JS Test Cases

[aphelionz]

In order to support a "minimum viable" js -> ambient parser, we need to support the following test cases:

• let a = "foo" - value, constant (satisfied in test case 006)
• let b = () => "foo" - function, no arguments, constant expression (satisfied in test case 002, 003, 004, 005, 007)
• let c = b() - value, variable expression (satisfied in test case 007)
• let d = (x) => x - function, 1 argument, argument expression
• let e = d("foo") - value, function variable expression, constant expression
• let f = (x) => x() - function, 1 argument, function argument expression
• let g = f(b) - value, function and value variable expressions