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