hs-test: refactor test cases from ns suite

This converts more tests to configure VPP from test context.

Type: test
Signed-off-by: Maros Ondrejicka <maros.ondrejicka@pantheon.tech>
Change-Id: Idf26b0c16f87e87c97b198412af39b99d947ced6
diff --git a/extras/hs-test/ldp_test.go b/extras/hs-test/ldp_test.go
index cbba227..17f78ca 100644
--- a/extras/hs-test/ldp_test.go
+++ b/extras/hs-test/ldp_test.go
@@ -3,17 +3,16 @@
 import (
 	"fmt"
 	"os"
-	"time"
 )
 
 func (s *VethsSuite) TestLDPreloadIperfVpp() {
 	var clnVclConf, srvVclConf Stanza
 
 	serverContainer := s.getContainerByName("server-vpp")
-	srvVcl := serverContainer.GetHostWorkDir() + "/vcl_srv.conf"
+	serverVclFileName := serverContainer.GetHostWorkDir() + "/vcl_srv.conf"
 
 	clientContainer := s.getContainerByName("client-vpp")
-	clnVcl := clientContainer.GetHostWorkDir() + "/vcl_cln.conf"
+	clientVclFileName := clientContainer.GetHostWorkDir() + "/vcl_cln.conf"
 
 	ldpreload := os.Getenv("HST_LDPRELOAD")
 	s.assertNotEqual("", ldpreload)
@@ -26,15 +25,9 @@
 
 	s.log("starting VPPs")
 
-	_, err := serverContainer.execAction("Configure2Veths srv")
-	s.assertNil(err)
-
-	_, err = clientContainer.execAction("Configure2Veths cln")
-	s.assertNil(err)
-
 	clientAppSocketApi := fmt.Sprintf("app-socket-api %s/var/run/app_ns_sockets/2",
 		clientContainer.GetContainerWorkDir())
-	err = clnVclConf.
+	err := clnVclConf.
 		NewStanza("vcl").
 		Append("rx-fifo-size 4000000").
 		Append("tx-fifo-size 4000000").
@@ -42,7 +35,7 @@
 		Append("app-scope-global").
 		Append("use-mq-eventfd").
 		Append(clientAppSocketApi).Close().
-		SaveToFile(clnVcl)
+		SaveToFile(clientVclFileName)
 	s.assertNil(err)
 
 	serverAppSocketApi := fmt.Sprintf("app-socket-api %s/var/run/app_ns_sockets/1",
@@ -55,15 +48,12 @@
 		Append("app-scope-global").
 		Append("use-mq-eventfd").
 		Append(serverAppSocketApi).Close().
-		SaveToFile(srvVcl)
+		SaveToFile(serverVclFileName)
 	s.assertNil(err)
 
 	s.log("attaching server to vpp")
 
-	// FIXME
-	time.Sleep(5 * time.Second)
-
-	srvEnv := append(os.Environ(), ldpreload, "VCL_CONFIG="+srvVcl)
+	srvEnv := append(os.Environ(), ldpreload, "VCL_CONFIG="+serverVclFileName)
 	go StartServerApp(srvCh, stopServerCh, srvEnv)
 
 	err = <-srvCh
@@ -71,8 +61,9 @@
 
 	s.log("attaching client to vpp")
 	var clnRes = make(chan string, 1)
-	clnEnv := append(os.Environ(), ldpreload, "VCL_CONFIG="+clnVcl)
-	go StartClientApp(clnEnv, clnCh, clnRes)
+	clnEnv := append(os.Environ(), ldpreload, "VCL_CONFIG="+clientVclFileName)
+	serverVethAddress := s.netInterfaces[serverInterfaceName].Ip4AddressString()
+	go StartClientApp(serverVethAddress, clnEnv, clnCh, clnRes)
 	s.log(<-clnRes)
 
 	// wait for client's result