1 files changed, 49 insertions, 0 deletions
diff --git a/toolkit/mozapps/extensions/test/xpcshell/head_compat.js b/toolkit/mozapps/extensions/test/xpcshell/head_compat.js
new file mode 100644
index 0000000000..70e084d307
--- /dev/null
+++ b/toolkit/mozapps/extensions/test/xpcshell/head_compat.js
@@ -0,0 +1,49 @@
+//
+// This file provides helpers for tests of addons that use strictCompatibility.
+// Since WebExtensions cannot opt out of strictCompatibility, we add a
+// simple extension loader that lets tests directly set AddonInternal
+// properties (including strictCompatibility)
+//
+
+/* import-globals-from head_addons.js */
+
+const MANIFEST = "compat_manifest.json";
+
+AddonManager.addExternalExtensionLoader({
+  name: "compat-test",
+  manifestFile: MANIFEST,
+  async loadManifest(pkg) {
+    // XPIDatabase.jsm gets unloaded in AddonTestUtils when the
+    // addon manager is restarted.  Work around that by just importing
+    // it every time we need to create an AddonInternal.
+    const { AddonInternal } = ChromeUtils.import(
+      "resource://gre/modules/addons/XPIDatabase.jsm"
+    );
+    let addon = new AddonInternal();
+    let manifest = JSON.parse(await pkg.readString(MANIFEST));
+    Object.assign(addon, manifest);
+    return addon;
+  },
+  loadScope(addon, file) {
+    return {
+      install() {},
+      uninstall() {},
+      startup() {},
+      shutdonw() {},
+    };
+  },
+});
+
+const DEFAULTS = {
+  defaultLocale: {},
+  locales: [],
+  targetPlatforms: [],
+  type: "extension",
+  version: "1.0",
+};
+
+function createAddon(manifest) {
+  return AddonTestUtils.createTempXPIFile({
+    [MANIFEST]: Object.assign({}, DEFAULTS, manifest),
+  });
+}