fix(event): assign pointer coords to MouseEvent

[ph-fritsche]

What:

Assign missing pointer coords.

Why:

Closes #1037

Checklist:

• Tests
• Ready to be merged

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Latest deployment of this branch, based on commit d5a2f34:

Sandbox	Source
userEvent-dom	Configuration
userEvent-react	Configuration
smoosh-firefly-o0d0y6	Issue #1037

[codecov]

Codecov Report

Merging #1039 (d5a2f34) into main (1aa2027) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main     #1039   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           88        88           
  Lines         2061      2061           
  Branches       691       701   +10     
=========================================
  Hits          2061      2061           

Impacted Files	Coverage Δ
src/event/createEvent.ts	100.00% <ø> (ø)

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[liamcmitchell-sc]

Note this fix may break with future JSDOM versions:

jestjs/jest#13825 (comment)

[ph-fritsche]

@liamcmitchell-sc The properties are assigned as a getter per Object.defineProperty.

user-event/src/event/createEvent.ts

Lines 79 to 83 in 7a305de

	function assignProps<T extends object>(obj: T, props: {[k in keyof T]?: T[k]}) {
	for (const [key, value] of Object.entries(props)) {
	Object.defineProperty(obj, key, {get: () => value ?? null})
	}
	}

[liamcmitchell-sc]

@ph-fritsche ah thanks, didn't get that deep.