osr-discourse-src/app/assets/javascripts/discourse/tests/unit/localization-test.js

import { module, test } from "qunit";
import I18n from "I18n";
import LocalizationInitializer from "discourse/initializers/localization";
import { getApplication } from "@ember/test-helpers";

module("initializer:localization", {
  _locale: I18n.locale,
  _translations: I18n.translations,
  _extras: I18n.extras,
  _compiledMFs: I18n._compiledMFs,
  _overrides: I18n._overrides,
  _mfOverrides: I18n._mfOverrides,

  beforeEach() {
    I18n.locale = "fr";

    I18n.translations = {
      fr: {
        js: {
          composer: {
            both_languages1: "composer.both_languages1 (FR)",
            both_languages2: "composer.both_languages2 (FR)",
          },
        },
      },
      en: {
        js: {
          composer: {
            both_languages1: "composer.both_languages1 (EN)",
            both_languages2: "composer.both_languages2 (EN)",
            only_english1: "composer.only_english1 (EN)",
            only_english2: "composer.only_english2 (EN)",
          },
        },
      },
    };

    I18n._compiledMFs = {
      "user.messages.some_key_MF": () => "user.messages.some_key_MF (FR)",
    };

    I18n.extras = {
      fr: {
        admin: {
          api: {
            both_languages1: "admin.api.both_languages1 (FR)",
            both_languages2: "admin.api.both_languages2 (FR)",
          },
        },
      },
      en: {
        admin: {
          api: {
            both_languages1: "admin.api.both_languages1 (EN)",
            both_languages2: "admin.api.both_languages2 (EN)",
            only_english1: "admin.api.only_english1 (EN)",
            only_english2: "admin.api.only_english2 (EN)",
          },
        },
      },
    };
  },

  afterEach() {
    I18n.locale = this._locale;
    I18n.translations = this._translations;
    I18n.extras = this._extras;
    I18n._compiledMFs = this._compiledMFs;
    I18n._overrides = this._overrides;
    I18n._mfOverrides = this._mfOverrides;
  },
});

test("translation overrides", function (assert) {
  I18n._overrides = {
    fr: {
      "js.composer.both_languages1": "composer.both_languages1 (FR override)",
      "js.composer.only_english2": "composer.only_english2 (FR override)",
    },
    en: {
      "js.composer.both_languages2": "composer.both_languages2 (EN override)",
      "js.composer.only_english1": "composer.only_english1 (EN override)",
    },
  };
  LocalizationInitializer.initialize(getApplication());

  assert.strictEqual(
    I18n.t("composer.both_languages1"),
    "composer.both_languages1 (FR override)",
    "overrides existing translation in current locale"
  );

  assert.strictEqual(
    I18n.t("composer.only_english1"),
    "composer.only_english1 (EN override)",
    "overrides translation in fallback locale"
  );

  assert.strictEqual(
    I18n.t("composer.only_english2"),
    "composer.only_english2 (FR override)",
    "overrides translation that doesn't exist in current locale"
  );

  assert.strictEqual(
    I18n.t("composer.both_languages2"),
    "composer.both_languages2 (FR)",
    "prefers translation in current locale over override in fallback locale"
  );
});

test("translation overrides (admin_js)", function (assert) {
  I18n._overrides = {
    fr: {
      "admin_js.api.both_languages1": "admin.api.both_languages1 (FR override)",
      "admin_js.api.only_english2": "admin.api.only_english2 (FR override)",
    },
    en: {
      "admin_js.api.both_languages2": "admin.api.both_languages2 (EN override)",
      "admin_js.api.only_english1": "admin.api.only_english1 (EN override)",
    },
  };
  LocalizationInitializer.initialize(getApplication());

  assert.strictEqual(
    I18n.t("admin.api.both_languages1"),
    "admin.api.both_languages1 (FR override)",
    "overrides existing translation in current locale"
  );

  assert.strictEqual(
    I18n.t("admin.api.only_english1"),
    "admin.api.only_english1 (EN override)",
    "overrides translation in fallback locale"
  );

  assert.strictEqual(
    I18n.t("admin.api.only_english2"),
    "admin.api.only_english2 (FR override)",
    "overrides translation that doesn't exist in current locale"
  );

  assert.strictEqual(
    I18n.t("admin.api.both_languages2"),
    "admin.api.both_languages2 (FR)",
    "prefers translation in current locale over override in fallback locale"
  );
});

test("translation overrides for MessageFormat strings", function (assert) {
  I18n._mfOverrides = {
    "js.user.messages.some_key_MF": () =>
      "user.messages.some_key_MF (FR override)",
  };

  LocalizationInitializer.initialize(getApplication());

  assert.strictEqual(
    I18n.messageFormat("user.messages.some_key_MF", {}),
    "user.messages.some_key_MF (FR override)",
    "overrides existing MessageFormat string"
  );
});

test("skip translation override if parent node is not an object", function (assert) {
  I18n._overrides = {
    fr: {
      "js.composer.both_languages1.foo":
        "composer.both_languages1.foo (FR override)",
    },
  };
  LocalizationInitializer.initialize(getApplication());

  assert.strictEqual(
    I18n.t("composer.both_languages1.foo"),
    "[fr.composer.both_languages1.foo]"
  );
});