package tts

import "testing"

// TestSniffAudio 锁定字节嗅探的判据表：认得的容器各自给出正确的格式名，
// 「不是音频」一律 ("" , false) —— 这一条是"绝不把 JSON/HTML 当音频"的地基。
func TestSniffAudio(t *testing.T) {
	cases := []struct {
		name   string
		data   []byte
		format string
		ok     bool
	}{
		{"wav", wavBytes("x"), "wav", true},
		{"mp3-id3", append([]byte("ID3"), 0, 0, 0, 0, 0, 0), "mp3", true},
		{"mp3-frame", []byte{0xFF, 0xFB, 0x90, 0x00}, "mp3", true},
		{"ogg", []byte("OggS\x00\x02"), "ogg", true},
		{"flac", []byte("fLaC\x00\x00\x00\x22"), "flac", true},
		{"m4a", []byte{0, 0, 0, 0x20, 'f', 't', 'y', 'p', 'M', '4', 'A', ' '}, "m4a", true},
		{"webm", []byte{0x1A, 0x45, 0xDF, 0xA3, 0x01}, "webm", true},
		{"amr", []byte("#!AMR\n"), "amr", true},
		{"json", []byte(`{"detail":"nope"}`), "", false},
		{"html", []byte("<html><body>502</body></html>"), "", false},
		{"empty", nil, "", false},
		{"riff-not-wave", append([]byte("RIFF"), []byte("\x00\x00\x00\x00AVI ")...), "", false},
	}
	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			format, ok := sniffAudio(c.data)
			if ok != c.ok || format != c.format {
				t.Fatalf("sniffAudio = (%q,%v), want (%q,%v)", format, ok, c.format, c.ok)
			}
		})
	}
}