package com.doublesymmetry.trackplayer

import org.junit.Assert.assertFalse
import org.junit.Assert.assertTrue
import org.junit.Test

/**
 * Unit tests for [isHlsUri], the pure extension-based HLS detection used to
 * decide whether a preload must warm the media SEGMENTS (HlsDownloader) rather
 * than only the manifest bytes (CacheWriter). Mirrors the iOS `.m3u8`/`.m3u`
 * extension check so both platforms classify the same URLs identically.
 */
class HlsUriTest {

    @Test
    fun `m3u8 extension is HLS`() {
        assertTrue(isHlsUri("https://example.com/master.m3u8"))
    }

    @Test
    fun `m3u extension is HLS`() {
        assertTrue(isHlsUri("https://example.com/playlist.m3u"))
    }

    @Test
    fun `extension is matched case-insensitively`() {
        assertTrue(isHlsUri("https://example.com/Master.M3U8"))
    }

    @Test
    fun `query string after the extension is ignored`() {
        assertTrue(isHlsUri("https://example.com/index.m3u8?token=abc&exp=123"))
    }

    @Test
    fun `fragment after the extension is ignored`() {
        assertTrue(isHlsUri("https://example.com/index.m3u8#frag"))
    }

    @Test
    fun `mp3 is not HLS`() {
        assertFalse(isHlsUri("https://example.com/audio.mp3"))
    }

    @Test
    fun `mp4 is not HLS`() {
        assertFalse(isHlsUri("https://example.com/video.mp4"))
    }

    @Test
    fun `a path segment containing m3u8 but not as the extension is not HLS`() {
        assertFalse(isHlsUri("https://example.com/m3u8/audio.mp3"))
    }

    @Test
    fun `empty string is not HLS`() {
        assertFalse(isHlsUri(""))
    }
}