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-rw-r--r--deps/v8/test/mjsunit/harmony/generators.js587
1 files changed, 488 insertions, 99 deletions
diff --git a/deps/v8/test/mjsunit/harmony/generators.js b/deps/v8/test/mjsunit/harmony/generators.js
index df6cec8925..a4fc1c4aa4 100644
--- a/deps/v8/test/mjsunit/harmony/generators.js
+++ b/deps/v8/test/mjsunit/harmony/generators.js
@@ -2,6 +2,33 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
+// Flags: --harmony-do-expressions --allow-natives-syntax
+
+
+function MaybeOptimizeOrDeoptimize(f) {
+ let x = Math.random(); // --random-seed makes this deterministic
+ if (x <= 0.33) {
+ %OptimizeFunctionOnNextCall(f);
+ } else if (x <= 0.66) {
+ %DeoptimizeFunction(f);
+ }
+}
+
+function Next(generator, ...args) {
+ MaybeOptimizeOrDeoptimize(%GeneratorGetFunction(generator));
+ return generator.next(...args);
+}
+
+function Return(generator, ...args) {
+ MaybeOptimizeOrDeoptimize(%GeneratorGetFunction(generator));
+ return generator.return(...args);
+}
+
+function Throw(generator, ...args) {
+ MaybeOptimizeOrDeoptimize(%GeneratorGetFunction(generator));
+ return generator.throw(...args);
+}
+
{ // yield in try-catch
@@ -9,19 +36,19 @@
try {yield 1} catch (error) {assertEquals("caught", error)}
};
- assertThrowsEquals(() => g().throw("not caught"), "not caught");
+ assertThrowsEquals(() => Throw(g(), "not caught"), "not caught");
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: undefined, done: true}, x.throw("caught"));
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: undefined, done: true}, Throw(x, "caught"));
}
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: undefined, done: true}, x.next());
- assertThrowsEquals(() => x.throw("not caught"), "not caught");
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: undefined, done: true}, Next(x));
+ assertThrowsEquals(() => Throw(x, "not caught"), "not caught");
}
}
@@ -31,19 +58,19 @@
{
let x = g();
- assertEquals({value: 43, done: false}, x.next());
- assertEquals({value: 42, done: true}, x.next());
+ assertEquals({value: 43, done: false}, Next(x));
+ assertEquals({value: 42, done: true}, Next(x));
}
}
{ // return that doesn't close
let x;
- let g = function*() { try {return 42} finally {x.throw(666)} };
+ let g = function*() { try {return 42} finally {Throw(x, 666)} };
{
x = g();
- assertThrows(() => x.next(), TypeError); // still executing
+ assertThrows(() => Next(x), TypeError); // still executing
}
}
@@ -54,42 +81,42 @@
{ // "return" closes at suspendedStart
let x = g();
- assertEquals({value: 666, done: true}, x.return(666));
- assertEquals({value: undefined, done: true}, x.next(42));
- assertThrowsEquals(() => x.throw(43), 43);
- assertEquals({value: 42, done: true}, x.return(42));
+ assertEquals({value: 666, done: true}, Return(x, 666));
+ assertEquals({value: undefined, done: true}, Next(x, 42));
+ assertThrowsEquals(() => Throw(x, 43), 43);
+ assertEquals({value: 42, done: true}, Return(x, 42));
}
{ // "throw" closes at suspendedStart
let x = g();
- assertThrowsEquals(() => x.throw(666), 666);
- assertEquals({value: undefined, done: true}, x.next(42));
- assertEquals({value: 43, done: true}, x.return(43));
- assertThrowsEquals(() => x.throw(44), 44);
+ assertThrowsEquals(() => Throw(x, 666), 666);
+ assertEquals({value: undefined, done: true}, Next(x, 42));
+ assertEquals({value: 43, done: true}, Return(x, 43));
+ assertThrowsEquals(() => Throw(x, 44), 44);
}
{ // "next" closes at suspendedYield
let x = g();
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 13, done: true}, x.next(666));
- assertEquals({value: undefined, done: true}, x.next(666));
- assertThrowsEquals(() => x.throw(666), 666);
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 13, done: true}, Next(x, 666));
+ assertEquals({value: undefined, done: true}, Next(x, 666));
+ assertThrowsEquals(() => Throw(x, 666), 666);
}
{ // "return" closes at suspendedYield
let x = g();
