span class="highCode">givenValue</span> | <span class="highCode">scale</span> || <span class="highCode">expectedValue</span>
0.339d | 2 || 0.34
0.22d | 2 || 0.22
0.1d | 1 || 0.1
new BigDecimal(2.333, DECIMAL32) | 2 || 2.33
}</pre>
</section>
<!--#############################################################################################-->
<section fullscreen-img="img/data_driven.png" fullscreen-size="contain">
</section>
<!--####################### VERIFY EXCEPTIONS ################################################-->
<!-- Bartek -->
<section>
<h2>Verify Exceptions</h2>
</section>
<!-- Paweł -->
<section>
<h3>Verify exceptions</h3>
<pre><code>def "should throw exception when try to insert null"() {
given:
def vendingMachine = new VendingMachine(Stub(ProductMagazine),
Stub(CoinCassette))
when:
vendingMachine.insert null
then:
def exception = thrown IllegalArgumentException
exception.message == "coin can't be null"
}</code></pre>
</section>
<!-- Bartek -->
<section>
<h4>it's easy to look into thrown exception</h4>
<pre class="grayCode">def "should throw exception when try to insert null"() {
given:
def vendingMachine = new VendingMachine(Stub(ProductMagazine),
Stub(CoinCassette))
when:
vendingMachine.insert null
then:
<span class="highCode">def exception = thrown IllegalArgumentException
exception.message == "coin can't be null"</span>
}</pre>
</section>
<!--###########################################################################################-->
<!--################ MOCK ###############################################################-->
<!-- Bartek -->
<section>
<h2>Mock vs Stub</h2>
<ul>
<li><b>Mock</b> - is for verifying interactions</li>
<li><b>Stub</b> - provides canned responses
<ul>
<li>we teach <b>Stubs</b>!</li>
</ul>
</li>
</ul>
</section>
<section fullscreen-img="img/mocking_1.png" fullscreen-size="contain">
</section>
<section fullscreen-img="img/mocking_21.png" fullscreen-size="contain">
</section>
<section fullscreen-img="img/mocking_3.png" fullscreen-size="contain">
</section>
<!-- Paweł -->
<section>
<h3>Mock</h3>
<pre><code>def "should check that money fall into coin cassette"() {
given:
def coinCassetteMock = Mock(CoinCassette)
def vendingMachine = new VendingMachine(Stub(ProductMagazine),
coinCassetteMock)
when:
vendingMachine.insert QUARTER
then:
1 * coinCassetteMock.push(QUARTER)
}</code></pre>
</section>
<!-- Bartek -->
<section>
<h3>Mock</h3>
<pre class="grayCode">def "should check that money fall into coin cassette"() {
given:
def <span class="highCode">coinCassetteMock = Mock(CoinCassette)</span>
def vendingMachine = new VendingMachine(Stub(ProductMagazine),
coinCassetteMock)
when:
vendingMachine.insert QUARTER
then:
<span class="highCode">1 * coinCassetteMock.push(QUARTER)</span>
}</pre>
</section>
<!-- Paweł -->
<section>
<h3>Mock</h3>
<pre class="grayCode">def "should check that money fall into coin cassette"() {
given:
def coinCassetteMock = Mock(CoinCassette)
def vendingMachine = new VendingMachine(Stub(ProductMagazine),
coinCassetteMock)
when:
vendingMachine.insert QUARTER
then:
<span class="highCode">1 * coinCassetteMock.push(_ as Coin)</span>
}</pre>
</section>
<!--#################### STUB ##############################################################-->
<!-- Bartek -->
<section>
<h3>Stub</h3>
<pre class="grayCode">def "should return coin when coin cassette is full"() {
given:
<span class="highCode">def coinCassetteMock = Stub(CoinCassette) {
isFull(_ as Coin) >> true
}</span>
