Dear colleagues: What do you think of the following idea:
The Problem =========== Automated headful tests might fail intermittently or on specific platform(s). After the fact, it's nearly impossible to understand why this happened. Solution ======== Implement a JUnit5 TestWatcher which captures the primary screen pixels and dumps them as base64-encoded PNG images in stderr (or stdout). The logs are typically preserved, so the screenshots can be analyzed after the fact. As far as I know, there is no way to configure JUnit to apply this to each test using command line option, so each test needs to have the following annotation added: @ExtendWith(ScreenCaptureTestWatcher.class) For more details please see this ticket [0] and the draft PR [1]. Possible Issues =============== * the size of the image can be quite large, for example retina mac increases the size of the log by approximately 4MB (for each image). * a misconfiguration might cause every test to fail, resulting in very large logs References ========== [0] https://bugs.openjdk.org/browse/JDK-8328716 [1] https://github.com/openjdk/jfx/pull/1415 What do you think? Cheerio, -andy
