History

Lucie Gérard ea7a3105de Use SPDX license identifiers Amends commit `05fc3aef53`. Some files were still missing. Task-number: QTBUG-67283 Change-Id: I78b3cbf31138192805b7e186337c6fda4ac844aa Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>		2022-11-15 07:50:17 +00:00
..
qtwasmtestlib.cpp	wasm: add "skip" support to qtwasmtestlib	2022-08-17 04:52:46 +02:00
qtwasmtestlib.h	wasm: add "skip" support to qtwasmtestlib	2022-08-17 04:52:46 +02:00
qtwasmtestlib.js	Use SPDX license identifiers	2022-11-15 07:50:17 +00:00
README.md

README.md

QtWasmTestLib - async auto tests for WebAssembly

QtWasmTestLib supports auto-test cases in the web browser. Like QTestLib, each test case is defined by a QObject subclass with one or more test functions. The test functions may be asynchronous, where they return early and then complete at some later point.

The test lib is implemented as a C++ and JavaScript library, where the test is written using C++ and a hosting html page calls JavaScript API to run the test.

Implementing a basic test case

In the test cpp file, define the test functions as private slots. All test functions must call completeTestFunction() exactly once, or will time out otherwise. Subsequent calls to completeTestFunction will be disregarded. It is advised to use QWASMSUCCESS/QWASMFAIL for reporting the test execution status and QWASMCOMPARE/QWASMVERIFY to assert on test conditions. The call can be made after the test function itself has returned.

class TestTest: public QObject
{
    Q_OBJECT
private slots:
    void timerTest() {
        QTimer::singleShot(timeout, [](){
            completeTestFunction();
         });
    }
};

Then define a main() function which calls initTestCase(). The main() function is async too, as per Emscripten default. Build the .cpp file as a normal Qt for WebAssembly app.

int main(int argc, char **argv)
{
    auto testObject = std::make_shared<TestTest>();
    initTestCase<QCoreApplication>(argc, argv, testObject);
    return 0;
}

Finally provide an html file which hosts the test runner and calls runTestCase()

<!doctype html>
<script type="text/javascript" src="qtwasmtestlib.js"></script>
<script type="text/javascript" src="test_case.js"></script>
<script>
    window.onload = async () => {
        runTestCase(document.getElementById("log"));
    };
</script>
<p>Running Foo auto test.</p>
<div id="log"></div>

Implementing a GUI test case

This is similar to implementing a basic test case, with the difference that the hosting html file provides container elements which becomes QScreens for the test code.

<!doctype html>
<script type="text/javascript" src="qtwasmtestlib.js"></script>
<script type="text/javascript" src="test_case.js"></script>
<script>
    window.onload = async () => {
        let log = document.getElementById("log")
        let containers = [document.getElementById("container")];
        runTestCase(log, containers);
    };
</script>
<p>Running Foo auto test.</p>
<div id="container"></div>
<div id="log"></div>