From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 .../tests/ecma_6/Generators/delegating-yield-6.js  | 56 ++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 js/src/tests/ecma_6/Generators/delegating-yield-6.js

(limited to 'js/src/tests/ecma_6/Generators/delegating-yield-6.js')

diff --git a/js/src/tests/ecma_6/Generators/delegating-yield-6.js b/js/src/tests/ecma_6/Generators/delegating-yield-6.js
new file mode 100644
index 000000000..8b358525c
--- /dev/null
+++ b/js/src/tests/ecma_6/Generators/delegating-yield-6.js
@@ -0,0 +1,56 @@
+// Test that each yield* loop just checks "done", and "value" is only
+// fetched once at the end.
+
+var log = "";
+
+function collect_results(iter) {
+    var ret = [];
+    var result;
+    do {
+        result = iter.next();
+        ret.push(result);
+    } while (!result.done);
+    return ret;
+}
+
+function Iter(val, count) {
+    function next() {
+        log += 'n';
+        return {
+            get done() { log += "d"; return count-- == 0; },
+            get value() { log += "v"; return val; }
+        }
+    }
+
+    function iterator() {
+        log += 'i';
+        return this;
+    }
+
+    this.next = next;
+    this[Symbol.iterator] = iterator;
+}
+
+function* delegate(iter) { return yield* iter; }
+
+var inner = new Iter(42, 5);
+var outer = delegate(inner);
+
+// Five values, and one terminal value.
+outer.next();
+outer.next();
+outer.next();
+outer.next();
+outer.next();
+outer.next();
+
+assertEq(log, "indndndndndndv");
+
+// Outer's dead, man.  Outer's dead.
+assertDeepEq(outer.next(), {value: undefined, done: true});
+
+// No more checking the iterator.
+assertEq(log, "indndndndndndv");
+
+if (typeof reportCompare == "function")
+    reportCompare(true, true);
-- 
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