feature: cleanup serviceAccount

internal/utils/diff.go

@@ -0,0 +1,23 @@
+package utils
+
+import (
+	"k8s.io/apimachinery/pkg/types"
+)
+
+// DiffNamespacedNames returns the namespaced names that are in target but not in reference.
+func DiffNamespacedNames(target, reference []types.NamespacedName) []types.NamespacedName {
+	referenceSet := make(map[types.NamespacedName]struct{})
+
+	for _, item := range reference {
+		referenceSet[item] = struct{}{}
+	}
+
+	diff := []types.NamespacedName{}
+	for _, item := range target {
+		if _, exists := referenceSet[item]; !exists {
+			diff = append(diff, item)
+		}
+	}
+
+	return diff
+}

internal/utils/diff_test.go

@@ -0,0 +1,87 @@
+package utils
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"k8s.io/apimachinery/pkg/types"
+)
+
+func TestDiffNamespacedNames(t *testing.T) {
+	tests := []struct {
+		name      string
+		target    []types.NamespacedName
+		reference []types.NamespacedName
+		expected  []types.NamespacedName
+	}{
+		{
+			"NoDifference",
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource2"},
+			},
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource2"},
+			},
+			[]types.NamespacedName{},
+		},
+		{
+			"SomeDifference",
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource3"},
+			},
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource2"},
+			},
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource3"},
+			},
+		},
+		{
+			"AllDifferent",
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource2"},
+			},
+			[]types.NamespacedName{
+				{Namespace: "other", Name: "resource3"},
+				{Namespace: "other", Name: "resource4"},
+			},
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource2"},
+			},
+		},
+		{
+			"EmptyTarget",
+			[]types.NamespacedName{},
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource2"},
+			},
+			[]types.NamespacedName{},
+		},
+		{
+			"EmptyReference",
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource2"},
+			},
+			[]types.NamespacedName{},
+			[]types.NamespacedName{
+				{Namespace: "default", Name: "resource1"},
+				{Namespace: "default", Name: "resource2"},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := DiffNamespacedNames(tt.target, tt.reference)
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}