add unit test for csv method

provider/pkg/provider/aws/bastion_test.go

@@ -0,0 +1,83 @@
+package aws
+
+import (
+	"testing"
+)
+
+func TestUserDataArgs_JoinedTags(t *testing.T) {
+	type fields struct {
+		ParameterName string
+		Route         string
+		Region        string
+		TailscaleTags []string
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   string
+	}{
+		{
+			name: "no tags",
+			fields: fields{
+				TailscaleTags: []string{},
+			},
+			want: "",
+		},
+		{
+			name: "single tag",
+			fields: fields{
+				TailscaleTags: []string{"tag1"},
+			},
+			want: "tag:tag1",
+		},
+		{
+			name: "multiple tags",
+			fields: fields{
+				TailscaleTags: []string{"tag1", "tag2", "tag3"},
+			},
+			want: "tag:tag1,tag:tag2,tag:tag3",
+		},
+		{
+			name: "tags with spaces",
+			fields: fields{
+				TailscaleTags: []string{"tag 1", "tag 2"},
+			},
+			want: "tag:tag 1,tag:tag 2",
+		},
+		{
+			name: "tags with special characters",
+			fields: fields{
+				TailscaleTags: []string{"tag-1", "tag@2", "tag#3"},
+			},
+			want: "tag:tag-1,tag:tag@2,tag:tag#3",
+		},
+		{
+			name: "nil slice",
+			fields: fields{
+				TailscaleTags: nil,
+			},
+			want: "",
+		},
+		{
+			name: "slice with empty strings",
+			fields: fields{
+				TailscaleTags: []string{"", ""},
+			},
+			want: "tag:,tag:",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			uda := &UserDataArgs{
+				ParameterName: tt.fields.ParameterName,
+				Route:         tt.fields.Route,
+				Region:        tt.fields.Region,
+				TailscaleTags: tt.fields.TailscaleTags,
+			}
+			if got := uda.JoinedTags(); got != tt.want {
+				t.Errorf("UserDataArgs.JoinedTags() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}