ut: add the unit tests for pkg/ingress/mcp

Signed-off-by: charlie <qianglin98@qq.com>

pkg/ingress/mcp/generator_test.go

@@ -0,0 +1,60 @@
+package mcp
+
+import (
+	"testing"
+
+	extensions "istio.io/api/extensions/v1alpha1"
+	networking "istio.io/api/networking/v1alpha3"
+	"istio.io/istio/pkg/config"
+)
+
+func Test_generate(t *testing.T) {
+	tests := []struct {
+		Name  string
+		Spec  config.Spec
+		IsErr bool
+	}{
+		{
+			Name:  "VirtualService",
+			Spec:  &networking.VirtualService{},
+			IsErr: false,
+		},
+		{
+			Name:  "Gateway",
+			Spec:  &networking.Gateway{},
+			IsErr: false,
+		},
+		{
+			Name:  "EnvoyFilter",
+			Spec:  &networking.EnvoyFilter{},
+			IsErr: false,
+		},
+		{
+			Name:  "DestinationRule",
+			Spec:  &networking.DestinationRule{},
+			IsErr: false,
+		},
+		{
+			Name:  "WasmPlugin",
+			Spec:  extensions.WasmPlugin{},
+			IsErr: false,
+		},
+		{
+			Name:  "string",
+			Spec:  "test",
+			IsErr: true,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.Name, func(t *testing.T) {
+			cfg := config.Config{
+				Spec: test.Spec,
+			}
+			_, _, err := generate(nil, []config.Config{cfg}, nil, nil)
+			if (err != nil && !test.IsErr) || (err == nil && test.IsErr) {
+				t.Errorf("Failed to generate config: %v", err)
+			}
+		})
+	}
+}