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 13, done: true}, x.return(666));
- assertEquals({value: undefined, done: true}, x.next(666));
- assertEquals({value: 666, done: true}, x.return(666));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 13, done: true}, Return(x, 666));
+ assertEquals({value: undefined, done: true}, Next(x, 666));
+ assertEquals({value: 666, done: true}, Return(x, 666));
}
{ // "throw" closes at suspendedYield
let x = g();
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 13, done: true}, x.throw(666));
- assertThrowsEquals(() => x.throw(666), 666);
- assertEquals({value: undefined, done: true}, x.next(666));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 13, done: true}, Throw(x, 666));
+ assertThrowsEquals(() => Throw(x, 666), 666);
+ assertEquals({value: undefined, done: true}, Next(x, 666));
}
}
@@ -100,45 +127,45 @@
{ // "return" closes at suspendedStart
let x = g();
- assertEquals({value: 666, done: true}, x.return(666));
- assertEquals({value: undefined, done: true}, x.next(42));
- assertThrowsEquals(() => x.throw(43), 43);
- assertEquals({value: 42, done: true}, x.return(42));
+ assertEquals({value: 666, done: true}, Return(x, 666));
+ assertEquals({value: undefined, done: true}, Next(x, 42));
+ assertThrowsEquals(() => Throw(x, 43), 43);
+ assertEquals({value: 42, done: true}, Return(x, 42));
}
{ // "throw" closes at suspendedStart
let x = g();
- assertThrowsEquals(() => x.throw(666), 666);
- assertEquals({value: undefined, done: true}, x.next(42));
- assertEquals({value: 43, done: true}, x.return(43));
- assertThrowsEquals(() => x.throw(44), 44);
+ assertThrowsEquals(() => Throw(x, 666), 666);
+ assertEquals({value: undefined, done: true}, Next(x, 42));
+ assertEquals({value: 43, done: true}, Return(x, 43));
+ assertThrowsEquals(() => Throw(x, 44), 44);
}
{ // "next" closes at suspendedYield
let x = g();
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: undefined, done: true}, x.next(666));
- assertEquals({value: undefined, done: true}, x.next(666));
- assertThrowsEquals(() => x.throw(666), 666);
- assertEquals({value: 42, done: true}, x.return(42));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: undefined, done: true}, Next(x, 666));
+ assertEquals({value: undefined, done: true}, Next(x, 666));
+ assertThrowsEquals(() => Throw(x, 666), 666);
+ assertEquals({value: 42, done: true}, Return(x, 42));
}
{ // "return" closes at suspendedYield
let x = g();
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 666, done: true}, x.return(666));
- assertEquals({value: undefined, done: true}, x.next(666));
- assertThrowsEquals(() => x.throw(44), 44);
- assertEquals({value: 42, done: true}, x.return(42));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 666, done: true}, Return(x, 666));
+ assertEquals({value: undefined, done: true}, Next(x, 666));
+ assertThrowsEquals(() => Throw(x, 44), 44);
+ assertEquals({value: 42, done: true}, Return(x, 42));
}
{ // "throw" closes at suspendedYield
let x = g();
- assertEquals({value: 42, done: false}, x.next());
- assertThrowsEquals(() => x.throw(666), 666);
- assertEquals({value: undefined, done: true}, x.next(666));
- assertThrowsEquals(() => x.throw(666), 666);
- assertEquals({value: 42, done: true}, x.return(42));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertThrowsEquals(() => Throw(x, 666), 666);
+ assertEquals({value: undefined, done: true}, Next(x, 666));
+ assertThrowsEquals(() => Throw(x, 666), 666);
+ assertEquals({value: 42, done: true}, Return(x, 42));
}
}
@@ -149,17 +176,17 @@
{
let x = g();
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 43, done: false}, x.return(666));
- assertEquals({value: 13, done: true}, x.next());
- assertEquals({value: 666, done: true}, x.return(666));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 43, done: false}, Return(x, 666));
+ assertEquals({value: 13, done: true}, Next(x));
+ assertEquals({value: 666, done: true}, Return(x, 666));
