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-rw-r--r--toolkit/components/workerloader/tests/moduleJ-dependency.js13
1 files changed, 13 insertions, 0 deletions
diff --git a/toolkit/components/workerloader/tests/moduleJ-dependency.js b/toolkit/components/workerloader/tests/moduleJ-dependency.js
new file mode 100644
index 0000000000..53114f4fd6
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+++ b/toolkit/components/workerloader/tests/moduleJ-dependency.js
@@ -0,0 +1,13 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/* eslint-env commonjs */
+
+exports.J = true;
+exports.foo = "foo";
+
+// Side-effect to detect if we attempt to re-execute this module.
+if ("loadedJ" in self) {
+ throw new Error("J has been evaluted twice");
+}
+self.loadedJ = true;