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-rw-r--r--js/src/tests/ecma_6/Symbol/equality.js30
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diff --git a/js/src/tests/ecma_6/Symbol/equality.js b/js/src/tests/ecma_6/Symbol/equality.js
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+++ b/js/src/tests/ecma_6/Symbol/equality.js
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+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+// Symbol.for returns the same symbol whenever the same argument is passed.
+assertEq(Symbol.for("q") === Symbol.for("q"), true);
+
+// Several distinct Symbol values.
+var symbols = [
+ Symbol(),
+ Symbol("Symbol.iterator"),
+ Symbol("Symbol.iterator"), // distinct new symbol with the same description
+ Symbol.for("Symbol.iterator"),
+ Symbol.iterator
+];
+
+// Distinct symbols are never equal to each other, even if they have the same
+// description.
+for (var i = 0; i < symbols.length; i++) {
+ for (var j = i; j < symbols.length; j++) {
+ var expected = (i === j);
+ assertEq(symbols[i] == symbols[j], expected);
+ assertEq(symbols[i] != symbols[j], !expected);
+ assertEq(symbols[i] === symbols[j], expected);
+ assertEq(symbols[i] !== symbols[j], !expected);
+ assertEq(Object.is(symbols[i], symbols[j]), expected);
+ }
+}
+
+if (typeof reportCompare === "function")
+ reportCompare(0, 0);