Add test for av-forex-daily.

Author: Matthew Hall

pandas_datareader/tests/av/test_av_time_series.py

@@ -194,3 +194,17 @@ def test_av_intraday(self):
         assert len(df) > 1000
         assert "open" in df.columns
         assert "close" in df.columns
+
+    def test_av_forex_daily(self):
+        df = web.DataReader(
+            "USD/JPY",
+            "av-forex-daily",
+            start=self.start,
+            end=self.end,
+            retry_count=6,
+            pause=20.5,
+        )
+        assert df.columns.equals(self.col_index[:4]) # No volume col for forex
+        assert len(df) == 718
+        assert df.loc["2015-02-09"]["close"] == 118.6390
+        assert df.loc["2017-05-24"]["high"] == 112.1290