michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: function check_one(expected, f, err) {
michael@0:     var failed = true;
michael@0:     try {
michael@0:         f();
michael@0:         failed = false;
michael@0:     } catch (ex) {
michael@0:         var s = ex.toString();
michael@0:         assertEq(s.slice(0, 11), "TypeError: ");
michael@0:         assertEq(s.slice(-err.length), err, "" + f);
michael@0:         assertEq(s.slice(11, -err.length), expected);
michael@0:     }
michael@0:     if (!failed)
michael@0:         throw new Error("didn't fail");
michael@0: }
michael@0: ieval = eval;
michael@0: function check(expr, expected=expr) {
michael@0:     var end, err;
michael@0:     for ([end, err] of [[".random_prop", " is undefined"], ["()", " is not a function"]]) {
michael@0:         var statement = "o = {};" + expr + end, f;
michael@0:         var cases = [
michael@0:             // Global scope
michael@0:             function () {
michael@0:                 ieval("var o, undef;\n" + statement);
michael@0:             },
michael@0:             // Function scope
michael@0:             Function("o", "undef", statement),
michael@0:             // Function scope with variables
michael@0:             Function("var o, undef;\n" + statement),
michael@0:             // Function scope with some different arugments
michael@0:             Function("arg1", "arg2", "var o, undef;\n" + statement),
michael@0:             // Deoptimized function scope
michael@0:             Function("o", "undef", "with (Object) {}\n" + statement),
michael@0:             // Inside with
michael@0:             Function("with (Object) { " + statement + " }"),
michael@0:             // Closure
michael@0:             Function("o", "undef", "function myfunc() { return o + undef; }\n" + statement),
michael@0:             // Let definitions in a block
michael@0:             Function("{ let o, undef;\n" + statement + "}"),
michael@0:             // Let block
michael@0:             Function("let (o, undef) { " + statement + " }"),
michael@0:             // Let block with some other variables
michael@0:             Function("var v1, v2; let (o, undef) { " + statement + " }"),
michael@0:             // Shadowed let block
michael@0:             Function("o", "undef", "let (o, undef) { " + statement + " }"),
michael@0:             // Let in a switch
michael@0:             Function("var x = 4; switch (x) { case 4: let o, undef;" + statement + "\ncase 6: break;}"),
michael@0:             // The more lets the merrier
michael@0:             Function("let (x=4, y=5) { x + y; }\nlet (a, b, c) { a + b - c; }\nlet (o, undef) {" + statement + " }"),
michael@0:             // Let destructuring
michael@0:             Function("o", "undef", "let ([] = 4) {} let (o, undef) { " + statement + " }"),
michael@0:             // Try-catch blocks
michael@0:             Function("o", "undef", "try { let q = 4; try { let p = 4; } catch (e) {} } catch (e) {} let (o, undef) { " + statement + " }")
michael@0:         ];
michael@0: 
michael@0:         try {
michael@0:             // Let in for-in
michael@0:             check_one(expected,
michael@0:                       Function("var undef, o; for (let z in [1, 2]) { " + statement + " }"),
michael@0:                       err);
michael@0:         } catch (ex) {
michael@0:             // Bug 831120.  See bug 942804 comment 5.
michael@0:             if (expected == 'undef' && err == ' is undefined')
michael@0:                 check_one(expected + end,
michael@0:                           Function("var undef, o; for (let z in [1, 2]) { " + statement + " }"),
michael@0:                           err);
michael@0:             else
michael@0:                 throw ex;
michael@0:         }
michael@0: 
michael@0:         for (var f of cases) {
michael@0:             check_one(expected, f, err);
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: check("undef");
michael@0: check("o.b");
michael@0: check("o.length");
michael@0: check("o[true]");
michael@0: check("o[false]");
michael@0: check("o[null]");
michael@0: check("o[0]");
michael@0: check("o[1]");
michael@0: check("o[3]");
michael@0: check("o[256]");
michael@0: check("o[65536]");
michael@0: check("o[268435455]");
michael@0: check("o['1.1']");
michael@0: check("o[4 + 'h']", "o['4h']");
michael@0: check("this.x");
michael@0: check("ieval(undef)", "ieval(...)");
michael@0: check("ieval.call()", "ieval.call(...)");
michael@0: check("ieval(...[])", "ieval(...)");
michael@0: check("ieval(...[undef])", "ieval(...)");
michael@0: check("ieval(...[undef, undef])", "ieval(...)");
michael@0: 
michael@0: for (let tok of ["|", "^", "&", "==", "!==", "===", "!==", "<", "<=", ">", ">=",
michael@0:                  ">>", "<<", ">>>", "+", "-", "*", "/", "%"]) {
michael@0:     check("o[(undef " + tok + " 4)]");
michael@0: }
michael@0: 
michael@0: check("o[!(o)]");
michael@0: check("o[~(o)]");
michael@0: check("o[+ (o)]");
michael@0: check("o[- (o)]");
michael@0: 
michael@0: // A few one off tests
michael@0: check_one("6", (function () { 6() }), " is not a function");
michael@0: check_one("Array.prototype.reverse.call(...)", (function () { Array.prototype.reverse.call('123'); }), " is read-only");
michael@0: check_one("null", function () { var [{ x }] = [null, {}]; }, " has no properties");
michael@0: check_one("x", function () { ieval("let (x) { var [a, b, [c0, c1]] = [x, x, x]; }") }, " is undefined");
michael@0: 
michael@0: // Check fallback behavior
michael@0: assertThrowsInstanceOf(function () { for (let x of undefined) {} }, TypeError);