t.Run(tt.name, func(t *testing.T) {
			if got := tt.first.Equals(tt.second); got != tt.want {
				t.Errorf("Unexpected Equal. got %v, want %v", got, tt.want)
			}
		})
	}
}

func TestMerge(t *testing.T) {
	cases := []struct {
		s1, s2   Set[string]
		expected []string
	}{
		{
			s1:       New("a1", "a2"),
			s2:       New("a1", "a2"),
			expected: []string{"a1", "a2"},
		},
		{