1 files changed, 48 insertions, 9 deletions
diff --git a/test/gie/builtins.gie b/test/gie/builtins.gie
index be491346..3e2059c1 100644
--- a/test/gie/builtins.gie
+++ b/test/gie/builtins.gie
@@ -2418,15 +2418,54 @@ Lagrange
 -------------------------------------------------------------------------------
 operation +proj=lagrng   +a=6400000 +W=2   +lat_1=0.5 +lat_2=2
 -------------------------------------------------------------------------------
-tolerance 0.1 mm
-accept  2 1
-expect  111703.375917226 27929.831908033
-accept  2 -1
-expect  111699.122088816 -83784.178013358
-accept  -2 1
-expect  -111703.375917226 27929.831908033
-accept  -2 -1
-expect  -111699.122088816 -83784.178013358
+tolerance   0.1 mm
+accept      2 1
+expect      111703.375917226 27929.831908033
+
+roundtrip   100
+accept      2 -1
+expect      111699.122088816 -83784.178013358
+roundtrip   100
+
+accept      -2 1
+expect      -111703.375917226 27929.831908033
+roundtrip   100
+
+accept      -2 -1
+expect      -111699.122088816 -83784.178013358
+roundtrip   100
+
+accept      0   90
+expect      0.0000  12800000.0
+roundtrip   100
+
+-------------------------------------------------------------------------------
+operation +proj=lagrng +R=1 +lat_1=56
+-------------------------------------------------------------------------------
+tolerance   1 cm
+accept      12  56
+expect      0.10    0.0
+
+-------------------------------------------------------------------------------
+operation +proj=lagrng +R=1 +W=-1
+-------------------------------------------------------------------------------
+expect      failure errno w_or_m_zero_or_less
+
+-------------------------------------------------------------------------------
+operation +proj=lagrng +R=1 +lat_1=90.00001
+-------------------------------------------------------------------------------
+expect      failure errno lat_larger_than_90
+
+-------------------------------------------------------------------------------
+operation +proj=lagrng +R=1 +W=0.5
+-------------------------------------------------------------------------------
+accept      90 0 0
+expect      failure errno tolerance_condition
+
+direction   inverse
+accept      2 0 0
+expect      failure errno tolerance_condition
+
 
 
 ===============================================================================