Updated tests to use URL download.

.travis.yml

 language: c
 install:
     - sudo apt-get update -qq
-    - sudo apt-get install -qq python-dev python-pip python-yaml g++
+    - sudo apt-get install -qq python-dev python-pip python-yaml g++ ftp
     - sudo pip install conda
     - sudo conda init
     - conda config --add channels http://conda.binstar.org/omnia

tests/test_build.py

@@ -4,16 +4,21 @@ from pdbfixer.pdbfixer import *
 import os
 import sys
 
-# These are tough PDB codes from http://www.umass.edu/microbio/chime/pe_beta/pe/protexpl/badpdbs.htm
-pdbcodes = ['1AS5', '1CBN', '1DPO', '1IGY', '1HAG', '1IAO', '4CPA', '1QCQ']
+def test_build():
+    # These are tough PDB codes from http://www.umass.edu/microbio/chime/pe_beta/pe/protexpl/badpdbs.htm
+    pdbcodes = ['1AS5', '1CBN', '1DPO', '1IGY', '1HAG', '1IAO', '4CPA', '1QCQ']
+    pdbcodes = ['1VII'] # DEBUG
 
-# Set up PDB retrieval.
-pdblist = PDBList()
+    # Set up PDB retrieval.
+    pdblist = PDBList(server=PDBList.alternative_download_url)
 
-for pdbcode in pdbcodes:
+    success = True
+
+    for pdbcode in pdbcodes:
         try:
             input_pdb_filename = pdblist.retrieve_pdb_file(pdbcode, pdir='.')
-    except:
+        except Exception as e:
+            print str(e)
             print "Could not download PDB code '%s'" % pdbcode
             continue
 
@@ -51,10 +56,9 @@ for pdbcode in pdbcodes:
 
         except Exception as e:
             print str(e)
-        sys.exit(1)
-
+            success = False
 
-# Signal success.
-sys.exit(0)
+    if not success:
+        raise Exception("build test failed on one or more PDB files.")