Qt Quick Test Reference Documentation | Qt 5.4

- Qt 5.4
- Qt Quick Test Reference Documentation
- Qt 5.4.2 Reference Documentation

# Qt Quick Test Reference Documentation

## Introduction

Qt Quick Test is a unit test framework for QML applications. Test cases are written as JavaScript functions within a TestCase type:

    import QtQuick 2.3
    import QtTest 1.0

    TestCase {
        name: "MathTests"

        function test_math() {
            compare(2 + 2, 4, "2 + 2 = 4")
        }

        function test_fail() {
            compare(2 + 2, 5, "2 + 2 = 5")
        }
    }

Functions whose names start with `test_` are treated as test cases to be executed. See the documentation for the TestCase and SignalSpy types for more information on writing test cases.

## Running Tests

Test cases are launched by a C++ harness that consists of the following code:

    #include <QtQuickTest/quicktest.h>
    QUICK_TEST_MAIN(example)

Where "example" is the identifier to use to uniquely identify this set of tests. You should add `CONFIG += qmltestcase`. for example:

    TEMPLATE = app
    TARGET = tst_example
    CONFIG += warn_on qmltestcase
    SOURCES += tst_example.cpp

The test harness scans the specified source directory recursively for "tst_*.qml" files. If `QUICK_TEST_SOURCE_DIR` is not defined, then the current directory will be scanned when the harness is run. Other *.qml files may appear for auxillary QML components that are used by the test.

The `-input` command-line option can be set at runtime to run test cases from a different directory. This may be needed to run tests on a target device where the compiled-in directory name refers to a host. For example:

    tst_example -input /mnt/SDCard/qmltests

It is also possible to run a single file using the `-input` option. For example:

    tst_example -input data/test.qml

    tst_example -input <full_path>/test.qml

Note: Specifying the full path to the qml test file is for example needed for shadow builds.

If your test case needs QML imports, then you can add them as `-import` options to the test program command-line by adding the following line to your .pro file:

    IMPORTPATH += $$PWD/../imports/my_module1 $$PWD/../imports/my_module2

The `-functions` command-line option will return a list of the current tests functions. It is possible to run a single test function using the name of the test function as an argument. For example:

    tst_example Test_Name::function1

The `-help` command-line option will return all the options available.

    tst_example -help