[libcalamares] Add tests for the locale service

- Minimal tests just check that all the availableTranslations()
   entries have a reasonable language setting.
 - Checks that Esperanto is still broken as a locale in Qt.

src/libcalamares/CMakeLists.txt

@@ -177,6 +177,16 @@ if ( ECM_FOUND AND BUILD_TESTING )
             Qt5::Test
     )
     calamares_automoc( libcalamarespartitiontest )
+
+    ecm_add_test(
+            locale/Tests.cpp
+        TEST_NAME
+            libcalamareslocaletest
+        LINK_LIBRARIES
+            calamares
+            Qt5::Test
+    )
+    calamares_automoc( libcalamareslocaletest )
 endif()
 
 if( BUILD_TESTING )

src/libcalamares/locale/Tests.cpp

@@ -0,0 +1,87 @@
+/* === This file is part of Calamares - <https://github.com/calamares> ===
+ *
+ *   Copyright 2019, Adriaan de Groot <groot@kde.org>
+ *
+ *   Calamares is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Tests.h"
+
+#include "locale/LabelModel.h"
+#include "utils/Logger.h"
+
+#include <QtTest/QtTest>
+
+QTEST_GUILESS_MAIN( LocaleTests )
+
+LocaleTests::LocaleTests()
+{
+}
+
+LocaleTests::~LocaleTests()
+{
+}
+
+void
+LocaleTests::initTestCase()
+{
+}
+
+void
+LocaleTests::testLanguageModelCount()
+{
+    const auto* m = CalamaresUtils::Locale::availableTranslations();
+
+    QVERIFY( m );
+    QVERIFY( m->rowCount( QModelIndex() ) > 1 );
+
+    int dutch = m->find( QLocale( "nl_NL" ) );
+    QVERIFY( dutch > 0 );
+    QCOMPARE( m->find( "NL" ), dutch );
+    // must be capitals
+    QCOMPARE( m->find( "nl" ), -1 );
+    QCOMPARE( m->find( QLocale( "nl" ) ), dutch );
+
+    // Belgium speaks Dutch as well
+    QCOMPARE( m->find( "BE" ), dutch );
+}
+
+void
+LocaleTests::testEsperanto()
+{
+    Logger::setupLogLevel( Logger::LOGDEBUG );
+
+    const auto* m = CalamaresUtils::Locale::availableTranslations();
+
+    QVERIFY( m );
+
+    // Cursory test that all the locales found have a sensible language,
+    // and that some specific languages have sensible corresponding data.
+    //
+    // This fails on Esperanto (or, if Esperanto is added to Qt, then
+    // this will pass and the test after the loop will fail.
+    for ( int i = 0; i < m->rowCount( QModelIndex() ); ++i )
+    {
+        const auto& label = m->locale( i );
+        const auto locale = label.locale();
+        cDebug() << label.label() << locale;
+
+        QVERIFY( locale.language() == QLocale::Greek ? locale.script() == QLocale::GreekScript : true );
+        QVERIFY( locale.language() == QLocale::Korean ? locale.script() == QLocale::KoreanScript : true );
+        QVERIFY( locale.language() == QLocale::Lithuanian ? locale.country() == QLocale::Lithuania : true );
+        QVERIFY( locale.language() != QLocale::C );
+    }
+
+    QCOMPARE( QLocale( "eo" ).language(), QLocale::C );
+}

src/libcalamares/locale/Tests.h

@@ -0,0 +1,38 @@
+/* === This file is part of Calamares - <https://github.com/calamares> ===
+ *
+ *   Copyright 2019, Adriaan de Groot <groot@kde.org>
+ *
+ *   Calamares is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBCALAMARES_LOCALE_TESTS_H
+#define LIBCALAMARES_LOCALE_TESTS_H
+
+#include <QObject>
+
+class LocaleTests : public QObject
+{
+    Q_OBJECT
+public:
+    LocaleTests();
+    ~LocaleTests() override;
+
+private Q_SLOTS:
+    void initTestCase();
+
+    void testLanguageModelCount();
+    void testEsperanto();
+};
+
+#endif