1 files changed, 46 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/importscript_worker.js b/dom/serviceworkers/test/importscript_worker.js
new file mode 100644
index 0000000000..2ade477f63
--- /dev/null
+++ b/dom/serviceworkers/test/importscript_worker.js
@@ -0,0 +1,46 @@
+var counter = 0;
+function callByScript() {
+  ++counter;
+}
+
+// Use multiple scripts in this load to verify we support that case correctly.
+// See bug 1249351 for a case where we broke this.
+importScripts("lorem_script.js", "importscript.sjs");
+
+importScripts("importscript.sjs");
+
+var missingScriptFailed = false;
+try {
+  importScripts(["there-is-nothing-here.js"]);
+} catch (e) {
+  missingScriptFailed = true;
+}
+
+onmessage = function (e) {
+  self.clients.matchAll().then(function (res) {
+    if (!res.length) {
+      dump("ERROR: no clients are currently controlled.\n");
+    }
+
+    if (!missingScriptFailed) {
+      res[0].postMessage("KO");
+    }
+
+    try {
+      // new unique script should fail
+      importScripts(["importscript.sjs?unique=true"]);
+      res[0].postMessage("KO");
+      return;
+    } catch (ex) {}
+
+    try {
+      // duplicate script previously offlined should succeed
+      importScripts(["importscript.sjs"]);
+    } catch (ex) {
+      res[0].postMessage("KO");
+      return;
+    }
+
+    res[0].postMessage(counter == 3 ? "OK" : "KO");
+  });
+};