test(probe): add HDR fixture coverage (#72)

crates/arr-probe/tests/probe.rs

@@ -86,6 +86,28 @@ async fn hdr10_comes_from_the_transfer_function() {
     assert_eq!(file.media.hdr, HdrFormat::Hdr10);
 }
 
+#[tokio::test]
+async fn hlg_comes_from_the_transfer_function() {
+    let file = Prober::new()
+        .probe(fixture("hlg-720p.mkv"))
+        .await
+        .expect("the fixture is readable");
+
+    assert_eq!(file.video_codec, "hevc");
+    assert_eq!(file.media.hdr, HdrFormat::Hlg);
+}
+
+#[tokio::test]
+async fn ten_bit_hevc_without_hdr_transfer_is_sdr() {
+    let file = Prober::new()
+        .probe(fixture("sdr-10bit-hevc-720p.mkv"))
+        .await
+        .expect("the fixture is readable");
+
+    assert_eq!(file.video_codec, "hevc");
+    assert_eq!(file.media.hdr, HdrFormat::Sdr);
+}
+
 #[tokio::test]
 async fn dolby_vision_profile_5_is_reported_as_a_number() {
     let file = Prober::new()