Some slight refactoring, test filtering books

app/src/androidTest/java/org/bspeice/minimalbible/test/activity/downloader/BookListFragmentTest.java

@@ -0,0 +1,70 @@
+package org.bspeice.minimalbible.test.activity.downloader;
+
+import org.bspeice.minimalbible.MBTestCase;
+import org.bspeice.minimalbible.activity.downloader.BookListFragment;
+import org.crosswire.common.util.Language;
+import org.crosswire.jsword.book.Book;
+import org.crosswire.jsword.book.BookCategory;
+import org.mockito.Mockito;
+
+import rx.Observable;
+import rx.functions.Action1;
+
+import static org.mockito.Mockito.when;
+
+public class BookListFragmentTest extends MBTestCase {
+
+    public void testBooksByLanguage() throws Exception {
+        BookCategory bibleCategory = BookCategory.BIBLE;
+        BookCategory dictionaryCategory = BookCategory.DICTIONARY;
+        Language russianLanguage = new Language("ru");
+        Language englishLanguage = new Language("en");
+
+        final Book russianBible = Mockito.mock(Book.class);
+        when(russianBible.getBookCategory()).thenReturn(bibleCategory);
+        when(russianBible.getLanguage()).thenReturn(russianLanguage);
+
+        final Book englishBible = Mockito.mock(Book.class);
+        when(englishBible.getBookCategory()).thenReturn(bibleCategory);
+        when(englishBible.getLanguage()).thenReturn(englishLanguage);
+
+        final Book englishDictionary = Mockito.mock(Book.class);
+        when(englishDictionary.getBookCategory()).thenReturn(dictionaryCategory);
+        when(englishDictionary.getLanguage()).thenReturn(englishLanguage);
+
+        Observable<Book> mockBooks = Observable.just(russianBible, englishBible,
+                englishDictionary);
+
+        // Since we're not testing lifecycle here, don't worry about newInstance()
+        TestableBookListFragment fragment = new TestableBookListFragment();
+
+        fragment.booksByLanguage(mockBooks, englishLanguage, bibleCategory)
+                .subscribe(new Action1<Book>() {
+                    @Override
+                    public void call(Book book) {
+                        assertEquals(englishBible, book);
+                    }
+                });
+        fragment.booksByLanguage(mockBooks, russianLanguage, bibleCategory)
+                .subscribe(new Action1<Book>() {
+                    @Override
+                    public void call(Book book) {
+                        assertEquals(russianBible, book);
+                    }
+                });
+        fragment.booksByLanguage(mockBooks, englishLanguage, dictionaryCategory)
+                .subscribe(new Action1<Book>() {
+                    @Override
+                    public void call(Book book) {
+                        assertEquals(englishDictionary, book);
+                    }
+                });
+    }
+
+    public static class TestableBookListFragment extends BookListFragment {
+        @Override
+        public Observable<Book> booksByLanguage(Observable<Book> books, Language language, BookCategory category) {
+            return super.booksByLanguage(books, language, category);
+        }
+    }
+}

app/src/main/java/org/bspeice/minimalbible/activity/downloader/BookListFragment.java

@@ -18,6 +18,7 @@ import org.bspeice.minimalbible.Injector;
 import org.bspeice.minimalbible.R;
 import org.bspeice.minimalbible.activity.BaseFragment;
 import org.bspeice.minimalbible.activity.downloader.manager.RefreshManager;
+import org.crosswire.common.util.Language;
 import org.crosswire.jsword.book.Book;
 import org.crosswire.jsword.book.BookCategory;
 import org.crosswire.jsword.book.BookComparators;
@@ -30,6 +31,7 @@ import javax.inject.Inject;
 import butterknife.ButterKnife;
 import butterknife.InjectView;
 import butterknife.OnItemSelected;
+import rx.Observable;
 import rx.android.schedulers.AndroidSchedulers;
 import rx.functions.Action1;
 import rx.functions.Func1;
@@ -47,7 +49,7 @@ public class BookListFragment extends BaseFragment {
     protected ProgressDialog refreshDialog;
     @Inject RefreshManager refreshManager;
     @Inject
-    List<String> availableLanguages;
+    List<Language> availableLanguages;
 
