add more tmy tests

Author: wholmgren

pvlib/test/test_tmy.py

@@ -5,13 +5,27 @@
 import os
 
 test_dir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
+tmy3_testfile = os.path.join(test_dir, '../data/703165TY.csv')
+tmy2_testfile = os.path.join(test_dir, '../data/12839.tm2')
 
 from pvlib import tmy
 
 
 def test_readtmy3():
-    tmy.readtmy3(os.path.join(test_dir, '../data/703165TY.csv'))
+    tmy.readtmy3(tmy3_testfile)
+    
+def test_readtmy3_remote():
+    url = 'http://rredc.nrel.gov/solar/old_data/nsrdb/1991-2005/data/tmy3/703165TYA.CSV'
+    tmy.readtmy3(url)
+    
+def test_readtmy3_recolumn():
+    data, meta = tmy.readtmy3(tmy3_testfile)
+    assert 'GHISource' in data.columns
+    
+def test_readtmy3_norecolumn():
+    data, meta = tmy.readtmy3(tmy3_testfile, recolumn=False)
+    assert 'GHI source' in data.columns
 
 def test_readtmy2():
-    tmy.readtmy2(os.path.join(test_dir, '../data/12839.tm2'))
+    tmy.readtmy2(tmy2_testfile)