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-rw-r--r--js/src/jit-test/tests/collections/Set-iterator-remove-1.js26
1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Set-iterator-remove-1.js b/js/src/jit-test/tests/collections/Set-iterator-remove-1.js
new file mode 100644
index 0000000000..31ac12f1ac
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Set-iterator-remove-1.js
@@ -0,0 +1,26 @@
+// A set iterator can cope with removing the current entry.
+
+function test(letters, toRemove) {
+ var set = new Set(letters);
+ toRemove = new Set(toRemove);
+
+ var leftovers = [...set].filter(x => !toRemove.has(x)).join("");
+
+ var log = "";
+ for (let x of set) {
+ log += x;
+ if (toRemove.has(x))
+ set.delete(x);
+ }
+ assertEq(log, letters);
+
+ var remaining = [...set].join("");
+ assertEq(remaining, leftovers);
+}
+
+test('a', 'a'); // removing the only entry
+test('abc', 'a'); // removing the first entry
+test('abc', 'b'); // removing a middle entry
+test('abc', 'c'); // removing the last entry
+test('abc', 'abc') // removing all entries
+