TST: make sure test passes even if components link isn't present

[cpcloud]

closes #4309

[cpcloud]

@jreback i think this might be broken...

In [1]: from pandas.io import data as web

In [2]: web
Out[2]: <module 'pandas.io.data' from 'pandas/io/data.pyc'>

In [3]: web.get_components_yahoo('^NDX')
Out[3]:
      exchange   name
@^NDX      N/A  @^NDX

In [4]: web.get_components_yahoo??

In [5]: web.get_components_yahoo('^DJI')
Out[5]:
      exchange               name
AA        NYSE  Alcoa Inc. Common
AXP       NYSE  American Express
BA        NYSE  Boeing Company (T
BAC       NYSE  Bank of America C
CAT       NYSE  Caterpillar, Inc.
CSCO  NasdaqNM  Cisco Systems, In
CVX       NYSE  Chevron Corporati
DD        NYSE  E.I. du Pont de N
DIS       NYSE  Walt Disney Compa
GE        NYSE  General Electric
HD        NYSE  Home Depot, Inc.
HPQ       NYSE  Hewlett-Packard C
IBM       NYSE  International Bus
INTC  NasdaqNM  Intel Corporation
JNJ       NYSE  Johnson & Johnson
JPM       NYSE  JP Morgan Chase &
KO        NYSE  Coca-Cola Company
MCD       NYSE  McDonald's Corpor
MMM       NYSE  3M Company Common
MRK       NYSE  Merck & Company,
MSFT  NasdaqNM  Microsoft Corpora
PFE       NYSE  Pfizer, Inc. Comm
PG        NYSE  Procter & Gamble
T         NYSE          AT&T Inc.
TRV       NYSE  The Travelers Com
UNH       NYSE  UnitedHealth Grou
UTX       NYSE  United Technologi
VZ        NYSE  Verizon Communica
WMT       NYSE  Wal-Mart Stores,
XOM       NYSE  Exxon Mobil Corpo

[cpcloud]

i don't think NDX is a valid symbol anymore for whateve reason

[jreback]

yep
just comment out the whole test

[cpcloud]

if i figure this out i'll submit another pr

[cpcloud]

figured it out

http://finance.yahoo.com/q?s=%5ENDX

the link to components doesn't work so that test should be totally removed or test failure

[cpcloud]

or what i could do is check for len(df)>1 and continue the test if it is, because this was valid at some point and i'm guessing might be in the future

[jreback]

that would work

[cpcloud]

is this the last bug for release 0.12? what's going on with the docs stuff?