Add fishing and shoreline sound effects

tests/shoreline_ambience_validation.gd

@@ -0,0 +1,48 @@
+extends SceneTree
+
+const ShorelineAmbienceType := preload("res://world/shoreline_ambience.gd")
+const WavesStream := preload("res://audio/ambience/waves.wav")
+
+
+func _initialize() -> void:
+	call_deferred("_run")
+
+
+func _run() -> void:
+	var waves := WavesStream as AudioStreamWAV
+	assert(waves != null)
+
+	var segments: Array[PackedVector2Array] = [
+		PackedVector2Array([Vector2.ZERO, Vector2(10.0, 0.0)]),
+	]
+	assert(is_equal_approx(
+		ShorelineAmbienceType.distance_to_segments(Vector2(5.0, 3.0), segments),
+		3.0,
+	))
+	assert(is_equal_approx(
+		ShorelineAmbienceType.distance_to_segments(Vector2(-4.0, 0.0), segments),
+		4.0,
+	))
+
+	var controller := ShorelineAmbienceType.new() as ShorelineAmbience
+	var runtime_audio := AudioStreamPlayer.new()
+	runtime_audio.name = "WavesAudio"
+	runtime_audio.unique_name_in_owner = true
+	runtime_audio.stream = WavesStream
+	runtime_audio.bus = &"SFX"
+	controller.add_child(runtime_audio)
+	runtime_audio.owner = controller
+	root.add_child(controller)
+	await process_frame
+	assert(runtime_audio.bus == &"SFX")
+	assert(controller.near_distance < controller.far_distance)
+	assert(controller.near_volume_db > controller.far_volume_db)
+	var runtime_waves := runtime_audio.stream as AudioStreamWAV
+	assert(runtime_waves.loop_mode == AudioStreamWAV.LOOP_FORWARD)
+	assert(runtime_waves.loop_begin == 0)
+	assert(runtime_waves.loop_end == 1044956)
+	controller.free()
+	await process_frame
+
+	print("Shoreline ambience validation: PASS")
+	quit()