ECMAScript accessKey tests

Set valid access keys and read them back

This does not automatically test that the assigned access keys actually work.

		empty string
	U+0020	must not become "Space"
	U+0025	ASCII punctuation
	U+007A	ASCII letter
	U+00E5	Latin-1
	U+0161	Latin-9
	U+3042	Hiragana
	U+10A55	Kharoshthi

These might throw errors

		number -273.15
		U+0000
		U+0001
		U+000A
		"hyi"

Invalid uses of surrogates

		U+D800
		U+D800 U+002E
		U+D800 U+D800
		U+D800 U+DBFF
		U+D800 U+E000
		U+DBFF U+DBFF
		U+DC00
		U+DC00 U+002E
		U+DC00 U+D800
		U+DC00 U+DBFF
		U+DC00 U+DC00
		U+DC00 U+DFFF
		U+DC00 U+FF20
		U+DFFF
		U+DFFF U+DFFF