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@@ -10,7 +10,7 @@ own integrations.</li><li class="listitem">Acceptance tests (in JUnit 4, JUnit 5
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of the API is compliant with the contract (<span class="emphasis"><em>server tests</em></span>). A full test is generated by
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Spring Cloud Contract Verifier.</li></ul></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_history" href="#_history"></a>2.1 History</h2></div></div></div><p>Before becoming Spring Cloud Contract, this project was called <a class="link" href="https://github.com/Codearte/accurest" target="_top">Accurest</a>.
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It was created by <a class="link" href="https://twitter.com/mgrzejszczak" target="_top">Marcin Grzejszczak</a> and <a class="link" href="https://twitter.com/jkubrynski" target="_top">Jakub Kubrynski</a>
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from (<a class="link" href="http://codearte.io" target="_top">codearte.io</a>.</p><p>The <code class="literal">0.1.0</code> release took place on 26 Jan 2015 and it became stable with <code class="literal">1.0.0</code> release on 29 Feb 2016.</p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_why_a_contract_verifier" href="#_why_a_contract_verifier"></a>2.2 Why a Contract Verifier?</h2></div></div></div><p>Assume that we have a system consisting of multiple microservices:</p><div class="informalfigure"><div class="mediaobject"><img src="https://raw.githubusercontent.com/spring-cloud/spring-cloud-contract/master/docs/src/main/asciidoc/images/Deps.png" alt="Microservices Architecture"></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_testing_issues" href="#_testing_issues"></a>2.2.1 Testing issues</h3></div></div></div><p>If we wanted to test the application in top left corner to determine whether it can
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from (<a class="link" href="https://github.com/Codearte" target="_top">Codearte</a>.</p><p>The <code class="literal">0.1.0</code> release took place on 26 Jan 2015 and it became stable with <code class="literal">1.0.0</code> release on 29 Feb 2016.</p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_why_a_contract_verifier" href="#_why_a_contract_verifier"></a>2.2 Why a Contract Verifier?</h2></div></div></div><p>Assume that we have a system consisting of multiple microservices:</p><div class="informalfigure"><div class="mediaobject"><img src="https://raw.githubusercontent.com/spring-cloud/spring-cloud-contract/master/docs/src/main/asciidoc/images/Deps.png" alt="Microservices Architecture"></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_testing_issues" href="#_testing_issues"></a>2.2.1 Testing issues</h3></div></div></div><p>If we wanted to test the application in top left corner to determine whether it can
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communicate with other services, we could do one of two things:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">Deploy all microservices and perform end-to-end tests.</li><li class="listitem">Mock other microservices in unit/integration tests.</li></ul></div><p>Both have their advantages but also a lot of disadvantages.</p><p><span class="strong"><strong>Deploy all microservices and perform end to end tests</strong></span></p><p>Advantages:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">Simulates production.</li><li class="listitem">Tests real communication between services.</li></ul></div><p>Disadvantages:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">To test one microservice, we have to deploy 6 microservices, a couple of databases,
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etc.</li><li class="listitem">The environment where the tests run is locked for a single suite of tests (nobody else
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would be able to run the tests in the meantime).</li><li class="listitem">They take a long time to run.</li><li class="listitem">The feedback comes very late in the process.</li><li class="listitem">They are extremely hard to debug.</li></ul></div><p><span class="strong"><strong>Mock other microservices in unit/integration tests</strong></span></p><p>Advantages:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">They provide very fast feedback.</li><li class="listitem">They have no infrastructure requirements.</li></ul></div><p>Disadvantages:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">The implementor of the service creates stubs that might have nothing to do with
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@@ -647,7 +647,7 @@ different ranges of values. To enable ranges of values, you can set regular expr
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matching those values for the consumer side. You can provide the body by means of either
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a map notation or String with interpolations.
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Consult the <a class="xref" href="multi_contract-dsl.html" title="8. Contract DSL">Chapter 8, <i>Contract DSL</i></a> section for more information. We highly recommend using the map notation!</p><div class="tip" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Tip"><tr><td rowspan="2" align="center" valign="top" width="25"><img alt="[Tip]" src="images/tip.png"></td><th align="left">Tip</th></tr><tr><td align="left" valign="top"><p>You must understand the map notation in order to set up contracts. Please read the
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<a class="link" href="http://groovy-lang.org/json.html" target="_top">Groovy docs regarding JSON</a>.</p></td></tr></table></div><p>The previously shown contract is an agreement between two sides that:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p class="simpara">if an HTTP request is sent with all of</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">a <code class="literal">PUT</code> method on the <code class="literal">/fraudcheck</code> endpoint,</li><li class="listitem">a JSON body with a <code class="literal">client.id</code> that matches the regular expression <code class="literal">[0-9]{10}</code> and
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<a class="link" href="https://groovy-lang.org/json.html" target="_top">Groovy docs regarding JSON</a>.</p></td></tr></table></div><p>The previously shown contract is an agreement between two sides that:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p class="simpara">if an HTTP request is sent with all of</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">a <code class="literal">PUT</code> method on the <code class="literal">/fraudcheck</code> endpoint,</li><li class="listitem">a JSON body with a <code class="literal">client.id</code> that matches the regular expression <code class="literal">[0-9]{10}</code> and
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<code class="literal">loanAmount</code> equal to <code class="literal">99999</code>,</li><li class="listitem">and a <code class="literal">Content-Type</code> header with a value of <code class="literal">application/vnd.fraud.v1+json</code>,</li></ul></div></li><li class="listitem"><p class="simpara">then an HTTP response is sent to the consumer that</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">has status <code class="literal">200</code>,</li><li class="listitem">contains a JSON body with the <code class="literal">fraudCheckStatus</code> field containing a value <code class="literal">FRAUD</code> and
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the <code class="literal">rejectionReason</code> field having value <code class="literal">Amount too high</code>,</li><li class="listitem">and a <code class="literal">Content-Type</code> header with a value of <code class="literal">application/vnd.fraud.v1+json</code>.</li></ul></div></li></ul></div><p>Once you are ready to check the API in practice in the integration tests, you need to
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install the stubs locally.</p><p><span class="strong"><strong>Add the Spring Cloud Contract Verifier plugin.</strong></span></p><p>We can add either a Maven or a Gradle plugin. In this example, you see how to add Maven.
