Warn when a user tries to set a profile name that is unlikely to be valid

cmd/minikube/cmd/config/util.go

@@ -27,6 +27,7 @@ import (
 	"k8s.io/minikube/pkg/minikube/cluster"
 	"k8s.io/minikube/pkg/minikube/command"
 	"k8s.io/minikube/pkg/minikube/config"
+	pkgConfig "k8s.io/minikube/pkg/minikube/config"
 	"k8s.io/minikube/pkg/minikube/constants"
 	"k8s.io/minikube/pkg/minikube/exit"
 	"k8s.io/minikube/pkg/minikube/machine"
@@ -226,3 +227,31 @@ func EnableOrDisableStorageClasses(name, val string) error {
 
 	return EnableOrDisableAddon(name, val)
 }
+
+//ValidateProfile checks if the profile user is trying to switch exists, else throws error
+func ValidateProfile(profile string) error {
+	var profileFound bool
+	validProfiles, invalidProfiles, err := pkgConfig.ListProfiles()
+	if err != nil {
+		exit.WithError("Not able to retrieve profile list", err)
+	}
+
+	// handling invalid profiles
+	for _, invalidProf := range invalidProfiles {
+		if profile == invalidProf.Name {
+			return errors.New("You are trying to switch to invalid profile")
+		}
+	}
+
+	// valid profiles if found, setting profileFound to true
+	for _, prof := range validProfiles {
+		if prof.Name == profile {
+			profileFound = true
+			break
+		}
+	}
+	if !profileFound {
+		return errors.New("Profile you are trying to switch is not found")
+	}
+	return nil
+}

cmd/minikube/cmd/config/util_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package config
 
 import (
+	"fmt"
 	"testing"
 
 	"k8s.io/minikube/pkg/minikube/assets"
@@ -111,3 +112,26 @@ func TestIsAddonAlreadySet(t *testing.T) {
 		}
 	}
 }
+
+func TestValidateProfile(t *testing.T) {
+	testCases := []struct {
+		profileName string
+		expectErr   string
+	}{
+		{
+			profileName: "not_so_common",
+			expectErr:   "Profile you are trying to switch is not found",
+		},
+	}
+
+	for _, test := range testCases {
+		profileNam := test.profileName
+		expectedMsg := test.expectErr
+
+		err := ValidateProfile(profileNam)
+		fmt.Println(err.Error())
+		if err.Error() != expectedMsg {
+			t.Errorf("Didnt receive expected message")
+		}
+	}
+}