TST: Extra test for reading/writing ohlc ratios

tests/data/test_minute_bars.py

@@ -135,6 +135,47 @@ class BcolzMinuteBarTestCase(WithTradingCalendars,
 
         self.assertEquals(50.0, volume_price)
 
+    def test_write_one_ohlcv_with_ratios(self):
+        minute = self.market_opens[self.test_calendar_start]
+        sid = 1
+        data = DataFrame(
+            data={
+                'open': [10.0],
+                'high': [20.0],
+                'low': [30.0],
+                'close': [40.0],
+                'volume': [50.0],
+            },
+            index=[minute],
+        )
+
+        # Create a new writer with `ohlc_ratios_per_sid` defined.
+        writer_with_ratios = BcolzMinuteBarWriter(
+            self.dest,
+            self.trading_calendar,
+            TEST_CALENDAR_START,
+            TEST_CALENDAR_STOP,
+            US_EQUITIES_MINUTES_PER_DAY,
+            ohlc_ratios_per_sid={sid: 25},
+        )
+        writer_with_ratios.write_sid(sid, data)
+        reader = BcolzMinuteBarReader(self.dest)
+
+        open_price = reader.get_value(sid, minute, 'open')
+        self.assertEquals(10.0, open_price)
+
+        high_price = reader.get_value(sid, minute, 'high')
+        self.assertEquals(20.0, high_price)
+
+        low_price = reader.get_value(sid, minute, 'low')
+        self.assertEquals(30.0, low_price)
+
+        close_price = reader.get_value(sid, minute, 'close')
+        self.assertEquals(40.0, close_price)
+
+        volume_price = reader.get_value(sid, minute, 'volume')
+        self.assertEquals(50.0, volume_price)
+
     def test_write_two_bars(self):
         minute_0 = self.market_opens[self.test_calendar_start]
         minute_1 = minute_0 + timedelta(minutes=1)