To simulate user action, it uses SendKey API, or directly simulating WM_CHAR or WM_KEYDOWN notification. For example, use WM_GETTEXT or GetWindowText to read Window title, or use GetWindowRect to read location of a button. It sends/posts Windows Message or uses API to validate the target. Usually the test client use FindWindowEx and EnumWindow to iterate window and sub control, until the testing target is identified. There are only three parts: Win32 API, Windows Message and Windows Hook. The UI element through the development life cycle is always HWND and Windows Message. No matter MFC, VCL or VB6 is used, Win32 SDK is the core. As DirectX is mainly targeting on special field like game and CAD, I will not include it here. Win32 SDK and Windows Messageīefore CLR there are merely two techs for UI development: Win32 SDK or DirectX. It refers validating UI element property, like window title, listbox elements, status of checkbox. It may involve simulating IME input, combination input or user habit like input speed. It refers simulating user input, like mouse, keyboard and touch screen. In other words, the basic step is to navigate the UI tree, from root desktop to the sub-controls, until the target UI element is identified. To continue test the menu, it requires identification of the location of menu bar, and obtaining the second level of menu item. For example, to test calc.exe (calculator), the first step is to distinguish the calculator window from other window like notepad. It refers the process to identify target UI element. Usually UI Automation involves the following three parts: UI Automation refers controlling a UI application form another application by simulating user actions. Part1: The revolution of UI Automation technology The second part addresses the lasted UIA in detail The first part introduces the technology revolution.
This doc describes UI Automation technology on Windows platform in two parts. The relative UI Automation testing technology changes as well. The desktop development technology revolved from Win32 SDK.
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