### Question:
KTypeStack extends KTypeArrayList<KType> { public void push(KType e1) { ensureBufferSpace(1); buffer[elementsCount++] = e1; } KTypeStack();  KTypeStack(int expectedElements);  KTypeStack(int expectedElements, ArraySizingStrategy resizer);  KTypeStack(KTypeContainer<KType> container); void push(KType e1); void push(KType e1, KType e2); void push(KType e1, KType e2, KType e3); void push(KType e1, KType e2, KType e3, KType e4); void push(KType[] elements, int start, int len); @SafeVarargs /* #end */ final void push(KType... elements); int pushAll(KTypeContainer<? extends KType> container); int pushAll(Iterable<? extends KTypeCursor<? extends KType>> iterable); void discard(int count); void discard(); KType pop(); KType peek(); @SafeVarargs /* #end */ static KTypeStack<KType> from(KType... elements); @Override KTypeStack<KType> clone();  }### Answer:
@Test public void testPushArray() { stack.push(asArray(1, 2, 3, 4), 1, 2); assertEquals(2, stack.size()); assertEquals2(key2, stack.get(0)); assertEquals2(key3, stack.get(1)); }