1 files changed, 135 insertions, 0 deletions
diff --git a/toolkit/components/translations/tests/browser/browser_translations_full_page.js b/toolkit/components/translations/tests/browser/browser_translations_full_page.js
new file mode 100644
index 0000000000..7ee15902f8
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+++ b/toolkit/components/translations/tests/browser/browser_translations_full_page.js
@@ -0,0 +1,135 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Check that the full page translation feature works.
+ */
+add_task(async function test_full_page_translation() {
+  await autoTranslatePage({
+    page: SPANISH_PAGE_URL,
+    languagePairs: [
+      { fromLang: "es", toLang: "en" },
+      { fromLang: "en", toLang: "es" },
+    ],
+    runInPage: async TranslationsTest => {
+      const selectors = TranslationsTest.getSelectors();
+
+      await TranslationsTest.assertTranslationResult(
+        "The main title gets translated.",
+        selectors.getH1,
+        "DON QUIJOTE DE LA MANCHA [es to en, html]"
+      );
+
+      await TranslationsTest.assertTranslationResult(
+        "The last paragraph gets translated. It is out of the viewport.",
+        selectors.getLastParagraph,
+        "— PUES, AUNQUE MOVÁIS MÁS BRAZOS QUE LOS DEL GIGANTE BRIAREO, ME LO HABÉIS DE PAGAR. [es to en, html]"
+      );
+
+      selectors.getH1().innerText = "Este es un titulo";
+
+      await TranslationsTest.assertTranslationResult(
+        "Mutations get tracked",
+        selectors.getH1,
+        "ESTE ES UN TITULO [es to en]"
+      );
+
+      await TranslationsTest.assertTranslationResult(
+        "Other languages do not get translated.",
+        selectors.getHeader,
+        "The following is an excerpt from Don Quijote de la Mancha, which is in the public domain"
+      );
+    },
+  });
+});
+
+/**
+ * Check that the full page translation feature doesn't translate pages in the app's
+ * locale.
+ */
+add_task(async function test_about_translations_enabled() {
+  const { appLocaleAsBCP47 } = Services.locale;
+  if (!appLocaleAsBCP47.startsWith("en")) {
+    console.warn(
+      "This test assumes to be running in an 'en' app locale, however the app locale " +
+        `is set to ${appLocaleAsBCP47}. Skipping the test.`
+    );
+    ok(true, "Skipping test.");
+    return;
+  }
+
+  await autoTranslatePage({
+    page: ENGLISH_PAGE_URL,
+    languagePairs: [
+      { fromLang: "es", toLang: "en" },
+      { fromLang: "en", toLang: "es" },
+    ],
+    runInPage: async () => {
+      const { document } = content;
+
+      for (let i = 0; i < 5; i++) {
+        // There is no way to directly check the non-existence of a translation, as
+        // the translations engine works async, and you can't dispatch a CustomEvent
+        // to listen for translations, as this script runs after the initial translations
+        // check. So resort to a setTimeout and check a few times. This relies on timing,
+        // but _cannot fail_ if it's working correctly. It _will most likely fail_ if
+        // this page accidentally gets translated.
+
+        const timeout = 10;
+
+        info("Waiting for the timeout.");
+        // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+        await new Promise(resolve => setTimeout(resolve, timeout));
+        is(
+          document.querySelector("h1").innerText,
+          `"The Wonderful Wizard of Oz" by L. Frank Baum`,
+          `The page remains untranslated after ${(i + 1) * timeout}ms.`
+        );
+      }
+    },
+  });
+});
+
+/**
+ * Check that the full page translation feature works.
+ */
+add_task(async function test_language_identification_for_page_translation() {
+  await autoTranslatePage({
+    page: NO_LANGUAGE_URL,
+    languagePairs: [
+      { fromLang: "es", toLang: "en" },
+      { fromLang: "en", toLang: "es" },
+    ],
+    runInPage: async TranslationsTest => {
+      const selectors = TranslationsTest.getSelectors();
+
+      await TranslationsTest.assertTranslationResult(
+        "The main title gets translated.",
+        selectors.getH1,
+        "DON QUIJOTE DE LA MANCHA [es to en, html]"
+      );
+
+      await TranslationsTest.assertTranslationResult(
+        "The last paragraph gets translated. It is out of the viewport.",
+        selectors.getLastParagraph,
+        "— PUES, AUNQUE MOVÁIS MÁS BRAZOS QUE LOS DEL GIGANTE BRIAREO, ME LO HABÉIS DE PAGAR. [es to en, html]"
+      );
+
+      selectors.getH1().innerText = "Este es un titulo";
+
+      await TranslationsTest.assertTranslationResult(
+        "Mutations get tracked",
+        selectors.getH1,
+        "ESTE ES UN TITULO [es to en]"
+      );
+
+      await TranslationsTest.assertTranslationResult(
+        "Other languages do not get translated.",
+        selectors.getHeader,
+        "The following is an excerpt from Don Quijote de la Mancha, which is in the public domain"
+      );
+    },
+  });
+});