}
{
let x = g();
- assertEquals({value: 666, done: true}, x.return(666));
- assertEquals({value: undefined, done: true}, x.next());
- assertEquals({value: 666, done: true}, x.return(666));
+ assertEquals({value: 666, done: true}, Return(x, 666));
+ assertEquals({value: undefined, done: true}, Next(x));
+ assertEquals({value: 666, done: true}, Return(x, 666));
}
}
@@ -170,17 +197,17 @@
{
let x = g();
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 43, done: false}, x.return(666));
- assertEquals({value: 666, done: true}, x.next());
- assertEquals({value: 5, done: true}, x.return(5));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 43, done: false}, Return(x, 666));
+ assertEquals({value: 666, done: true}, Next(x));
+ assertEquals({value: 5, done: true}, Return(x, 5));
}
{
let x = g();
- assertEquals({value: 666, done: true}, x.return(666));
- assertEquals({value: undefined, done: true}, x.next());
- assertEquals({value: 666, done: true}, x.return(666));
+ assertEquals({value: 666, done: true}, Return(x, 666));
+ assertEquals({value: undefined, done: true}, Next(x));
+ assertEquals({value: 666, done: true}, Return(x, 666));
}
}
@@ -192,29 +219,29 @@
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 43, done: false}, x.next(666));
- assertEquals({value: 13, done: false}, x.next());
- assertEquals({value: undefined, done: true}, x.next());
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 43, done: false}, Next(x, 666));
+ assertEquals({value: 13, done: false}, Next(x));
+ assertEquals({value: undefined, done: true}, Next(x));
}
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 43, done: false}, x.return(666));
- assertEquals({value: 13, done: false}, x.next());
- assertEquals({value: undefined, done: true}, x.next());
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 43, done: false}, Return(x, 666));
+ assertEquals({value: 13, done: false}, Next(x));
+ assertEquals({value: undefined, done: true}, Next(x));
}
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 43, done: false}, x.throw(666));
- assertEquals({value: 13, done: false}, x.next());
- assertEquals({value: undefined, done: true}, x.next());
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 43, done: false}, Throw(x, 666));
+ assertEquals({value: 13, done: false}, Next(x));
+ assertEquals({value: undefined, done: true}, Next(x));
}
}
@@ -226,28 +253,28 @@
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 43, done: false}, x.next(666));
- assertEquals({value: undefined, done: false}, x.next());
- assertEquals({value: undefined, done: true}, x.next());
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 43, done: false}, Next(x, 666));
+ assertEquals({value: undefined, done: false}, Next(x));
+ assertEquals({value: undefined, done: true}, Next(x));
}
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 43, done: false}, x.return(44));
- assertEquals({value: 44, done: false}, x.next());
- assertEquals({value: undefined, done: true}, x.next());
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 43, done: false}, Return(x, 44));
+ assertEquals({value: 44, done: false}, Next(x));
+ assertEquals({value: undefined, done: true}, Next(x));
}
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: 42, done: false}, x.next());
- assertEquals({value: 43, done: false}, x.throw(666));
- assertThrowsEquals(() => x.next(), 666);
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: 42, done: false}, Next(x));
+ assertEquals({value: 43, done: false}, Throw(x, 666));
+ assertThrowsEquals(() => Next(x), 666);
}
}
@@ -265,8 +292,370 @@
{
let x = g();
- assertEquals({value: 1, done: false}, x.next());
- assertEquals({value: 2, done: false}, x.next());
- assertEquals({value: 42, done: true}, x.return(42));
+ assertEquals({value: 1, done: false}, Next(x));
+ assertEquals({value: 2, done: false}, Next(x));
+ assertEquals({value: 42, done: true}, Return(x, 42));
+ }
+}
+
+
+// More or less random tests from here on.
