* scm/beam.scm (check-slope-callbacks): check sign of slope.

[lilypond.git] / ly / spanners-init.ly

diff --git a/ly/spanners-init.ly b/ly/spanners-init.ly
index 9c4e53db80f9e65e32b6ee8134ee2f8b9b68ce93..6e6ffe1e34fe857915227de53590f5ee81d0819b 100644 (file)
--- a/ly/spanners-init.ly
+++ b/ly/spanners-init.ly
@@ -76,3 +76,27 @@ sostenutoUp = #(make-span-event 'SostenutoEvent STOP)
 %crescpoco = \set crescendoText = "cresc. poco a poco"
 %decresc = \set crescendoText = "decr."
 %dim = \set crescendoText = "dim."
+
+
+% for regression testing purposes.
+assertBeamQuant =
+#(def-music-function (location l r) (pair? pair?)
+  (let* ((f (check-quant-callbacks l r)))
+   
+   #{
+   \once \override Beam #'position-callbacks = $f
+   #}
+   
+))
+
+% for regression testing purposes.
+assertBeamSlope =
+#(def-music-function (location comp) (procedure?)
+  (let* ((f (check-slope-callbacks comp)))
+   
+   #{
+   \once \override Beam #'position-callbacks = $f
+   #}
+   
+))
+