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-rw-r--r--js/src/tests/ecma_6/Array/from-iterator-close.js183
1 files changed, 183 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Array/from-iterator-close.js b/js/src/tests/ecma_6/Array/from-iterator-close.js
new file mode 100644
index 000000000..fa97ea282
--- /dev/null
+++ b/js/src/tests/ecma_6/Array/from-iterator-close.js
@@ -0,0 +1,183 @@
+var BUGNUMBER = 1180306;
+var summary = 'Array.from should close iterator on error';
+
+print(BUGNUMBER + ": " + summary);
+
+function test(ctor, { mapVal=undefined,
+ nextVal=undefined,
+ nextThrowVal=undefined,
+ modifier=undefined,
+ exceptionVal=undefined,
+ exceptionType=undefined,
+ closed=true }) {
+ let iterable = {
+ closed: false,
+ [Symbol.iterator]() {
+ let iterator = {
+ first: true,
+ next() {
+ if (this.first) {
+ this.first = false;
+ if (nextThrowVal)
+ throw nextThrowVal;
+ return nextVal;
+ }
+ return { value: undefined, done: true };
+ },
+ return() {
+ iterable.closed = true;
+ return {};
+ }
+ };
+ if (modifier)
+ modifier(iterator, iterable);
+
+ return iterator;
+ }
+ };
+ if (exceptionVal) {
+ let caught = false;
+ try {
+ ctor.from(iterable, mapVal);
+ } catch (e) {
+ assertEq(e, exceptionVal);
+ caught = true;
+ }
+ assertEq(caught, true);
+ } else if (exceptionType) {
+ assertThrowsInstanceOf(() => ctor.from(iterable, mapVal), exceptionType);
+ } else {
+ ctor.from(iterable, mapVal);
+ }
+ assertEq(iterable.closed, closed);
+}
+
+// == Error cases with close ==
+
+// ES 2017 draft 22.1.2.1 step 5.e.i.1.
+// Cannot test.
+
+// ES 2017 draft 22.1.2.1 step 5.e.vi.2.
+test(Array, {
+ mapVal: () => { throw "map throws"; },
+ nextVal: { value: 1, done: false },
+ exceptionVal: "map throws",
+ closed: true,
+});
+
+// ES 2017 draft 22.1.2.1 step 5.e.ix.
+class MyArray extends Array {
+ constructor() {
+ return new Proxy({}, {
+ defineProperty() {
+ throw "defineProperty throws";
+ }
+ });
+ }
+}
+test(MyArray, {
+ nextVal: { value: 1, done: false },
+ exceptionVal: "defineProperty throws",
+ closed: true,
+});
+
+// ES 2017 draft 7.4.6 step 3.
+// if GetMethod fails, the thrown value should be used.
+test(MyArray, {
+ nextVal: { value: 1, done: false },
+ modifier: (iterator, iterable) => {
+ Object.defineProperty(iterator, "return", {
+ get: function() {
+ iterable.closed = true;
+ throw "return getter throws";
+ }
+ });
+ },
+ exceptionVal: "return getter throws",
+ closed: true,
+});
+test(MyArray, {
+ nextVal: { value: 1, done: false },
+ modifier: (iterator, iterable) => {
+ Object.defineProperty(iterator, "return", {
+ get: function() {
+ iterable.closed = true;
+ return "non object";
+ }
+ });
+ },
+ exceptionType: TypeError,
+ closed: true,
+});
+test(MyArray, {
+ nextVal: { value: 1, done: false },
+ modifier: (iterator, iterable) => {
+ Object.defineProperty(iterator, "return", {
+ get: function() {
+ iterable.closed = true;
+ // Non callable.
+ return {};
+ }
+ });
+ },
+ exceptionType: TypeError,
+ closed: true,
+});
+
+// ES 2017 draft 7.4.6 steps 6.
+// if return method throws, the thrown value should be ignored.
+test(MyArray, {
+ nextVal: { value: 1, done: false },
+ modifier: (iterator, iterable) => {
+ iterator.return = function() {
+ iterable.closed = true;
+ throw "return throws";
+ };
+ },
+ exceptionVal: "defineProperty throws",
+ closed: true,
+});
+
+test(MyArray, {
+ nextVal: { value: 1, done: false },
+ modifier: (iterator, iterable) => {
+ iterator.return = function() {
+ iterable.closed = true;
+ return "non object";
+ };
+ },
+ exceptionVal: "defineProperty throws",
+ closed: true,
+});
+
+// == Error cases without close ==
+
+// ES 2017 draft 22.1.2.1 step 5.e.iii.
+test(Array, {
+ nextThrowVal: "next throws",
+ exceptionVal: "next throws",
+ closed: false,
+});
+
+test(Array, {
+ nextVal: { value: {}, get done() { throw "done getter throws"; } },
+ exceptionVal: "done getter throws",
+ closed: false,
+});
+
+// ES 2017 draft 22.1.2.1 step 5.e.v.
+test(Array, {
+ nextVal: { get value() { throw "value getter throws"; }, done: false },
+ exceptionVal: "value getter throws",
+ closed: false,
+});
+
+// == Successful cases ==
+
+test(Array, {
+ nextVal: { value: 1, done: false },
+ closed: false,
+});
+
+if (typeof reportCompare === 'function')
+ reportCompare(true, true);