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@@ -742,7 +742,7 @@ make the name of the base test class. In our case, the contracts were placed und
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<code class="literal">src/test/resources/contracts/fraud</code>. Since you do not have two packages starting from
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the <code class="literal">contracts</code> folder, pick only one, which should be <code class="literal">fraud</code>. Add the <code class="literal">Base</code> suffix and
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capitalize <code class="literal">fraud</code>. That gives you the <code class="literal">FraudBase</code> test class name.</p></td></tr></table></div><p>All the generated tests extend that class. Over there, you can set up your Spring Context
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or whatever is necessary. In this case, use <a class="link" href="http://rest-assured.io/" target="_top">Rest Assured MVC</a> to
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or whatever is necessary. In this case, use <a class="link" href="https://github.com/rest-assured/rest-assured" target="_top">Rest Assured MVC</a> to
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start the server side <code class="literal">FraudDetectionController</code>.</p><pre class="programlisting"><span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">/*
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* Copyright 2013-2019 the original author or authors.
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*
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@@ -839,5 +839,5 @@ achieving the same thing by changing the properties.</p><pre class="programlisti
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<span xmlns:d="http://docbook.org/ns/docbook" class="hl-attribute"> repositoryRoot</span>: https://repo.spring.io/libs-snapshot</pre><p>That’s it!</p></div></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_dependencies" href="#_dependencies"></a>2.6 Dependencies</h2></div></div></div><p>The best way to add dependencies is to use the proper <code class="literal">starter</code> dependency.</p><p>For <code class="literal">stub-runner</code>, use <code class="literal">spring-cloud-starter-stub-runner</code>. When you use a plugin, add
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<code class="literal">spring-cloud-starter-contract-verifier</code>.</p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_additional_links" href="#_additional_links"></a>2.7 Additional Links</h2></div></div></div><p>Here are some resources related to Spring Cloud Contract Verifier and Stub Runner. Note
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that some may be outdated, because the Spring Cloud Contract Verifier project is under
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constant development.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_spring_cloud_contract_video" href="#_spring_cloud_contract_video"></a>2.7.1 Spring Cloud Contract video</h3></div></div></div><p>You can check out the video from the Warsaw JUG about Spring Cloud Contract:</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_readings" href="#_readings"></a>2.7.2 Readings</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><a class="link" href="https://www.slideshare.net/MarcinGrzejszczak/stick-to-the-rules-consumer-driven-contracts-201507-confitura" target="_top">Slides from Marcin Grzejszczak’s talk about Accurest</a></li><li class="listitem"><a class="link" href="http://toomuchcoding.com/blog/categories/accurest/" target="_top">Accurest related articles from Marcin Grzejszczak’s blog</a></li><li class="listitem"><a class="link" href="http://toomuchcoding.com/blog/categories/spring-cloud-contract/" target="_top">Spring Cloud Contract related articles from Marcin Grzejszczak’s blog</a></li><li class="listitem"><a class="link" href="http://groovy-lang.org/json.html" target="_top">Groovy docs regarding JSON</a></li></ul></div></div></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_samples" href="#_samples"></a>2.8 Samples</h2></div></div></div><p>You can find some samples at
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constant development.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_spring_cloud_contract_video" href="#_spring_cloud_contract_video"></a>2.7.1 Spring Cloud Contract video</h3></div></div></div><p>You can check out the video from the Warsaw JUG about Spring Cloud Contract:</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_readings" href="#_readings"></a>2.7.2 Readings</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><a class="link" href="https://www.slideshare.net/MarcinGrzejszczak/stick-to-the-rules-consumer-driven-contracts-201507-confitura" target="_top">Slides from Marcin Grzejszczak’s talk about Accurest</a></li><li class="listitem"><a class="link" href="https://toomuchcoding.com/blog/categories/accurest/" target="_top">Accurest related articles from Marcin Grzejszczak’s blog</a></li><li class="listitem"><a class="link" href="https://toomuchcoding.com/blog/categories/spring-cloud-contract/" target="_top">Spring Cloud Contract related articles from Marcin Grzejszczak’s blog</a></li><li class="listitem"><a class="link" href="https://groovy-lang.org/json.html" target="_top">Groovy docs regarding JSON</a></li></ul></div></div></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_samples" href="#_samples"></a>2.8 Samples</h2></div></div></div><p>You can find some samples at
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<a class="link" href="https://github.com/spring-cloud-samples/spring-cloud-contract-samples" target="_top">samples</a>.</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="multi__spring_cloud_contract.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="multi__spring_cloud_contract_faq.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">1. Spring Cloud Contract </td><td width="20%" align="center"><a accesskey="h" href="multi_spring-cloud-contract.html">Home</a></td><td width="40%" align="right" valign="top"> 3. Spring Cloud Contract FAQ</td></tr></table></div></body></html>
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