def vendingMachine = new VendingMachine(Stub(ProductMagazine),
coinCassetteMock)
when:
def returnedCoin = vendingMachine.insert QUARTER
then:
returnedCoin.get() == QUARTER
}
</pre>
</section>
<!-- Bartek -->
<section>
<h3>Imagine that you have to stub this...</h3>
<pre><code>
interface DummyContainer {
String getString();
Long getLong();
BigDecimal getBigDecimal();
List getList();
VendingMachine getVendingMachine();
DummyContainer getDummyContainer();
}
</code></pre>
</section>
<section>
<img src="img/spock-facepalm.png">
</section>
<!-- Paweł -->
<section>
<h3>Stub default value</h3>
<pre><code>def "should return default value for all not primitive types"() {
when:
def stub = Stub(DummyContainer)
then:
stub.string == ""
stub.long == 0
stub.bigDecimal == 0
stub.list == []
//stubs creates stubs
stub.vendingMachine
stub.vendingMachine.credit == 0
}</code></pre>
</section>
<section>
<img src="img/spock_approves.jpg">
</section>
<!--Groovy Goodness #################################################################################################-->
<section>
<img src="img/groovy-logo-medium.png">
<h1>Goodnes</h1>
</section>
<!--
<section>
<h3>Example number 1</h3>
<pre><code>class DummyUser {
int id
String name
int age
String getName() {
"Mr/Ms $name"
}
}
def "should correctly build DummyUser"() {
when:
def product = new DummyUser(name: "Kazik", age: 18, id: 1)
then:
product.id == 1
product.name == "Mr/Ms Kazik"
product.age == 18
}</code></pre>
</section>
-->
<section>
<h4>No Java baroque</h4>
<pre class="grayCode"><span class="highCode">public</span> class DummyUser {
<span class="highCode">private</span> int id<span class="highCode">;</span>
<span class="highCode">private</span> String name<span class="highCode">;</span>
<span class="highCode">private</span> int age<span class="highCode">;</span>
<span class="highCode">public</span> String getName() {
<span class="highCode">return</span> "Mr/Ms $name"<span class="highCode">;</span>
}
}</pre>
</section>
<section>
<h4>Explicitly shows business logic</h4>
<pre class="grayCode">class DummyUser {
int id
String name
int age
<span class="highCode">String getName() {
"Mr/Ms $name"
}</span>
}</pre> </section>
<section>
<h4>Rich GString api</h4>
<pre class="grayCode">class DummyUser {
int id
String name
int age
String getName() {
"Mr/Ms <span class="highCode">$name</span>"
}
}</pre>
</section>
<section>
<h4>Duck typing</h4>
<pre class="grayCode">def "should correctly build DummyUser"() {
when:
<span class="highCode">def</span> product = new DummyUser(name: "Kazik", age: 18, id: 1)
then:
product.id == 1
product.name == "Mr/Ms Kazik"
product.age == 18</pre>
</section>
<section>
<h4>Al'a Map constructor</h4>
<pre class="grayCode">def "should correctly build DummyUser"() {
when:
def product = <span class="highCode">new DummyUser(name: "Kazik", age: 18, id: 1)</span>
then:
product.id == 1
product.name == "Mr/Ms Kazik"
product.age == 18</pre>
</section>
<section>
<h4>Al'a property access</h4>
<pre class="grayCode">def "should correctly build DummyUser"() {
when:
def product = new DummyUser(name: "Kazik", age: 18, id: 1)</span>
then:
product<span class="highCode">.id</span> == 1
product<span class="highCode">.name</span> == "Mr/Ms Kazik"
product<span class="highCode">.age</span> == 18</pre>
</section>
<section>
<h4>Al'a property access</h4>
<pre class="grayCode">def "should correctly build DummyUser"() {
when:
def product = new DummyUser(name: "Kazik", age: 18, id: 1)</span>
then:
