Merge pull request #286 from jgray-19/test_ptc

Add further PTC tests

Author: ldeniau

tests/tests/test-ptc-maps/problems.md

@@ -0,0 +1,26 @@
+  MAD-X:
+
+- KNL[1] and ksl[1] are never communicated to PTC (for bend reasons?)
+- If solenoid strength is zero, PTC ignores it and therefore knl and ksl are not communicated to PTC
+- In a quadrupole, MAD-X removes any input of knl[2] and ksl[2]
+- MAD-X does not communicate tilt in ELSEPARATOR to PTC
+- MAD-X does not allow to turn off fringe in RBEND
+- MAD-X defines a k0 for the crab cavity based on volt
+- MAD-X does not support totalpath in RFMULTIPOLE
+- MAD-X does not support totalpath in CRABCAVITY
+  
+  Other:
+
+- MAD-NG does not support the same syntax for the rf cavity as MAD-X for totalpath
+- MAD-NG does not support the same syntax for the elseparator as MAD-X for exl and eyl
+
+What needs to be tested for MAD-NG vs MAD-NG:
+- General
+  - tilt + skew
+  - backtracking
+  - multipole part vs non multipole part
+  - lots of dkd -> tkt
+  - negation
+
+- Multipole  
+  - Multiple at same point with ksi, ksl, knl seperately and together