add unit test for feature gate supports

pkg/drivers/kic/kic.go

@@ -223,6 +223,7 @@ func (d *Driver) Start() error {
 		}
 		return nil
 	}
+	// TODO:medyagh maybe make it idempotent
 	return fmt.Errorf("cant start a not-stopped (%s) kic node", s)
 }
 

pkg/minikube/bootstrapper/bsutil/featuregates.go

@@ -26,9 +26,8 @@ import (
 	"k8s.io/kubernetes/cmd/kubeadm/app/features"
 )
 
-// supports indicates whether a feature name is supported on the
-// feature gates for kubeadm
-func supports(featureName string) bool {
+// supportedFG indicates whether a feature name is supported by the bootstrapper
+func supportedFG(featureName string) bool {
 	for k := range features.InitFeatureGates {
 		if featureName == k {
 			return true
@@ -54,7 +53,7 @@ func parseFeatureArgs(featureGates string) (map[string]bool, string, error) {
 		k := strings.TrimSpace(fg[0])
 		v := strings.TrimSpace(fg[1])
 
-		if !supports(k) {
+		if !supportedFG(k) {
 			componentFeatureArgs = fmt.Sprintf("%s%s,", componentFeatureArgs, s)
 			continue
 		}

pkg/minikube/bootstrapper/bsutil/featuregates_test.go

@@ -65,3 +65,30 @@ func TestParseFeatureArgs(t *testing.T) {
 		})
 	}
 }
+
+func TestSupport(t *testing.T) {
+
+	tests := []struct {
+		name     string
+		expected bool
+	}{
+		{
+			name:     "CoreDNS",
+			expected: true,
+		},
+		{
+			name:     "Life is Beautiful !",
+			expected: false,
+		},
+		{
+			name:     "",
+			expected: false,
+		},
+	}
+	for _, tc := range tests {
+		if supportedFG(tc.name) != tc.expected {
+			t.Errorf("expected supportedFG(%s) to be %t ! ", tc.name, tc.expected)
+		}
+	}
+
+}