product<span class="highCode">.id</span> == 1
product<span class="highCode">.name</span> == "Mr/Ms Kazik"
product<span class="highCode">.age</span> == 18</pre>
</section>
<section>
<h4>Great JSON support</h4>
<pre class="grayCode">def "should show groovy goodnes"() {
given:
<span class="highCode">def jsonBuilder = new JsonBuilder()
jsonBuilder {
integerList 1, 2, 3, 4, 5
stringsMap {
id1 "Spock"
id2 "TestNG"
id3 "JUnit"
}
}</span>
when:
<span class="highCode">def json = new JsonSlurper().parseText jsonBuilder.toString()</span>
then:
<span class="highCode">json.integerList</span> == [1, 2, 3, 4, 5]
<span class="highCode">json.stringsMap</span> == [id1: "Spock", id2: "TestNG", id3: "JUnit"]
}</pre>
</section>
<section>
<h4>Collections constructors</h4>
<pre class="grayCode">def "should show groovy goodnes"() {
given:
def jsonBuilder = new JsonBuilder()
jsonBuilder {
integerList 1, 2, 3, 4, 5
stringsMap {
id1 "Spock"
id2 "TestNG"
id3 "JUnit"
}
}
when:
def json = new JsonSlurper().parseText jsonBuilder.toString()
then:
json.integerList == <span class="highCode">[1, 2, 3, 4, 5]</span>
json.stringsMap== <span class="highCode">[id1: "Spock", id2: "TestNG", id3: "JUnit"]</span>
}</pre>
</section>
<section>
<h4>Cloujure</h4>
<pre class="grayCode">def "should show groovy goodnes"() {
given:
def jsonBuilder = new JsonBuilder()
<span class="highCode">jsonBuilder {
integerList 1, 2, 3, 4, 5
stringsMap {
id1 "Spock"
id2 "TestNG"
id3 "JUnit"
}
}</span>
when:
def json = new JsonSlurper().parseText jsonBuilder.toString()
then:
json.integerList == [1, 2, 3, 4, 5]
json.stringsMap== [id1: "Spock", id2: "TestNG", id3: "JUnit"]
}</pre>
</section>
<section>
<h4>It's possible to omit parentheses</h4>
<pre class="grayCode">def "should show groovy goodnes"() {
given:
def jsonBuilder = new JsonBuilder()
jsonBuilder {
integerList 1, 2, 3, 4, 5
stringsMap {
id1 "Spock"
id2 "TestNG"
id3 "JUnit"
}
}
when:
def json = new JsonSlurper().parseText<span class="highCode">(</span>jsonBuilder.toString()<span class="highCode">)</span>
then:
json.integerList == [1, 2, 3, 4, 5]
json.stringsMap== [id1: "Spock", id2: "TestNG", id3: "JUnit"]
}</pre>
</section>
<section>
<h3>Groovy</h3>
<ul class="unstyled">
<li class="highCode">is it OK to write large apps in Groovy?</li>
</ul>
<ul>
<li >definitely, it's perfect for writing tests</li>
<li >modern, dynamic, duck typing</li>
<li >less code, do more</li>
<li >no <code>Java</code> Baroque</li>
</ul>
</section>
<section>
<h2>Real life examples:</h2>
<table>
<a href="http://javers.org"><img src="img/javers_big.png"></a>
<h4><a href="https://github.com/javers/javers">github.com/javers/javers</a></h4>
<ul>
<li>426 BDD tests in <span style="font-family: monospace">SPOCK</span></li>
<li>10 444 lines in <span style="font-family: monospace">Java</span> src classes</li>
<li>7 283 lines in <span style="font-family: monospace">Groovy</span> test classes</li>
<li>87% coverage</li>
</ul>
</table>
</section>
<section>
<h2>Dziękujemy za uwagę!</h2>
<h2>Q & A ... </h2>
<br/>
<h3>Contact us</h3>
<table id="slimTable">
<tr> <td>Paweł Szymczyk </td> <td><a href="http://javers.org">javers.org</a></td> <td><a>pawel.szymczyk90@gmail.com</a> </td></tr>
<tr> <td>Bartosz Walacik </td> <td><a href="http://javers.org">javers.org</a></td> <td><a>@BartoszWalacik</a></td></tr>
</table>
<br/>
<br/>
<small><a href="https://github.com/javers/spock-talk-atmosphere-2014">http://github.com/javers/spock-talk-atmosphere-2014</a></small>
</section>