### Question:
OVFUtils { public static String getFileId(String diskId, Disk[] diskList) { String fileId = ""; if (diskList != null && diskList.length>0) { for (int k = 0; k<diskList.length; k++) { Disk disk = diskList[k]; if (disk.getDiskId().equalsIgnoreCase(diskId)) { fileId = disk.getFileRef(); logger.debug("Disk reference: " + fileId); } } } return fileId; }  static String getApplicationName(String ovf); static String getDeploymentName(String ovf); static OvfDefinition getOvfDefinition(String ovf); static int getDiskCapacityInGb(int capacity, String units); static String getIsoPathFromVm(VirtualHardwareSection virtHwSection, OvfDefinition ovfDocument); static boolean usesACacheImage(VirtualSystem virtualSystem1); static boolean containsVMWithThatOvfId(String ovf, String ovfId); static VMLimits getUpperAndLowerVMlimits(VirtualSystem virtualSystem); static int getPriceSchema(ProductSection productSection); static ProductSection getProductionSectionForOvfID(String ovf, String ovfId); static VirtualSystem getVirtualSystemForOvfId(String ovf, String ovfId); static String getDiskId(VirtualHardwareSection virtualHardwareSection); static int getCapacity(OvfDefinition ovfDocument, String diskId); static String getFileId(String diskId, Disk[] diskList); static String getUrlImg(OvfDefinition ovfDocument, String fileId); static AsceticSLAInfo getVMSlaInfo(OvfDefinition ovfDocument, String slaInfoTerm, String ovfId); static AsceticSLAInfo getAppSlaInfo(OvfDefinition ovfDocument, String slaInfoTerm); static List<AsceticTermMeasurement> getVMTermMeasurement(OvfDefinition ovfDocument, String ovfId); static List<String> getOVFVMIds(OvfDefinition ovfDocument);  }### Answer:
@Test public void getFileIdTest() { OvfDefinition ovfDocument = OVFUtils.getOvfDefinition(threeTierWebAppWithUpperLimitsString); String diskId = OVFUtils.getDiskId(ovfDocument.getVirtualSystemCollection().getVirtualSystemAtIndex(0).getVirtualHardwareSection()); String fileId = OVFUtils.getFileId(diskId, ovfDocument.getDiskSection().getDiskArray()); assertEquals("haproxy-img", fileId); }