big

debug/acoustics_test.gd

@@ -106,6 +106,22 @@ func _process(_delta: float) -> bool:
 		_check(Acoustics.classify(crate) == "wood", "name-based classify: crate -> wood")
 		crate.free()
 
+		# An UNKNOWN acoustic_material must degrade to concrete, not throw.
+		# Sakura Crossing tagged its ballast "gravel" before gravel existed in
+		# MATERIALS, and every hitscan impact on it took down occlusion() from
+		# inside the audio path — a level builder's typo must never be able to
+		# stop the game making sound.
+		var odd := StaticBody3D.new()
+		odd.name = "OddSurface"
+		odd.set_meta("acoustic_material", "unobtainium")
+		_check(Acoustics.classify(odd) == "concrete",
+			"unknown acoustic_material falls back to concrete")
+		odd.free()
+
+		# And every material the level builders actually use must resolve.
+		for m in ["concrete", "wood", "metal", "glass", "brick", "gravel", "grass"]:
+			_check(Acoustics.MATERIALS.has(m), "MATERIALS defines '%s'" % m)
+
 		print("=== Acoustics results: %s ===" % ("ALL PASSED" if _fails == 0 else "%d FAILED" % _fails))
 		return true
 	return false