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-rw-r--r--js/src/jit-test/tests/debug/Object-asEnvironment-01.js15
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diff --git a/js/src/jit-test/tests/debug/Object-asEnvironment-01.js b/js/src/jit-test/tests/debug/Object-asEnvironment-01.js
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index 0000000000..39bfe4dabf
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+++ b/js/src/jit-test/tests/debug/Object-asEnvironment-01.js
@@ -0,0 +1,15 @@
+// Tests D.O.asEnvironment() returning the global lexical scope.
+
+var g = newGlobal({newCompartment: true});
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+
+g.evaluate(`
+ var x = 42;
+ let y = "foo"
+`);
+
+var globalLexical = gw.asEnvironment();
+assertEq(globalLexical.names().length, 1);
+assertEq(globalLexical.getVariable("y"), "foo");
+assertEq(globalLexical.parent.getVariable("x"), 42);