Java 16 incompatibility due to usage of internal APIs

The README promises that “Playwright requires Java 8 or newer”. This does not include Java 16, however. With JEP 396, further APIs were encapsulated that are being used by Playwright. As a result, running the test suite with Java 16 fails. Examples:

[ERROR] com.microsoft.playwright.TestScreencast.shouldExposeVideoPath(Path)  Time elapsed: 0.096 s  <<< ERROR!
java.lang.reflect.InaccessibleObjectException: Unable to make field private final sun.nio.fs.UnixFileSystem sun.nio.fs.UnixPath.fs accessible: module java.base does not "opens sun.nio.fs" to unnamed module @152f2773
	at com.microsoft.playwright.TestScreencast.shouldExposeVideoPath(TestScreencast.java:30)

...


[ERROR] com.microsoft.playwright.TestBrowserContextAddCookies.shouldRoundtripCookie  Time elapsed: 0.103 s  <<< ERROR!
java.lang.reflect.InaccessibleObjectException: Unable to make private java.util.Collections$EmptyList() accessible: module java.base does not "opens java.util" to unnamed module @152f2773
	at com.microsoft.playwright.TestBrowserContextAddCookies.shouldRoundtripCookie(TestBrowserContextAddCookies.java:53)

Steps to reproduce:

1. Install any version of OpenJDK 16 (I’m using Liberica by Bell Soft)
2. Run mvn test

I know about workarounds like --add-opens. But it would be great if Playwright worked without them. Because the OpenJDK team plans to enable further restrictions in the future, it might make sense to test against the newest JDK as part of each CI run.

[aahlenst]

Works great, thanks!

[yury-s]

@aahlenst The fix is now available in 1.11.0-SNAPSHOT, can you give it a try?