Bug 1199832 - [webext] browser.tabs.executeScript must create a context (r=gabor)

browser/components/extensions/test/browser/browser.ini

@@ -1,3 +1,4 @@
 [browser_extensions_simple.js]
+[browser_ext_tabs_executeScript.js]
 [browser_ext_tabs_query.js]
 [browser_ext_tabs_update.js]

browser/components/extensions/test/browser/browser_ext_tabs_executeScript.js

@@ -0,0 +1,32 @@
+add_task(function* () {
+  let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, "http://mochi.test:8888/");
+
+  let extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      "permissions": ["tabs"]
+    },
+
+    background: function() {
+      browser.runtime.onMessage.addListener((msg, sender) => {
+        browser.test.assertEq(msg, "script ran", "script ran");
+        browser.test.notifyPass("executeScript");
+      });
+
+      browser.tabs.executeScript({
+        file: "script.js"
+      });
+    },
+
+    files: {
+      "script.js": function() {
+        browser.runtime.sendMessage("script ran");
+      }
+    }
+  });
+
+  yield extension.startup();
+  yield extension.awaitFinish("executeScript");
+  yield extension.unload();
+
+  yield BrowserTestUtils.removeTab(tab);
+});

toolkit/components/extensions/ExtensionContent.jsm

@@ -336,11 +336,7 @@ let DocumentManager = {
 
   executeScript(global, extensionId, script) {
     let window = global.content;
-    let extensions = this.windows.get(window);
-    if (!extensions) {
-      return;
-    }
-    let context = extensions.get(extensionId);
+    let context = this.getContext(extensionId, window);
     if (!context) {
       return;
     }