### Question:
AbstractPerformanceDataBuilder { static String addUnknownPerformanceDataRow(String data, String stepName) { return addPerformanceDataRow(data, stepName, "U", null, null); }    }### Answer:
@Test public void testAddUnknonwPerformanceData() throws Exception { assertEquals(AbstractPerformanceDataBuilder.addUnknownPerformanceDataRow("", "my_name_test"), "my_name_test=U;;;;"); }