Integrate actual translations into integration tests

src/core/client/framework/testHelpers/createFluentBundle.ts

@@ -0,0 +1,27 @@
+import { FluentBundle } from "fluent/compat";
+import fs from "fs";
+import path from "path";
+
+// These locale prefixes are always loaded.
+const commonPrefixes = ["common", "framework"];
+
+function createFluentBundle(
+  target: string,
+  pathToLocale: string
+): FluentBundle {
+  const bundle = new FluentBundle("en-US");
+  const files = fs.readdirSync(pathToLocale);
+  const prefixes = commonPrefixes.concat(target);
+  files.forEach(f => {
+    prefixes.forEach(prefix => {
+      if (f.startsWith(prefix)) {
+        bundle.addMessages(
+          fs.readFileSync(path.resolve(pathToLocale, f)).toString()
+        );
+      }
+    });
+  });
+  return bundle;
+}
+
+export default createFluentBundle;

src/core/client/framework/testHelpers/index.ts

@@ -2,3 +2,5 @@ export {
   default as createRelayEnvironment,
   CreateRelayEnvironmentParams,
 } from "./createRelayEnvironment";
+
+export { default as createFluentBundle } from "./createFluentBundle";