LayoutTests/js/script-tests/statement-list-item-syntax-errors.js

description(
    "See spec: http://www.ecma-international.org/ecma-262/6.0/index.html#sec-statements"
);

var AllShouldThrow = "AllShouldThrow";
var NoneShouldThrow = "NoneShouldThrow";

function testSyntax(asBlock, body, throwStatus) {
    var open = asBlock ? '{' : '';
    var close = asBlock ? '}' : '';

    var commonLanguageConstructs = [
        `for (var i = 0; i < 4; i++) ${open} ${body} ${close}`,
        `for (var i in {}) ${open} ${body} ${close}`,
        `for (i in {}) ${open} ${body} ${close}`,
        `for (var i of []) ${open} ${body} ${close}`,
        `for (i of []) ${open} ${body} ${close}`,
        `while (i = 0) ${open} ${body} ${close}`,
        `do ${open} ${body} ${close} while (i = 0)`,
        `if (i = 0) ${open} ${body} ${close}`,
        `if (i = 0) ${open} ${body} ${close} else ${open} ${body} ${close}`,
        `if (i = 0) i++; else ${open} ${body} ${close}`,
        `if (i = 0) ${open} ${body} ${close} else i++;`,
        `with ({}) ${open} ${body} ${close}`,
    ];

    for (var languageFeature of commonLanguageConstructs) {
        try {
            eval(languageFeature);
            if (throwStatus === AllShouldThrow) {
                testFailed(languageFeature);
                return;
            }
            testPassed(`Did not have syntax error: '${languageFeature}'`);
        } catch (e) {
            if (throwStatus === NoneShouldThrow) {
                testFailed(languageFeature);
                return;
            }
            testPassed(`Had syntax error '${languageFeature}'`);
        }
    }
}

function runTests() {
    var bodies = [
        "class C {};",
        "class C extends (class A {}) {};",
        "const c = 40;",
        "const c = 40, d = 50;",
        "let c = 40;",
        "let c = 40, d = 50;"
    ];
    for (var body of bodies) {
        testSyntax(true, body, NoneShouldThrow);
        testSyntax(false, body, AllShouldThrow);
    }
}
runTests();