Add support for >>>=

[arpit-saxena]

This Pull Request fixes #621

It changes the following:

• Adds support for unsigned right shift assignment operator (>>>=)
• Adds a test for the operator

[arpit-saxena]

boa/boa/src/exec/tests.rs

Lines 1302 to 1316 in 3f6a8ef

	#[test]
	#[ignore]
	fn multicharacter_bitwise_assignment_to_non_assignable() {
	let mut engine = Context::new();
	// Disabled - awaiting implementation.
	let test_cases = ["3 >>>= 5", "3 &&= 5", "3 ||= 5", "3 ??= 5"];
	for case in test_cases.iter() {
	let string = dbg!(forward(&mut engine, case));
	assert!(string.starts_with("Uncaught \"SyntaxError\": "));
	assert!(string.contains("1:3"));
	}
	}

This test was ignored due to >>>= being unimplemented. It looks like it is outdated though given the error messages are a bit different than what it looks for. The error messages all begin with Uncaught "TypeError": , should I add this to the test?

[HalidOdat]

This test was ignored due to >>>= being unimplemented. It looks like it is outdated though given the error messages are a bit different than what it looks for. The error messages all begin with Uncaught "TypeError": , should I add this to the test?

This test is for invalid assign operations like 2 += 2 this should generate a syntax error but since we don't have all the operators implemented we ignore it for now. we should have a test for >>>= execution like:

let x = -1000;
x >>>= 1;

and asserting that x equals 2147483148 or something like this.

[arpit-saxena]

we should have a test for >>>= execution like:

let x = -1000;
x >>>= 1;

and asserting that x equals 2147483148 or something like this.

I can add that but if I do that, I think there should tests similar to this for other operators too, like >>=, and I can't find any of them currently. Is there a need to add tests for all the operators?

[HalidOdat]

I can add that but if I do that, I think there should tests similar to this for other operators too, like >>=, and I can't find any of them currently. Is there a need to add tests for all the operators?

There should be some tests for some operators in value/tests.rs and in exec/tests.rs.

Is there a need to add tests for all the operators?

More tests is always nice to have.