Sling form regression tests

[renanrbs]

Short description of what this resolves:

Adds regression test for sling form

Changes proposed in this pull request:

Uses nightwatch library and take screenshots

How to run

the first time run npm run e2e:setup
run the component with npm start sling-web-component-form
to execute the tests run npm run nightwatch

[coveralls]

Pull Request Test Coverage Report for Build 915

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 57.939%

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Totals
Change from base Build 903:	0.0%
Covered Lines:	632
Relevant Lines:	989

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💛 - Coveralls

[breakzplatform]

Running:  main

 Error while running .locateSingleElement() protocol action: no such element: Unable to locate element: {"method":"css selector","selector":"sling-input[name="name"]"}

✖ Failed [equal]: ({ message:
   'no such element: Unable to locate element: {"method":"css selector","selector":"sling-input[name="name"]"}',
 ... == 'error') - expected "error" but got: "[object Object]"
   'no such element: Unable to locate element: {"method":"css selector","selector":"sling-input[name="name"]"}',
 ... == 'error'
    at NightwatchAPI.browser.getAttribute (/mnt/c/Users/joselito.nascimento/gits/sling-web-framework/packages/sling-web-component-form/src/component/Form.regression.test.js:23:24)
    at process._tickCallback (internal/process/next_tick.js:68:7)


FAILED: 1 assertions failed (6.773s)
   Failed [equal]: ({ message:
     'no such element: Unable to locate element: {"method":"css selector","selector":"sling-input[name="name"]"}',
   ... == 'error') - expected "error" but got: "[object Object]"
    ... == 'error'
       at NightwatchAPI.browser.getAttribute (/mnt/c/Users/joselito.nascimento/gits/sling-web-framework/packages/sling-web-component-form/src/component/Form.regression.test.js:23:24)
       at process._tickCallback (internal/process/next_tick.js:68:7)
_________________________________________________

TEST FAILURE:  1 assertions failed, 0 passed. 13.425s

 ✖ sling-web-component-form/src/component/Form.regression.test
 – main (6.773s)

   Failed [equal]: ({ message:
      'no such element: Unable to locate element: {"method":"css selector","selector":"sling-input[name="name"]"}',
    ... == 'error') - expected "error" but got: "[object Object]"
      'no such element: Unable to locate element: {"method":"css selector","selector":"sling-input[name="name"]"}',
    ... == 'error'
       at NightwatchAPI.browser.getAttribute (/mnt/c/Users/joselito.nascimento/gits/sling-web-framework/packages/sling-web-component-form/src/component/Form.regression.test.js:23:24)
       at process._tickCallback (internal/process/next_tick.js:68:7)

[renanrbs]

I think this one was corrected. Can u check again @joselitojunior1 ?

[renanrbs]

Sometimes the error

 Error while running .executeScript() protocol action: unknown error: Cannot read property 'querySelectorAll'
of null

happens, it looks like the script is not opening the component page, but a empty page