[1239] libdhcp++/IfaceMgr test improvements:

- unlink() moved to destructor as suggested by Jinmei
- added missing dummy interfaces.txt

src/lib/dhcp/tests/iface_mgr_unittest.cc

@@ -55,6 +55,10 @@ public:
         fakeifaces << LOOPBACK << " ::1";
         fakeifaces.close();
     }
+
+    ~IfaceMgrTest() {
+            unlink(INTERFACE_FILE);
+    }
 };
 
 // We need some known interface to work reliably. Loopback interface
@@ -147,6 +151,8 @@ TEST_F(IfaceMgrTest, dhcp6Sniffer) {
 TEST_F(IfaceMgrTest, basic) {
     // checks that IfaceManager can be instantiated
 
+    createLoInterfacesTxt();
+
     IfaceMgr & ifacemgr = IfaceMgr::instance();
     ASSERT_TRUE(&ifacemgr != 0);
 }
@@ -159,13 +165,14 @@ TEST_F(IfaceMgrTest, ifaceClass) {
     EXPECT_STREQ("eth5/7", iface->getFullName().c_str());
 
     delete iface;
-
 }
 
 // TODO: Implement getPlainMac() test as soon as interface detection
 // is implemented.
 TEST_F(IfaceMgrTest, getIface) {
 
+    createLoInterfacesTxt();
+
     cout << "Interface checks. Please ignore socket binding errors." << endl;
     NakedIfaceMgr* ifacemgr = new NakedIfaceMgr();
 
@@ -209,6 +216,7 @@ TEST_F(IfaceMgrTest, getIface) {
     EXPECT_EQ(static_cast<void*>(NULL), ifacemgr->getIface("wifi0") );
 
     delete ifacemgr;
+
 }
 
 TEST_F(IfaceMgrTest, detectIfaces) {
@@ -239,7 +247,6 @@ TEST_F(IfaceMgrTest, detectIfaces) {
     EXPECT_STREQ( "fe80::1234", addr.toText().c_str() );
 
     delete ifacemgr;
-    unlink(INTERFACE_FILE);
 }
 
 TEST_F(IfaceMgrTest, sockets6) {
@@ -272,7 +279,6 @@ TEST_F(IfaceMgrTest, sockets6) {
     close(socket2);
 
     delete ifacemgr;
-    unlink(INTERFACE_FILE);
 }
 
 // TODO: disabled due to other naming on various systems
@@ -356,7 +362,6 @@ TEST_F(IfaceMgrTest, sendReceive6) {
     EXPECT_TRUE( (rcvPkt->remote_port_ == 10546) || (rcvPkt->remote_port_ == 10547) );
 
     delete ifacemgr;
-    unlink(INTERFACE_FILE);
 }
 
 TEST_F(IfaceMgrTest, sendReceive4) {
@@ -468,7 +473,6 @@ TEST_F(IfaceMgrTest, socket4) {
     close(socket1);
 
     delete ifacemgr;
-    unlink(INTERFACE_FILE);
 }
 
 // Test the Iface structure itself
@@ -598,7 +602,6 @@ TEST_F(IfaceMgrTest, socketInfo) {
     );
 
     delete ifacemgr;
-    unlink(INTERFACE_FILE);
 }
 
 }