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testland/qt-test-framework

Use whenever Qt C++ code needs unit or GUI tests in-process: Qt Test entry macros, private-slot test functions, QVERIFY, QCOMPARE and data-driven QFETCH, simulated mouse, key and touch events, QSignalSpy, QBENCHMARK and JUnit XML output for CI, including Qt Quick and QML logic.

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qt-gui-signal-benchmark.mdreferences/

qt-test-framework - GUI events, benchmarks, and CI

Reference detail kept out of the SKILL spine. See SKILL.md for the core author -> run -> parse flow (including the runnable GUI and QSignalSpy examples).

Sources: Qt Qt Test overview, QTest namespace.

GUI event-simulation functions (qtns)

FamilyFunctions
KeyboardkeyClick, keyPress, keyRelease, keyEvent, keySequence, keyClicks
MousemouseClick, mousePress, mouseRelease, mouseMove, mouseDClick
TouchtouchEvent, createTouchDevice
WheelwheelEvent (Qt 6.8+)

QTRY_VERIFY / QTRY_COMPARE poll a predicate with a default 5-second timeout - the primitive for waiting on async signal/slot completion without ad-hoc QTest::qWait sleeps.

Benchmarks

QBENCHMARK executes a code block repeatedly to measure performance; Qt Test reports CPU time, walltime, or instructions-retired depending on the active back-end (qtover). For a single-run measurement use QBENCHMARK_ONCE (qtns).

void TestCalculator::benchmarkLargeSum() {
    Calculator c;
    QBENCHMARK {
        for (int i = 0; i < 1000; ++i) {
            c.add(i, i);
        }
    }
}

Keep benchmark slots separate from correctness slots so iteration counts do not mask regressions; gate on regression in CI.

CI integration

QT_QPA_PLATFORM=offscreen is the headless Qt platform plugin - required for GUI-touching Qt Test executables on hosted Linux runners with no X / Wayland session.

# .github/workflows/qttest.yml
jobs:
  test:
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v5
      - name: Install Qt
        uses: jurplel/install-qt-action@v4
        with: { version: '6.7.0' }
      - name: Configure
        run: cmake -B build -DCMAKE_BUILD_TYPE=Release
      - name: Build
        run: cmake --build build --parallel
      - name: Run tests (Linux with offscreen)
        if: runner.os == 'Linux'
        env:
          QT_QPA_PLATFORM: offscreen
        run: ctest --test-dir build --output-on-failure --output-junit junit.xml
      - name: Run tests (Windows/macOS)
        if: runner.os != 'Linux'
        run: ctest --test-dir build --output-on-failure --output-junit junit.xml
      - uses: actions/upload-artifact@v4
        if: always()
        with:
          name: junit-${{ matrix.os }}
          path: build/junit.xml

references

qt-gui-signal-benchmark.md

SKILL.md

tile.json