### Question:
ItemCollection implements Cloneable { public void removeItem(String name) { if (name != null) { name = name.toLowerCase().trim(); this.hash.remove(name); } } ItemCollection();  ItemCollection(Map<String, List<Object>> map);  ItemCollection(ItemCollection itemCol); static ItemCollection createByReference(final Map<String, List<Object>> map); @Override Object clone(); @SuppressWarnings("unchecked") ItemCollection clone(final List<String> itemNames); boolean equals(Object o); ItemCollection setItemValue(String itemName, Object itemValue); ItemCollection setItemValueUnique(String itemName, Object itemValue); ItemCollection appendItemValue(String itemName, Object itemValue); ItemCollection appendItemValueUnique(String itemName, Object itemValue); @SuppressWarnings("rawtypes") List getItemValue(String itemName); @SuppressWarnings("unchecked") T getItemValue(String itemName, Class<T> itemType); @SuppressWarnings("unchecked") List<T> getItemValueList(String itemName, Class<T> itemType); void removeItem(String name); boolean hasItem(String aName); boolean isItemEmpty(String itemName); boolean isItemValueInteger(String aName); boolean isItemValueLong(String aName); boolean isItemValueDouble(String aName); boolean isItemValueFloat(String aName); boolean isItemValueDate(String aName); Map<String, List<Object>> getAllItems(); void setAllItems(Map<String, List<Object>> aHash); List<String> getItemNames(); void replaceItemValue(String itemName, Object itemValue); String getItemValueString(String itemName); int getItemValueInteger(String itemName); long getItemValueLong(String itemName); Date getItemValueDate(String aName); LocalDateTime getItemValueLocalDateTime(String aName); LocalDate getItemValueLocalDate(String aName); double getItemValueDouble(String itemName); float getItemValueFloat(String itemName); boolean getItemValueBoolean(String itemName); @SuppressWarnings("unchecked") void replaceAllItems(Map<String, List<Object>> map); void copy(ItemCollection source); @SuppressWarnings("unchecked") void mergeItems(Map<String, List<Object>> map); @SuppressWarnings("unchecked") void purgeItemValue(String itemName); @SuppressWarnings("unchecked") void addFileData(FileData filedata); @SuppressWarnings("unchecked") @Deprecated void addFile(byte[] data, String fileName, String contentType); @Deprecated List<Object> getFile(String filename); FileData getFileData(String filename); @SuppressWarnings({ "unchecked", "rawtypes" }) List<FileData> getFileData(); @SuppressWarnings("unchecked") void removeFile(String aFilename); @Deprecated @SuppressWarnings("unchecked") Map<String, List<Object>> getFiles(); @SuppressWarnings("unchecked") List<String> getFileNames(); Map<String, ?> getItem(); Map<String, ?> getItemList(); Map<String, ?> getItemListArray(); String getType(); void setType(String type); int getTaskID(); void setTaskID(int taskID); ItemCollection task(int taskID); int getEventID(); void setEventID(int eventID); ItemCollection event(int eventID); String getModelVersion(); void setModelVersion(String modelversion); ItemCollection model(String modelversion); String getWorkflowGroup(); void setWorkflowGroup(String group); ItemCollection workflowGroup(String group); String getUniqueID(); @Deprecated int getProcessID(); @Deprecated int getActivityID(); @Deprecated void setActivityID(int activityID);  }### Answer:
@Test @Category(ItemCollection.class) public void testRemoveItem() { ItemCollection itemCollection = new ItemCollection(); itemCollection.replaceItemValue("txtTitel", "Hello"); Assert.assertEquals(itemCollection.getItemValueString("txttitel"), "Hello"); Assert.assertTrue(itemCollection.hasItem("txtTitel")); itemCollection.removeItem("TXTtitel"); Assert.assertFalse(itemCollection.hasItem("txtTitel")); Assert.assertEquals(itemCollection.getItemValueString("txttitel"), ""); }