Poco ポコ

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A cross-engine UI automation framework. Unity3D/cocos2dx-*/Android native APP/iOS native APP/(Other engines SDK)/…


First you should connect your Android phone, for example, via usb cable and enable the ADB DEBUG MODE.

# coding=utf-8

import time
from poco.drivers.unity3d import UnityPoco

poco = UnityPoco()


shell = poco('shell').focus('center')
for star in poco('star'):

assert poco('scoreVal').get_text() == "100", "score correct."
poco('btn_back', type='Button').click()

More examples here.

Tools for writing test scripts

To retrieve the UI hierarchy of the game, please use our AirtestIDE (an IDE for writing test scripts) or standalone PocoHierarchyViewer (to view the hierarchy and attributes only but lightweight) !



In order to use Poco, you must install Poco python library on your host and also install the poco-sdk in your game/app.

Poco can be installed straightforward with pip command. It is called pocoui.

pip install pocoui

SDK Integration

For poco-sdk integration please refer to Integration Guide


  • supports mainstream game engines, including: Unity3D, cocos2dx-js, cocos2dx-lua, Android/iOS native apps

  • retrieves UI Elements Hierarchy in game’s runtime

  • is super fast and impact-free to the game

  • allows straightforward SDK integration to the game (within in 5 minutes)

  • provides powerful APIs that are engine independent

  • supports multi-touch e.g. fling/pinch/… (and more is coming soon)

  • support gps, accelerometer and gyro sensors, rotation (landscape/portrait) and other sensors as input (coming soon)

  • is extensible to other private engines by implementing poco-sdk .

  • is compatible with Python 2.7 and Python 3.3-3.6.


Online docs.

Use poco on platforms/engines

This section guide you how to start to use poco to write your test cases on different platforms/engines.

Poco drivers

Tutorials and examples

This section will let your know all basic features of poco.

How to use Poco

Poco supports different types of engines by different drivers. For different engines please initialize poco instance by corresponding driver. Remember to connect an Android device to your PC/mac with a running game or launch and keep the game/app active on PC/mac.

Following example shows how to initialize poco instance for

  • Unity3D.

from poco.drivers.unity3d import UnityPoco

poco = UnityPoco()
# for unity editor on windows
# poco = UnityPoco(('localhost', 5001), unity_editor=True)

ui = poco('...')
  • Android native APP

from poco.drivers.android.uiautomation import AndroidUiautomationPoco

poco = AndroidUiautomationPoco()

Working with Poco Objects

Basic Selector

UI element objects can be selected by invoking poco(...) function instance. The function traverses through the render tree structure and selects all the corresponding UI elements matching the query expression.

The function takes one mandatory argument node name, the optional arguments can be substituted too and they refer to specific node properties. For more information, refer to API Reference selecting UI.

# select by node name

# select by name and other properties
poco('bg_mission', type='Button')
poco(textMatches='^据点.*$', type='Button', enable=True)

Relative Selector

When there is any ambiguity in the selected objects by node names/node types or object unable to select, the relative selector tries to select the element object by hierarchy in following manner

# select by direct child/offspring

Sequence Selector

Tree indexing and traversing is performed by default from up to down or from left to right. In case that the ‘not-yet-traversed’ nodes are removed from the screen, the exception is raised. The exception is not raised in case when the ‘already-traversed’ nodes are removed and in this case the traversing continues in previous order despite the fact that the nodes in views were rearranged during the travers process.

items = poco('main_node').child('list_item').offspring('item')

Iterate over a collection of objects

Following code snippet shows how to iterate over the collection of UI objects

# traverse through every item
items = poco('main_node').child('list_item').offspring('item')
for item in items:

Get object properties

Following examples shows how to obtain various properties of an object

mission_btn = poco('bg_mission')
print(mission_btn.attr('type'))  # 'Button'
print(mission_btn.get_text())  # '据点支援'
print(mission_btn.attr('text'))  # '据点支援' equivalent to .get_text()
print(mission_btn.exists())  # True/False, exists in the screen or not

Global Operation

Poco framework also allows to perform the operations without any UI elements selected. These operations are called global operations.


poco.click([0.5, 0.5])  # click the center of screen
poco.long_click([0.5, 0.5], duration=3)


# swipe from A to B
point_a = [0.1, 0.1]
center = [0.5, 0.5]
poco.swipe(point_a, center)

# swipe from A by given direction
direction = [0.1, 0]
poco.swipe(point_a, direction=direction)


Take a screenshot of the current screen in base64 encoded string. The image format depends on the sdk implementation. Take a look at ScreenInterface.getScreen to dive into sdk implementation details.

Note: snapshot is not supported in some engine implementation of poco.

from base64 import b64decode

b64img, fmt = poco.snapshot(width=720)
open('screen.{}'.format(fmt), 'wb').write(b64decode(b64img))


This sections describes the Poco framework errors and exceptions.


from poco.exceptions import PocoTargetTimeout

    poco('guide_panel', type='ImageView').wait_for_appearance()
except PocoTargetTimeout:
    # bugs here as the panel not shown


from poco.exceptions import PocoNoSuchNodeException

img = poco('guide_panel', type='ImageView')
    if not img.exists():
except PocoNoSuchNodeException:
    # If attempt to operate inexistent nodes, an exception will be thrown

Unit Test

Poco is an automation test framework. For unit testing, please refer to PocoUnit section. PocoUnit provides a full set of assertion methods and furthermore, it is also compatible with the unittest in Python standard library.

Tutorial of PocoUnit.

Some Concepts

This section describes some basic concepts of Poco. Basic terminology used in following section

  • Target device: test devices where the apps or games run on, it usually refers to mobile phone devices

  • UI proxy: proxy objects within Poco framework, they represent zero (none), one or multiple in-game UI elements

  • Node/UI element: UI element instances or nodes in app/game

  • query expression: a serializable internal data structure through which Poco interacts with target devices and selects the corresponding UI elements. It is not usually needed to pay much attention to this unless it is required to customize the Selector class.

Following images show the UI hierarchy represented in Poco

../_images/hunter-inspector.png ../_images/hunter-inspector-text-attribute.png ../_images/hunter-inspector-hierarchy-relations.png

Definitions of coordinate system and metric space

Normalized Coordinate System

In normalized coordinate system, the origin (0, 0) lies on top left corner of the device display. The height and the width of the screen are chosen as 1 unit of length, refer to image below for more detailed information. In normalized coordinate system, the same UI elements on the devices with different resolution have always the same position and size. This is especially very handy when writing cross-device test cases.

The space of normalized coordinate system is uniformly distributed, i.e. the coordinates of the screen center are (0.5, 0.5) and the computing method of other scalars and vectors are all same in Euclidean space.


Local Coordinate System (local positioning)

The aim of introducing local coordinate system is to express the coordinates with reference to a certain UI elements. The origin (0,0) of local coordinate system lies on the top left corner of UI bounding box, x-axis goes horizontally rightward direction and y-axis goes vertically downwards. The height and the width of UI element are chosen as 1 unit of length. Coordinates are expressed as signed distances from the origin. Other definitions are same as for normalized coordinate system.

Local coordinate system is more flexible in order to locate the position within or outside of UI element, e.g the coordinates at (0.5, 0.5) corresponds to the center of the UI element while coordinates larger than 1 or less than 0 correspond to the position out of the UI element.

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Any pull requests are welcomed! We will have the code checked carefully. Please make sure the codes are compatible with python 2/3 and have the same coding style.