1 files changed, 98 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/xpcshell/test_ext_contentscript_exporthelpers.js b/toolkit/components/extensions/test/xpcshell/test_ext_contentscript_exporthelpers.js
new file mode 100644
index 0000000000..ec3b11ee7d
--- /dev/null
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_contentscript_exporthelpers.js
@@ -0,0 +1,98 @@
+"use strict";
+
+const server = createHttpServer({ hosts: ["example.com"] });
+server.registerDirectory("/data/", do_get_file("data"));
+
+add_task(async function test_contentscript_exportHelpers() {
+  function contentScript() {
+    browser.test.assertTrue(typeof cloneInto === "function");
+    browser.test.assertTrue(typeof createObjectIn === "function");
+    browser.test.assertTrue(typeof exportFunction === "function");
+
+    /* globals exportFunction, precisePi, reportPi */
+    let value = 3.14;
+    exportFunction(() => value, window, { defineAs: "precisePi" });
+
+    browser.test.assertEq(
+      "undefined",
+      typeof precisePi,
+      "exportFunction should export to the page's scope only"
+    );
+
+    browser.test.assertEq(
+      "undefined",
+      typeof window.precisePi,
+      "exportFunction should export to the page's scope only"
+    );
+
+    let results = [];
+    exportFunction(pi => results.push(pi), window, { defineAs: "reportPi" });
+
+    let s = document.createElement("script");
+    s.textContent = `(${function () {
+      let result1 = "unknown 1";
+      let result2 = "unknown 2";
+      try {
+        result1 = precisePi();
+      } catch (e) {
+        result1 = "err:" + e;
+      }
+      try {
+        result2 = window.precisePi();
+      } catch (e) {
+        result2 = "err:" + e;
+      }
+      reportPi(result1);
+      reportPi(result2);
+    }})();`;
+
+    document.documentElement.appendChild(s);
+    // Inline script ought to run synchronously.
+
+    browser.test.assertEq(
+      3.14,
+      results[0],
+      "exportFunction on window should define a global function"
+    );
+    browser.test.assertEq(
+      3.14,
+      results[1],
+      "exportFunction on window should export a property to window."
+    );
+
+    browser.test.assertEq(
+      2,
+      results.length,
+      "Expecting the number of results to match the number of method calls"
+    );
+
+    browser.test.notifyPass("export helper test completed");
+  }
+
+  let extensionData = {
+    manifest: {
+      content_scripts: [
+        {
+          js: ["contentscript.js"],
+          matches: ["http://example.com/data/file_sample.html"],
+          run_at: "document_start",
+        },
+      ],
+    },
+
+    files: {
+      "contentscript.js": contentScript,
+    },
+  };
+
+  let extension = ExtensionTestUtils.loadExtension(extensionData);
+  await extension.startup();
+
+  let contentPage = await ExtensionTestUtils.loadContentPage(
+    "http://example.com/data/file_sample.html"
+  );
+
+  await extension.awaitFinish("export helper test completed");
+  await contentPage.close();
+  await extension.unload();
+});