+
+
+{
+ function* foo() { }
+ let g = foo();
+ assertEquals({value: undefined, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo() { return new.target }
+ let g = foo();
+ assertEquals({value: undefined, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo() { throw 666; return 42}
+ let g = foo();
+ assertThrowsEquals(() => Next(g), 666);
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo(a) { return a; }
+ let g = foo(42);
+ assertEquals({value: 42, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo(a) { a.iwashere = true; return a; }
+ let x = {};
+ let g = foo(x);
+ assertEquals({value: {iwashere: true}, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ let a = 42;
+ function* foo() { return a; }
+ let g = foo();
+ assertEquals({value: 42, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ let a = 40;
+ function* foo(b) { return a + b; }
+ let g = foo(2);
+ assertEquals({value: 42, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ let a = 40;
+ function* foo(b) { a--; b++; return a + b; }
+ let g = foo(2);
+ assertEquals({value: 42, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ let g;
+ function* foo() { Next(g) }
+ g = foo();
+ assertThrows(() => Next(g), TypeError);
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo() { yield 2; yield 3; yield 4 }
+ g = foo();
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 4, done: false}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+
+{
+ function* foo() { yield 2; if (true) { yield 3 }; yield 4 }
+ g = foo();
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 4, done: false}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo() { yield 2; if (true) { yield 3; yield 4 } }
+ g = foo();
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 4, done: false}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo() { yield 2; if (false) { yield 3 }; yield 4 }
+ g = foo();
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 4, done: false}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo() { yield 2; while (true) { yield 3 }; yield 4 }
+ g = foo();
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+}
+
+{
+ function* foo() { yield 2; (yield 3) + 42; yield 4 }
+ g = foo();
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 4, done: false}, Next(g));
+}
+
+{
+ function* foo() { yield 2; (do {yield 3}) + 42; yield 4 }
+ g = foo();
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 4, done: false}, Next(g));
+}
+
+{
+ function* foo() { yield 2; return (yield 3) + 42; yield 4 }
+ g = foo();
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 42, done: true}, Next(g, 0));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ let x = 42;
+ function* foo() {
+ yield x;
+ for (let x in {a: 1, b: 2}) {
+ let i = 2;
+ yield x;
+ yield i;
+ do {
+ yield i;
+ } while (i-- > 0);
+ }
+ yield x;
+ return 5;
+ }
+ g = foo();
+ assertEquals({value: 42, done: false}, Next(g));
+ assertEquals({value: 'a', done: false}, Next(g));
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 1, done: false}, Next(g));
+ assertEquals({value: 0, done: false}, Next(g));
+ assertEquals({value: 'b', done: false}, Next(g));
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 1, done: false}, Next(g));
+ assertEquals({value: 0, done: false}, Next(g));
+ assertEquals({value: 42, done: false}, Next(g));
+ assertEquals({value: 5, done: true}, Next(g));
+}
+
+{
+ let a = 3;
+ function* foo() {
+ let b = 4;
+ yield 1;
+ { let c = 5; yield 2; yield a; yield b; yield c; }
+ }
+ g = foo();
+ assertEquals({value: 1, done: false}, Next(g));
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 3, done: false}, Next(g));
+ assertEquals({value: 4, done: false}, Next(g));
+ assertEquals({value: 5, done: false}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo() {
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ yield 42;
+ }
+ g = foo();
+ for (let i = 0; i < 100; ++i) {
+ assertEquals({value: 42, done: false}, i%25 === 0 ? Next(g) : g.next());
+ }
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ function* foo() {
+ for (let i = 0; i < 3; ++i) {
+ let j = 0
+ yield i;
+ do {
+ yield (i + 10);
+ } while (++j < 2);
+ }
}
+ g = foo();
+ assertEquals({value: 0, done: false}, Next(g));
+ assertEquals({value: 10, done: false}, Next(g));
+ assertEquals({value: 10, done: false}, Next(g));
+ assertEquals({value: 1, done: false}, Next(g));
+ assertEquals({value: 11, done: false}, Next(g));
+ assertEquals({value: 11, done: false}, Next(g));
+ assertEquals({value: 2, done: false}, Next(g));
+ assertEquals({value: 12, done: false}, Next(g));
+ assertEquals({value: 12, done: false}, Next(g));
+ assertEquals({value: undefined, done: true}, Next(g));
+}
+
+{
+ let foo = function*() {
+ while (true) {
+ if (true || false) yield 42;
+ continue;
+ }
+ }
+ g = foo();
+ assertEquals({value: 42, done: false}, Next(g));
+ assertEquals({value: 42, done: false}, Next(g));
+ assertEquals({value: 42, done: false}, Next(g));
+}
+
+{
+ let foo = function*() {
+ yield* (function*() { yield 42; }());
+ assertUnreachable();
+ }
+ g = foo();
+ assertEquals({value: 42, done: false}, Next(g));
+ assertEquals({value: 23, done: true}, Return(g, 23));
+}
+
+{
+ let iterable = {
+ [Symbol.iterator]() {
+ return { next() { return {} } };
+ }
+ };
+ let foo = function*() { yield* iterable };
+ g = foo();
+ g.next();
+ assertThrows(() => Throw(g), TypeError);
}
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