test: test resolveObject with an empty path

[watilde]

Add a case to test an URL object that has no path at all for url.resolveObject.

This test increases the coverage of lib/url.js:

• https://coverage.nodejs.org/coverage-055482c21e2df944/root/url.js.html

The following lines will be checked:

• node/lib/url.js

  Lines 846 to 849 in 055482c

  	if(!srcPath.length){
  	// no path at all. easy.
  	// we've already handled the other stuff above.
  	result.pathname=null;

• node/lib/url.js

  Lines 853 to 858 in 055482c

  	}else{
  	result.path=null;
  	}
  	result.href=result.format();
  	returnresult;
  	}

This PR was part of #11395 that I created, and I separated a non-breaking change commit from #11395 to this PR. I will update #11395 later.

Checklist

• make -j4 test
• tests is included
• commit message follows commit guidelines

Affected core subsystem(s)

test

[watilde]

CI: https://ci.nodejs.org/job/node-test-pull-request/6806/

[watilde]

Updated the name of a subsystem to test from url in a commit message and this issue title.

[watilde]

new CI https://ci.nodejs.org/job/node-test-pull-request/6807/

[watilde]

Same with this: #11812 (comment). I will rerun the CI.

[watilde]

new new CI: https://ci.nodejs.org/job/node-test-pull-request/6827/

[watilde]

Landed in 92bcc13