Add doesNot[Start/End]WithWhitespace methods to CharSequence assertions

[yyytir777]

Check List:

• Fixes Add AbstractCharSequenceAssert#doesNotHaveAny(Leading|Trailing)Whitespaces #3433
• Unit tests : YES
• Javadoc with a code example (on API only) : YES
• PR meets the contributing guidelines

[onacit]

Can't we use CharSequence#codePoints()?

Character.isWhiteapce(actual.codePoints().findFirst().getAsInt());
Character.isWhiteapce(actual.codePoints().reduce((v1, v2) -> v2).getAsInt());

[yyytir777]

Thanks for better method. I'll fix it right now.

[joel-costigliola]

@onacit why would using code points be better than char to detect whitespaces ?
do you have an example where using code points would detect whitespaces that char don't ?

[onacit]

@joel-costigliola As documented in Character.isWhitespace(char), it'll, I think, be better when we use codePoints.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isWhitespace(int) method.

Thanks.

[scordio]

Can't we use CharSequence#codePoints()?

Character.isWhiteapce(actual.codePoints().findFirst().getAsInt());
Character.isWhiteapce(actual.codePoints().reduce((v1, v2) -> v2).getAsInt());

Best would be to compose a test that demonstrates the need for codePoints, for example using Unicode whitespace that wouldn't be detected by Character.isWhitespace(char) but would otherwise work with Character.isWhitespace(int).

The test would also prevent regressions if we changed the implementation to Character.isWhitespace(char).

Taking inspiration from https://stackoverflow.com/a/18169122/9714611, maybe a value from this list could help?

[joel-costigliola]

I'm on it @scordio ! @yyytir777 you'll get full credit for the PR don't worry :)

[joel-costigliola]

Integrated thanks @yyytir777 !