searchfilters: added common helper methods for .*SearchExtractorTest's

Author: evermind-zz

extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultSearchExtractorTest.java

@@ -2,17 +2,21 @@
 
 import org.junit.jupiter.api.Test;
 import org.schabi.newpipe.extractor.MetaInfo;
+import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.search.SearchExtractor;
-
-
-import javax.annotation.Nullable;
+import org.schabi.newpipe.extractor.search.filter.FilterContainer;
+import org.schabi.newpipe.extractor.search.filter.FilterGroup;
+import org.schabi.newpipe.extractor.search.filter.FilterItem;
 
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 
+import javax.annotation.Nullable;
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.schabi.newpipe.extractor.ExtractorAsserts.assertEmpty;
@@ -21,8 +25,34 @@
 public abstract class DefaultSearchExtractorTest extends DefaultListExtractorTest<SearchExtractor>
         implements BaseSearchExtractorTest {
 
+    public static FilterItem getFilterItem(final StreamingService service, final int filterId) {
+        return service.getSearchQHFactory().getFilterItem(filterId);
+    }
+
+    public static int getNoOfSortFilterItems(final FilterContainer contentFilterContainer) {
+        // for all content filter groups count available corresponding sort filters
+        int filterItemsCount = 0;
+        for (final FilterGroup group : contentFilterContainer.getFilterGroups()) {
+            final FilterContainer sortFilterContainer = group.getAllSortFilters();
+            if (null != sortFilterContainer) {
+                filterItemsCount += getNoOfFilterItems(sortFilterContainer);
+            }
+        }
+
+        return filterItemsCount;
+    }
+
+    public static int getNoOfFilterItems(final FilterContainer filterContainer) {
+        return Arrays.stream(filterContainer.getFilterGroups())
+                .map(FilterGroup::getFilterItems)
+                .mapToInt(filterItems -> filterItems.length)
+                .sum();
+    }
+
     public abstract String expectedSearchString();
-    @Nullable public abstract String expectedSearchSuggestion();
+
+    @Nullable
+    public abstract String expectedSearchSuggestion();
 
     public boolean isCorrectedSearch() {
         return false;