### Question:
MicroserviceStraceData { public String getResultBufferAsString() { StringBuilder stringBuilder = new StringBuilder(""); for (String line: this.resultBuffer) { stringBuilder.append(line).append("\n"); } return stringBuilder.toString(); } MicroserviceStraceData(String microserviceUuid, int pid, boolean straceRun); String getMicroserviceUuid(); List<String> getResultBuffer(); void setResultBuffer(List<String> resultBuffer); int getPid(); void setPid(int pid); AtomicBoolean getStraceRun(); void setStraceRun(boolean straceRun); @Override String toString(); @Override boolean equals(Object o); @Override int hashCode(); String getResultBufferAsString();  }### Answer:
@Test public void testGetResultBufferAsString() { resultBuffer.add("data"); microserviceStraceData.setResultBuffer(resultBuffer); assertTrue(microserviceStraceData.getResultBufferAsString() instanceof String); assertEquals("data\n", microserviceStraceData.getResultBufferAsString()); assertTrue(microserviceStraceData.getResultBuffer() instanceof List); }