package msg import ( "testing" ) func TestParseUnsubscribe(t *testing.T) { type tc struct { hdr string expected []string } cases := []*tc{ {"", []string{}}, {"invalid", []string{}}, {", ", []string{ "https://example.com", "http://example.com", }}, {" is a URL", []string{ "https://example.com", }}, {", ", []string{ "mailto:user@host?subject=unsubscribe", "https://example.com", }}, {"<>, ", []string{ "", "https://example", }}, } for _, c := range cases { result := parseUnsubscribeMethods(c.hdr) if len(result) != len(c.expected) { t.Errorf("expected %d methods but got %d", len(c.expected), len(result)) continue } for idx := 0; idx < len(result); idx++ { if result[idx].String() != c.expected[idx] { t.Errorf("expected %v but got %v", c.expected[idx], result[idx]) } } } }