TMY loading improvements

pvlib/test/test_tmy.py

@@ -4,14 +4,41 @@
 import inspect
 import os
 
+from pandas.util.testing import network
+
 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)
+
+@network
+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_readtmy3_coerce_year():
+    coerce_year = 1987
+    data, meta = tmy.readtmy3(tmy3_testfile, coerce_year=coerce_year)
+    assert (data.index.year == 1987).all()
+
+def test_readtmy3_no_coerce_year():
+    coerce_year = None
+    data, meta = tmy.readtmy3(tmy3_testfile, coerce_year=coerce_year)
+    assert 1997 and 1999 in data.index.year
 
 def test_readtmy2():
-    tmy.readtmy2(os.path.join(test_dir, '../data/12839.tm2'))
+    tmy.readtmy2(tmy2_testfile)