Fixed recent found bugs

-Fixed: addAll with non Specific Collections was crashing lists.
-Fixed/Refactor: Clear and trim implementation was all over the place
-Fixed: Wrappers toString/hashCode/equals function wasn't implemented
-Added: Tests for addAll bug
-Refactor: Did small code style cleanups as I was fixing bugs.

src/test/java/speiger/src/collections/ints/base/BaseIntCollectionTest.java

@@ -2,6 +2,7 @@ package speiger.src.collections.ints.base;
 
 import java.util.Arrays;
 import java.util.EnumSet;
+import java.util.List;
 import java.util.stream.IntStream;
 
 import org.junit.Assert;
@@ -12,6 +13,7 @@ import speiger.src.collections.ints.utils.IntArrays;
 import speiger.src.collections.ints.utils.IntCollections;
 import speiger.src.collections.ints.utils.IntCollections.SynchronizedCollection;
 import speiger.src.collections.ints.utils.IntCollections.UnmodifiableCollection;
+import speiger.src.collections.objects.lists.ObjectArrayList;
 import speiger.src.collections.tests.CollectionTest;
 
 @SuppressWarnings("javadoc")
@@ -47,6 +49,9 @@ public abstract class BaseIntCollectionTest extends BaseIntIterableTest
 		Assert.assertEquals(TEST_ARRAY.length, collection.size());
 		collection.addAll(create(BULK_ADD_ARRAY));
 		Assert.assertEquals(TEST_ARRAY.length + BULK_ADD_ARRAY.length, collection.size());
+		// Testing if adding via non Type Specific work like they should
+		List<Integer> wrapper = new ObjectArrayList<>(create(ADD_ARRAY));
+		Assert.assertNotNull(create(ADD_ARRAY).addAll(wrapper));
 	}
 	
 	@Test
@@ -163,4 +168,14 @@ public abstract class BaseIntCollectionTest extends BaseIntIterableTest
 		collection = IntCollections.unmodifiable(collection);
 		Assert.assertTrue(collection instanceof UnmodifiableCollection);
 	}
+	
+	@Test
+	public void testToString() {
+		if(!getValidCollectionTests().contains(CollectionTest.TO_STRING)) return;
+		String base = Arrays.toString(BULK_ADD_ARRAY);
+		IntCollection collection = create(BULK_ADD_ARRAY);
+		Assert.assertEquals(base, collection.toString());
+		Assert.assertEquals(base, IntCollections.synchronize(collection).toString());
+		Assert.assertEquals(base, IntCollections.unmodifiable(collection).toString());
+	}
 }

src/test/java/speiger/src/collections/ints/sets/IntHashSetTests.java

@@ -6,6 +6,7 @@ import speiger.src.collections.ints.base.BaseIntCollectionTest;
 import speiger.src.collections.ints.base.BaseIntSortedSetTest;
 import speiger.src.collections.ints.collections.IntCollection;
 import speiger.src.collections.ints.utils.IntStrategy;
+import speiger.src.collections.tests.CollectionTest;
 import speiger.src.collections.tests.SortedSetTest;
 
 @SuppressWarnings("javadoc")
@@ -21,6 +22,14 @@ public class IntHashSetTests
 	{
 		@Override
 		protected IntCollection create(int[] data) { return new IntOpenHashSet(data); }
+		
+		@Override
+		protected EnumSet<CollectionTest> getValidCollectionTests()
+		{
+			EnumSet<CollectionTest> tests = super.getValidCollectionTests();
+			tests.remove(CollectionTest.TO_STRING);
+			return tests;
+		}
 	}
 	
 	public static class IntLinkedOpenHashSetTests extends BaseIntOpenHashSetTests
@@ -33,6 +42,14 @@ public class IntHashSetTests
 	{
 		@Override
 		protected IntCollection create(int[] data) { return new IntOpenCustomHashSet(data, new DefaultStrategy()); }
+		
+		@Override
+		protected EnumSet<CollectionTest> getValidCollectionTests()
+		{
+			EnumSet<CollectionTest> tests = super.getValidCollectionTests();
+			tests.remove(CollectionTest.TO_STRING);
+			return tests;
+		}
 	}
 	
 	public static class IntLinkedOpenCustomHashSetTests extends BaseIntOpenHashSetTests

src/test/java/speiger/src/collections/tests/CollectionTest.java

@@ -14,5 +14,6 @@ public enum CollectionTest
 	RETAIN_ALL,
 	TO_ARRAY,
 	CLEAR,
-	WRAPPER;
+	WRAPPER,
+	TO_STRING;
 }