Parametrize tests

tests/leverage/test_leverage.py

@@ -1,65 +1,37 @@
 from decimal import Decimal
+from math import isclose
+
+import pytest
 
 from freqtrade.leverage import interest
 
 
-# from freqtrade.exceptions import OperationalException
-binance = "binance"
-kraken = "kraken"
-ftx = "ftx"
-other = "bittrex"
+ten_mins = Decimal(1/6)
+five_hours = Decimal(5.0)
+twentyfive_hours = Decimal(25.0)
 
 
-def test_interest():
-
-    borrowed = Decimal(60.0)
-    interest_rate = Decimal(0.0005)
-    interest_rate_2 = Decimal(0.00025)
-    ten_mins = Decimal(1/6)
-    five_hours = Decimal(5.0)
-
-    # Binance
-    assert float(interest(
-        exchange_name=binance,
-        borrowed=borrowed,
-        rate=interest_rate,
-        hours=ten_mins
-    )) == 0.00125
-
-    assert float(interest(
-        exchange_name=binance,
-        borrowed=borrowed,
-        rate=interest_rate_2,
-        hours=five_hours
-    )) == 0.003125
-
+@pytest.mark.parametrize('exchange,interest_rate,hours,expected', [
+    ('binance', 0.0005, ten_mins, 0.00125),
+    ('binance', 0.00025, ten_mins, 0.000625),
+    ('binance', 0.00025, five_hours, 0.003125),
+    ('binance', 0.00025, twentyfive_hours, 0.015625),
     # Kraken
-    assert float(interest(
-        exchange_name=kraken,
-        borrowed=borrowed,
-        rate=interest_rate,
-        hours=ten_mins
-    )) == 0.06
-
-    assert float(interest(
-        exchange_name=kraken,
-        borrowed=borrowed,
-        rate=interest_rate_2,
-        hours=five_hours
-    )) == 0.045
-
+    ('kraken', 0.0005, ten_mins, 0.06),
+    ('kraken', 0.00025, ten_mins, 0.03),
+    ('kraken', 0.00025, five_hours, 0.045),
+    ('kraken', 0.00025, twentyfive_hours, 0.12),
     # FTX
-    # TODO-lev
-    # assert float(interest(
-    #     exchange_name=ftx,
-    #     borrowed=borrowed,
-    #     rate=interest_rate,
-    #     hours=ten_mins
-    # )) == 0.00125
+    # TODO-lev: - implement FTX tests
+    # ('ftx', Decimal(0.0005), ten_mins, 0.06),
+    # ('ftx', Decimal(0.0005), five_hours, 0.045),
+])
+def test_interest(exchange, interest_rate, hours, expected):
+    borrowed = Decimal(60.0)
 
-    # assert float(interest(
-    #     exchange_name=ftx,
-    #     borrowed=borrowed,
-    #     rate=interest_rate_2,
-    #     hours=five_hours
-    # )) == 0.003125
+    assert isclose(interest(
+        exchange_name=exchange,
+        borrowed=borrowed,
+        rate=Decimal(interest_rate),
+        hours=hours
+    ), expected)