Setup unit test infrastructure for PackageToJS

[kateinoigakukun]

No description provided.

[github-actions]

Time Change: +22ms (0%)

Total Time: 9,689ms

View Unchanged

Test name	Duration	Change
Serialization/JavaScript function call through Wasm import	23ms	-1ms (4%)
Serialization/JavaScript function call through Wasm import with int	21ms	-0ms
Serialization/JavaScript function call from Swift	125ms	+1ms (1%)
Serialization/Swift Int to JavaScript with assignment	350ms	+12ms (3%)
Serialization/Swift Int to JavaScript with call	980ms	+4ms (0%)
Serialization/JavaScript Number to Swift Int	279ms	+0ms
Serialization/Swift String to JavaScript with assignment	421ms	+4ms (0%)
Serialization/Swift String to JavaScript with call	1,048ms	-3ms (0%)
Serialization/JavaScript String to Swift String	3,658ms	+15ms (0%)
Object heap/Increment and decrement RC	2,770ms	-8ms (0%)

View Baselines

Test name	Duration
Serialization/Call JavaScript function directly	3ms
Serialization/Assign JavaScript number directly	3ms
Serialization/Call with JavaScript number directly	2ms
Serialization/Write JavaScript string directly	4ms
Serialization/Call with JavaScript string directly	3ms