ladybird/Libraries/LibJS/Tests/invalid-lhs-in-assignment.js

test("assignment to function call", () => {
    expect(() => {
        function foo() {}
        foo() = "foo";
    }).toThrowWithMessage(ReferenceError, "Invalid left-hand side in assignment");
});

test("assignment to inline function call", () => {
    expect(() => {
        (function () {})() = "foo";
    }).toThrowWithMessage(ReferenceError, "Invalid left-hand side in assignment");
});