Opa = function(extensionObject) {
		/**
		 * "and" property for chaining actions and assertions
		 * @type {this}
		 * @public
		 */
		this.and = this;
		extend(this, extensionObject);
	}
This class will help you write acceptance tests in one page or single page applications.
You can wait for certain conditions to be met.

@class One Page Acceptance testing.
@public
@alias sap.ui.test.Opa
@author SAP SE
@since 1.22

@param {object} [extensionObject] An object containing properties and functions. The newly created Opa will be extended by these properties and functions using jQuery.extend.