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-rw-r--r--js/src/jit-test/tests/collections/Map-constructor-3.js9
1 files changed, 9 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Map-constructor-3.js b/js/src/jit-test/tests/collections/Map-constructor-3.js
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index 000000000..601a76188
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Map-constructor-3.js
@@ -0,0 +1,9 @@
+// Map can take an argument that is an array of singleton arrays.
+
+var arr = [["a"], ["b"], ["c"]];
+var m = new Map(arr);
+assertEq(m.size, 3);
+for (var [k, _] of arr) {
+ assertEq(m.has(k), true);
+ assertEq(m.get(k), undefined);
+}