From f728597ce495ae1bddcff606b7086f0c13044d13 Mon Sep 17 00:00:00 2001
From: Christoph Groth <christoph.groth@cea.fr>
Date: Fri, 30 Jun 2017 12:09:24 +0200
Subject: [PATCH] add (failing) test for zero-valued selfenergy leads
That test fails because the result of the selfenergy callback is used as a
numpy array without a call to asarray.
---
kwant/tests/test_builder.py | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/kwant/tests/test_builder.py b/kwant/tests/test_builder.py
index b31c0dc0..bc61f971 100644
--- a/kwant/tests/test_builder.py
+++ b/kwant/tests/test_builder.py
@@ -1085,6 +1085,15 @@ def test_ModesLead_and_SelfEnergyLead():
ts2 = [kwant.greens_function(fsyst, e).transmission(1, 0) for e in energies]
assert_almost_equal(ts2, ts)
+ # Append a virtual (=zero self energy) lead. This should have no effect.
+ # Also verifies that the selfenergy callback function can return exotic
+ # arraylikes.
+ syst.leads.append(builder.SelfEnergyLead(
+ lambda *args: list(ta.zeros((L, L))), interface))
+ fsyst = syst.finalized()
+ ts2 = [kwant.greens_function(fsyst, e).transmission(1, 0) for e in energies]
+ assert_almost_equal(ts2, ts)
+
def test_site_pickle():
site = kwant.lattice.square()(0, 0)
--
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