Support GOPATH mode build/test for its transitional situation

test.sh

@@ -1,7 +1,23 @@
 #!/usr/bin/env bash
 set -e
 
-export GO111MODULE=on
+# this if... will be removed when gomodules goes default
+if [ $GO111MODULE == "off" ]; then
+	echo "Warning: this will be deprecated in near future so please use go modules!"
 
-bash -c "umask 0; go test -v -covermode=count -coverprofile=coverage.out ./..."
+	ORG_PATH="github.com/intel"
+	REPO_PATH="${ORG_PATH}/multus-cni"
 
+	if [ ! -h gopath/src/${REPO_PATH} ]; then
+		mkdir -p gopath/src/${ORG_PATH}
+		ln -s ../../../.. gopath/src/${REPO_PATH} || exit 255
+	fi
+
+	export GO15VENDOREXPERIMENT=1
+	export GOBIN=${PWD}/bin
+	export GOPATH=${PWD}/gopath
+	bash -c "umask 0; cd ${GOPATH}/src/${REPO_PATH}; PATH=${GOROOT}/bin:$(pwd)/bin:${PATH} go test -v -covermode=count -coverprofile=coverage.out ./..."
+else
+	# test with go modules
+	bash -c "umask 0; go test -v -covermode=count -coverprofile=coverage.out ./..."
+fi