1 files changed, 37 insertions, 0 deletions
diff --git a/TOOLS/lua/nan-test.lua b/TOOLS/lua/nan-test.lua
new file mode 100644
index 0000000000..d3f1c8cc8f
--- /dev/null
+++ b/TOOLS/lua/nan-test.lua
@@ -0,0 +1,37 @@
+-- Test a float property which internally uses NaN.
+-- Run with --no-config (or just scale-param1 not set).
+
+local utils = require 'mp.utils'
+
+prop_name = "scale-param1"
+
+-- internal NaN, return string "default" instead of NaN
+v = mp.get_property_native(prop_name, "fail")
+print("Exp:", "string", "\"default\"")
+print("Got:", type(v), utils.to_string(v))
+
+v = mp.get_property(prop_name)
+print("Exp:", "default")
+print("Got:", v)
+
+-- not representable -> return provided fallback value
+v = mp.get_property_number(prop_name, -100)
+print("Exp:", -100)
+print("Got:", v)
+
+mp.set_property_native(prop_name, 123)
+v = mp.get_property_number(prop_name, -100)
+print("Exp:", "number", 123)
+print("Got:", type(v), utils.to_string(v))
+
+-- try to set an actual NaN
+st, msg = mp.set_property_number(prop_name, 0.0/0)
+print("Exp:", nil, "<message>")
+print("Got:", st, msg)
+
+-- set default
+mp.set_property(prop_name, "default")
+
+v = mp.get_property(prop_name)
+print("Exp:", "default")
+print("Got:", v)