assertEquals("a", synonymItem.getInputs()[0]);
        assertEquals("A", synonymItem.getInputs()[1]);
        assertEquals(2, synonymItem.getOutputs().length);
        assertEquals("b", synonymItem.getOutputs()[0]);
        assertEquals("B", synonymItem.getOutputs()[1]);
        assertNull(synonymItem.getNewInputs());
        assertNull(synonymItem.getNewOutputs());
        assertFalse(synonymItem.isUpdated());

        assertEquals("B1", itemList.get(1).getOutputs()[0]);
        assertFalse(itemList.get(1).isUpdated());

        assertEquals(1, itemList.get(2).getInputs().length);
        assertEquals(2, itemList.get(2).getOutputs().length);
        assertEquals("c1", itemList.get(2).getInputs()[0]);
        assertEquals("C1", itemList.get(2).getOutputs()[0]);
        assertEquals("C2", itemList.get(2).getOutputs()[1]);

        }
        return String.join("\n", inputs);
    }

    /**
     * Gets the original output synonyms.
     *
     * @return The original output synonyms.
     */
    public String[] getOutputs() {
        return outputs;
    }

    /**
     * Gets the output synonyms as a newline-separated string.
     *
     * @return The output synonyms as a string.
     */