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-rw-r--r--js/src/jit-test/tests/collections/key-equality-1.js28
1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/key-equality-1.js b/js/src/jit-test/tests/collections/key-equality-1.js
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+++ b/js/src/jit-test/tests/collections/key-equality-1.js
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+// Different representations of the same number or string are treated as the same Map key.
+
+var m = new Map;
+var test = function test(a, b) {
+ m.set(a, 'secret');
+ assertEq(m.get(b), 'secret');
+ m.set(b, 'password');
+ assertEq(m.get(a), 'password');
+
+ assertEq(a, b);
+};
+
+// Float and integer representations of the same number are the same key.
+test(9, Math.sqrt(81));
+
+// Ordinary strings and ropes are the same key.
+var a = Array(1001).join('x');
+var b = Array(501).join('x') + Array(501).join('x');
+test(a, b);
+
+// Two structurally different ropes with the same characters are the same key.
+a = "";
+b = "";
+for (var i = 0; i < 10; i++) {
+ a = Array(501).join('x') + a;
+ b = b + Array(501).join('x');
+}
+test(a, b);