Add log lines to debug test

pkg/drivers/drivers.go

@@ -17,6 +17,7 @@ limitations under the License.
 package drivers
 
 import (
+	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
@@ -153,7 +154,8 @@ func fixPermissions(path string) error {
 
 // InstallOrUpdate downloads driver if it is not present, or updates it if there's a newer version
 func InstallOrUpdate(driver, destination string, minikubeVersion semver.Version) error {
-	_, err := exec.LookPath(driver)
+	path, err := exec.LookPath(driver)
+	fmt.Printf("IntallOrUpdate: found driver at %s\n", path)
 	// if file driver doesn't exist, download it
 	if err != nil {
 		return download(driver, destination)
@@ -168,6 +170,8 @@ func InstallOrUpdate(driver, destination string, minikubeVersion semver.Version)
 
 	v := ExtractVMDriverVersion(string(output))
 
+	fmt.Printf("IntallOrUpdate: extracted version: %s minikube version: %s\n", v, minikubeVersion.String())
+
 	// if the driver doesn't return any version, download it
 	if len(v) == 0 {
 		return download(driver, destination)

test/integration/driver_install_or_update_test.go

@@ -53,12 +53,15 @@ func TestDriverInstallOrUpdate(t *testing.T) {
 		}
 		defer os.RemoveAll(dir)
 
+		fmt.Printf("InstallOrUpdate temp dir: %s\n", dir)
+
 		_, err = os.Stat(filepath.Join(tc.path, "docker-machine-driver-kvm2"))
 		if err != nil {
 			t.Fatalf("Expected driver to exist. test: %s, got: %v", tc.name, err)
 		}
 
 		os.Setenv("PATH", fmt.Sprintf("%s:%s", tc.path, os.Getenv("PATH")))
+		fmt.Printf("InstallOrUpdate PATH: %s\n", os.Getenv("PATH"))
 
 		newerVersion, err := semver.Make("1.1.3")
 		if err != nil {