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

cmd/minikube/cmd/config/profile.go

@@ -47,6 +47,12 @@ var ProfileCmd = &cobra.Command{
 		profile := args[0]
 		if profile == "default" {
 			profile = "minikube"
+		} else {
+			// not validating when it is default profile
+			errProfile, ok := ValidateProfile(profile)
+			if !ok && errProfile != nil {
+				out.FailureT(errProfile.Msg)
+			}
 		}
 		err := Set(pkgConfig.MachineProfile, profile)
 		if err != nil {

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 +227,42 @@ func EnableOrDisableStorageClasses(name, val string) error {
 
 	return EnableOrDisableAddon(name, val)
 }
+
+// ErrValidateProfile Error to validate profile
+type ErrValidateProfile struct {
+	Name string
+	Msg  string
+}
+
+func (e ErrValidateProfile) Error() string {
+	return e.Msg
+}
+
+// ValidateProfile checks if the profile user is trying to switch exists, else throws error
+func ValidateProfile(profile string) (*ErrValidateProfile, bool) {
+
+	validProfiles, invalidProfiles, err := pkgConfig.ListProfiles()
+	if err != nil {
+		out.FailureT(err.Error())
+	}
+
+	// handling invalid profiles
+	for _, invalidProf := range invalidProfiles {
+		if profile == invalidProf.Name {
+			return &ErrValidateProfile{Name: profile, Msg: fmt.Sprintf("%q is an invalid profile", profile)}, false
+		}
+	}
+
+	profileFound := false
+	// valid profiles if found, setting profileFound to trueexpectedMsg
+	for _, prof := range validProfiles {
+		if prof.Name == profile {
+			profileFound = true
+			break
+		}
+	}
+	if !profileFound {
+		return &ErrValidateProfile{Name: profile, Msg: fmt.Sprintf("profile %q not found", profile)}, false
+	}
+	return nil, true
+}

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
+	}{
+		{
+			profileName: "82374328742_2974224498",
+		},
+		{
+			profileName: "minikube",
+		},
+	}
+
+	for _, test := range testCases {
+		profileNam := test.profileName
+		expectedMsg := fmt.Sprintf("profile %q not found", test.profileName)
+
+		err, ok := ValidateProfile(profileNam)
+		if !ok && err.Error() != expectedMsg {
+			t.Errorf("Didnt receive expected message")
+		}
+	}
+}