`TextLayout` should deal more gracefully with zero length strings. Currently
the exception listed below is the one that is thrown.
`new TextLayout("", f, new FontRenderContext(null, false, false));`
> Exception in thread "main" java.lang.IllegalArgumentException: Zero length
> string passed to TextLayout constructor.
> at java.lang.Throwable.<init>(Compiled Code)
> at java.lang.Exception.<init>(Compiled Code)
> at java.lang.RuntimeException.<init>(Compiled Code)
> at java.lang.IllegalArgumentException.<init>(Compiled Code)
> at java.awt.font.TextLayout.<init>(Compiled Code)
> at test.main(Compiled Code)
**REVIEWER NOTE:** Please check the empty-string `TextLayout` behavior
documented in `TextLayoutConstructorTest` carefully; a badly-behaving empty
`TextLayout` is probably worse than a `TextLayout` which doesn't allow empty
strings...
-------------
Commit messages:
- Use more general leading expectations
- Allow TextLayout to handle empty strings
Changes: https://git.openjdk.org/jdk/pull/26947/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26947&range=00
Issue: https://bugs.openjdk.org/browse/JDK-4138921
Stats: 368 lines in 4 files changed: 339 ins; 6 del; 23 mod
Patch: https://git.openjdk.org/jdk/pull/26947.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/26947/head:pull/26947
PR: https://git.openjdk.org/jdk/pull/26947
