FEATURE: Support i18n in Ember CLI plugin tests

app/assets/javascripts/discourse/lib/translation-plugin.js

@@ -4,6 +4,8 @@ const fs = require("fs");
 const concat = require("broccoli-concat");
 const mergeTrees = require("broccoli-merge-trees");
 const MessageFormat = require("messageformat");
+const deepmerge = require("deepmerge");
+const glob = require("glob");
 
 let built = false;
 
@@ -40,10 +42,14 @@ class TranslationPlugin extends Plugin {
       return;
     }
 
-    let file = this.inputPaths[0] + "/" + this.inputFile;
+    let parsed = {};
 
-    let yaml = fs.readFileSync(file, { encoding: "UTF-8" });
+    this.inputPaths.forEach((path) => {
-    let parsed = Yaml.load(yaml);
+      let file = path + "/" + this.inputFile;
+      let yaml = fs.readFileSync(file, { encoding: "UTF-8" });
+      let loaded = Yaml.load(yaml);
+      parsed = deepmerge(parsed, loaded);
+    });
 
     let extras = {
       en: {
@@ -82,11 +88,14 @@ module.exports = function translatePlugin(...params) {
 };
 
 module.exports.createI18nTree = function (discourseRoot, vendorJs) {
-  let en = new TranslationPlugin(
+  let translations = [discourseRoot + "/config/locales"].concat(
-    [discourseRoot + "/config/locales"],
+    glob
-    "client.en.yml"
+      .sync(discourseRoot + "/plugins/*/config/locales/client.en.yml")
+      .map((f) => f.replace(/\/client\.en\.yml$/, ""))
   );
 
+  let en = new TranslationPlugin(translations, "client.en.yml");
+
   return concat(
     mergeTrees([
       vendorJs,

app/assets/javascripts/discourse/package.json

@@ -22,15 +22,16 @@
     "@ember/test-helpers": "^2.2.0",
     "@glimmer/component": "^1.0.0",
     "@popperjs/core": "2.10.2",
-    "@uppy/utils": "^4.0.3",
     "@uppy/aws-s3": "^2.0.4",
     "@uppy/aws-s3-multipart": "^2.1.0",
     "@uppy/core": "^2.1.0",
     "@uppy/drop-target": "^1.1.0",
+    "@uppy/utils": "^4.0.3",
     "@uppy/xhr-upload": "^2.0.4",
     "admin": "^1.0.0",
     "bent": "^7.3.12",
     "broccoli-asset-rev": "^3.0.0",
+    "deepmerge": "^4.2.2",
     "discourse-common": "^1.0.0",
     "discourse-hbr": "^1.0.0",
     "discourse-widget-hbs": "^1.0.0",

app/assets/javascripts/yarn.lock

@@ -4526,6 +4526,11 @@ deep-is@^0.1.3, deep-is@~0.1.3:
   resolved "https://registry.yarnpkg.com/deep-is/-/deep-is-0.1.3.tgz#b369d6fb5dbc13eecf524f91b070feedc357cf34"
   integrity sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=
 
+deepmerge@^4.2.2:
+  version "4.2.2"
+  resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-4.2.2.tgz#44d2ea3679b8f4d4ffba33f03d865fc1e7bf4955"
+  integrity sha512-FJ3UgI4gIl+PHZm53knsuSFpE+nESMr7M4v9QcgB7S63Kj/6WqMiFQJpBBYz1Pt+66bZpP3Q7Lye0Oo9MPKEdg==
+
 defaults@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/defaults/-/defaults-1.0.3.tgz#c656051e9817d9ff08ed881477f3fe4019f3ef7d"