Quickly Testing Qt Desktop Applications with Approval Tests
summary
You get a concrete recipe: split the app into a static ui library split so tests link the UI code without changing source, use Catch2 with a custom main that creates QApplication, and apply ApprovalTests.cpp integration to capture table cell text or whole-widget images as golden files. Examples use Qt5 widgets, QTest event helpers and QSignalSpy usage to assert a single emitted signal (value 17) for a GoToLine widget. Fixtures hide fragile findChild access; screenshots are supported but flagged as brittle.
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chapters (16)
- 0:00Introduction
- 0:46Speaker background
- 2:25The legacy code challenge
- 3:41Refactoring for testing
- 6:52Automated testing overview
- 8:14Setting up the test runner
- 10:29Testing with color widgets
- 15:39Simulating user interaction
- 22:52Improving test maintainability
- 28:15Separating logic from UI
- 30:15Testing Qt signals and events
- 36:46Introduction to approval tests
- 44:05Visualizing test results
- 46:13Qt testing tools
- 49:09Summary and conclusion
- 50:24Q&A and closing
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