     @InjectView(R.id.lst_download_available)
     ListView downloadsAvailable;
@@ -153,22 +155,9 @@ public class BookListFragment extends BaseFragment {
     @SuppressWarnings("unused")
     @OnItemSelected(R.id.spn_available_languages)
     public void onClick(final int position) {
-        refreshManager.getFlatModules()
-                .filter(new Func1<Book, Boolean>() {
-                    @Override
-                    public Boolean call(Book book) {
-                        return book.getBookCategory() ==
-                                BookCategory.fromString(BookListFragment.this.getArguments()
-                                        .getString(ARG_BOOK_CATEGORY));
-                    }
-                })
-                .filter(new Func1<Book, Boolean>() {
-                    @Override
-                    public Boolean call(Book book) {
-                        return book.getLanguage().getName()
-                                .equals(availableLanguages.get(position));
-                    }
-                })
+        booksByLanguage(refreshManager.getFlatModules(),
+                availableLanguages.get(position),
+                BookCategory.fromString(getArguments().getString(ARG_BOOK_CATEGORY)))
                 // Repack all the books
                 .toSortedList(new Func2<Book, Book, Integer>() {
                     @Override
@@ -187,6 +176,25 @@ public class BookListFragment extends BaseFragment {
                 });
     }
 
+    protected Observable<Book> booksByLanguage(Observable<Book> books, final Language language,
+                                               final BookCategory category) {
+        return books
+                .filter(new Func1<Book, Boolean>() {
+                    @Override
+                    public Boolean call(Book book) {
+                        return book.getBookCategory() == category;
+                    }
+                })
+                .filter(new Func1<Book, Boolean>() {
+                    @Override
+                    public Boolean call(Book book) {
+                        // Language doesn't properly implement .equals(), so use Strings
+                        return book.getLanguage().getCode()
+                                .equals(language.getCode());
+                    }
+                });
+    }
+
     private class DownloadDialogListener implements
             DialogInterface.OnClickListener {
         @Override

app/src/main/java/org/bspeice/minimalbible/activity/downloader/DownloadActivityModules.java

@@ -9,6 +9,7 @@ import org.bspeice.minimalbible.activity.downloader.manager.BookDownloadManager;
 import org.bspeice.minimalbible.activity.downloader.manager.InstalledManager;
 import org.bspeice.minimalbible.activity.downloader.manager.LocaleManager;
 import org.bspeice.minimalbible.activity.downloader.manager.RefreshManager;
+import org.crosswire.common.util.Language;
 import org.crosswire.jsword.book.Book;
 import org.crosswire.jsword.book.BookCategory;
 import org.crosswire.jsword.book.Books;
@@ -120,8 +121,7 @@ public class DownloadActivityModules {
     }
 
     @Provides
-    List<String> availableLanguages(LocaleManager localeManager) {
-        final List<String> languages = new ArrayList<String>();
+    List<Language> availableLanguages(LocaleManager localeManager) {
         return localeManager.getSortedLanguagesList();
     }
 }

app/src/main/kotlin/org/bspeice/minimalbible/activity/downloader/manager/LocaleManager.kt

@@ -1,23 +1,31 @@
 package org.bspeice.minimalbible.activity.downloader.manager
 
 import org.crosswire.common.util.Language
+import rx.Observable
 
 class LocaleManager(val rM: RefreshManager) {
 
-    val currentLanguage = Language.DEFAULT_LANG.getName()
-    val languageModuleMap = rM.flatModules
-            .map { it.getLanguage() ?: Language(Language.UNKNOWN_LANG_CODE) }
-            .groupBy { it.getName() }
+    val currentLanguage = Language.DEFAULT_LANG
 
-    val availableLanguages = languageModuleMap.map { it.getKey() }
-    val sortedLanguagesList: List<String> =
+    val languageModuleMap = rM.flatModules
+            // Language doesn't have hashCode(), so we actually group by its String
+            .groupBy { FixedLanguage(it.getLanguage()) }
+
+    // Cast back to the original Language implementation
+    val availableLanguages: Observable<Language> = languageModuleMap.map { it.getKey() }
+    val sortedLanguagesList =
             availableLanguages.toSortedList {(left, right) ->
                 // Prioritize our current language first
-                if (left == currentLanguage)
+                if (left.getName() == currentLanguage.getName())
                     -1
-                else if (right == currentLanguage)
+                else if (right.getName() == currentLanguage.getName())
                     1
                 else
-                    left.compareTo(right)
+                    left.getName().compareTo(right.getName())
             }.toBlocking().first()
+}
+
+class FixedLanguage(language: Language?) :
+        Language(language?.getCode() ?: Language.UNKNOWN_LANG_CODE) {
+    override fun hashCode() = this.getName().hashCode()
 }