QAbstractItemModelTester Class

The QAbstractItemModelTester class helps testing QAbstractItemModel 子类。更多...

头：	#include <QAbstractItemModelTester>
qmake:	QT += testlib
Since:	Qt 5.11
继承：	QObject

公共类型

enum	FailureReportingMode { QtTest, Warning, Fatal }

公共函数

	QAbstractItemModelTester (QAbstractItemModel * model , QObject * parent = nullptr)
	QAbstractItemModelTester (QAbstractItemModel * model , QAbstractItemModelTester::FailureReportingMode mode , QObject * parent = nullptr)
QAbstractItemModelTester::FailureReportingMode	failureReportingMode () const
QAbstractItemModel *	model () const

31 公共函数继承自 QObject

静态公共成员

const QMetaObject

staticMetaObject

9 静态公共成员继承自 QObject

额外继承成员

1 特性继承自 QObject
1 公共槽继承自 QObject
2 信号继承自 QObject
9 保护函数继承自 QObject

详细描述

The QAbstractItemModelTester class helps testing QAbstractItemModel 子类。

The QAbstractItemModelTester class is a utility class to test item models.

When implementing an item model (that is, a concrete QAbstractItemModel subclass) one must abide to a very strict set of rules that ensure consistency for users of the model (views, proxy models, and so on).

For instance, for a given index, a model's reimplementation of hasChildren() must be consistent with the values returned by rowCount() and columnCount() .

QAbstractItemModelTester helps catching the most common errors in custom item model classes. By performing a series of tests, it will try to check that the model status is consistent at all times. The tests will be repeated automatically every time the model is modified.

QAbstractItemModelTester employs non-destructive tests, which typically consist in reading data and metadata out of a given item model. QAbstractItemModelTester will also attempt illegal modifications of the model. In models which are properly implemented, such attempts should be rejected, and no data should be changed as a consequence.

用法

使用 QAbstractItemModelTester is straightforward. In a test case it is sufficient to create an instance, passing the model that needs to be tested to the constructor:

MyModel *modelToBeTested = ...;
auto tester = new QAbstractItemModelTester(modelToBeTested);

QAbstractItemModelTester will report testing failures through the Qt Test logging mechanisms.

它也是可能的，使用 QAbstractItemModelTester outside of a test case. For instance, it may be useful to test an item model used by an application without the need of building an explicit unit test for such a model (which might be challenging). In order to use QAbstractItemModelTester outside of a test case, pass one of the QAbstractItemModelTester::FailureReportingMode enumerators to its constructor, therefore specifying how failures should be logged.

QAbstractItemModelTester may also report additional debugging information as logging messages under the qt.modeltest logging category. Such debug logging is disabled by default; refer to the QLoggingCategory documentation to learn how to enable it.

注意： While QAbstractItemModelTester is a valid help for development and testing of custom item models, it does not (and cannot) catch all possible problems in QAbstractItemModel subclasses. Notably, it will never perform meaningful destructive testing of a model, which must be therefore tested separately.

另请参阅 模型/视图编程 and QAbstractItemModel .

成员类型文档编制

enum QAbstractItemModelTester:: FailureReportingMode

This enumeration specifies how QAbstractItemModelTester should report a failure when it tests a QAbstractItemModel 子类。

常量	值	描述
`QAbstractItemModelTester::QtTest`	`0`	The failures will be reported through QtTest 's logging mechanism.
`QAbstractItemModelTester::Warning`	`1`	The failures will be reported as warning messages in the `qt.modeltest` logging category.
`QAbstractItemModelTester::Fatal`	`2`	A failure will cause immediate and abnormal program termination. The reason for the failure will be reported using `qFatal()` .

成员函数文档编制

QAbstractItemModelTester:: QAbstractItemModelTester ( QAbstractItemModel * model , QObject * parent = nullptr)

Creates a model tester instance, with the given parent , that will test the model model .

QAbstractItemModelTester:: QAbstractItemModelTester ( QAbstractItemModel * model , QAbstractItemModelTester::FailureReportingMode mode , QObject * parent = nullptr)

Creates a model tester instance, with the given parent , that will test the model model ，使用指定 mode to report test failures.

另请参阅 QAbstractItemModelTester::FailureReportingMode .

QAbstractItemModelTester::FailureReportingMode QAbstractItemModelTester:: failureReportingMode () const

Returns the mode that this instancing is using to report test failures.

另请参阅 QAbstractItemModelTester::FailureReportingMode .

QAbstractItemModel *QAbstractItemModelTester:: model () const

Returns the model that this instance is testing.