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#466, #509: Added diagrams and Readme files

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nikhilbarar
2018-06-13 23:40:36 +05:30
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---
layout: pattern
title: Component Object
folder: component-object
permalink: /patterns/component-object/
categories: Testing
tags:
- Java
- Difficulty-Intermediate
---
## Intent
Web development is shifting more and more towards reusable components. Frameworks like React, Polymer, Angular etc. provide various component friendly abstractions to make front-end code-bases more maintainable. So our web applications are now full of “widgets” that have same behavior. We can use component various times on single web page or re-use it on various web pages. Therefore it is logical to create abstraction which covers functionality of single component and reuse it across end-to-end tests.
![alt text](./etc/component-object.png "Component Object Pattern")
## Applicability
Use the Component Object Pattern in the following situations:
* When you have various same components on single web page and you need to test the web page
* When you have multiple web pages using same component abstractions and you need to test the web pages
## Credits
* [Component Object](https://lkrnac.net/blog/2016/10/component-object-pattern-example/)

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<?xml version="1.0" encoding="UTF-8"?>
<class-diagram version="1.2.2" icons="true" automaticImage="PNG" always-add-relationships="false" generalizations="true"
realizations="true" associations="true" dependencies="false" nesting-relationships="true" router="FAN">
<class id="1" language="java" name="com.iluwatar.component.AddItemComponent" project="component-object"
file="/component-object/src/test/java/com/iluwatar/component/AddItemComponent.java" binary="false"
corner="BOTTOM_RIGHT">
<position height="-1" width="-1" x="162" y="206"/>
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
sort-features="false" accessors="true" visibility="true">
<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</display>
</class>
<class id="2" language="java" name="com.iluwatar.component.ItemsListComponent" project="component-object"
file="/component-object/src/test/java/com/iluwatar/component/ItemsListComponent.java" binary="false"
corner="BOTTOM_RIGHT">
<position height="-1" width="-1" x="995" y="195"/>
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
sort-features="false" accessors="true" visibility="true">
<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</display>
</class>
<class id="3" language="java" name="com.iluwatar.component.TodoPageObject" project="component-object"
file="/component-object/src/test/java/com/iluwatar/component/TodoPageObject.java" binary="false"
corner="BOTTOM_RIGHT">
<position height="-1" width="-1" x="555" y="198"/>
<display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
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<attributes public="true" package="true" protected="true" private="true" static="true"/>
<operations public="true" package="true" protected="true" private="true" static="true"/>
</display>
</class>
<association id="4">
<end type="SOURCE" refId="3" navigable="false">
<attribute id="5" name="addTodoItemComponent"/>
<multiplicity id="6" minimum="0" maximum="1"/>
</end>
<end type="TARGET" refId="1" navigable="true"/>
<display labels="true" multiplicity="true"/>
</association>
<association id="7">
<end type="SOURCE" refId="3" navigable="false">
<attribute id="8" name="groceryItemsList"/>
<multiplicity id="9" minimum="0" maximum="1"/>
</end>
<end type="TARGET" refId="2" navigable="true"/>
<display labels="true" multiplicity="true"/>
</association>
<association id="10">
<end type="SOURCE" refId="3" navigable="false">
<attribute id="11" name="todoItemsList"/>
<multiplicity id="12" minimum="0" maximum="1"/>
</end>
<end type="TARGET" refId="2" navigable="true"/>
<display labels="true" multiplicity="true"/>
</association>
<association id="13">
<end type="SOURCE" refId="3" navigable="false">
<attribute id="14" name="addGroceryItemComponent"/>
<multiplicity id="15" minimum="0" maximum="1"/>
</end>
<end type="TARGET" refId="1" navigable="true"/>
<display labels="true" multiplicity="true"/>
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<classifier-display autosize="true" stereotype="true" package="true" initial-value="false" signature="true"
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<operations public="true" package="true" protected="true" private="true" static="true"/>
</classifier-display>
<association-display labels="true" multiplicity="true"/>
</class-diagram>