Added test cases for CurrencyRates class

Author: ravi

forex-python/__init__.py docs/__init__.pyforex-python/__init__.py renamed to docs/__init__.py

@@ -2,13 +2,6 @@
 import datetime
 
 
-class RateNotFoundError(Exception):
-    """
-    Custom exception when conversion rate not found for given Country
-    """
-    pass
-
-
 class RatesNotAvailableError(Exception):
     """
     Custome Exception when http://fixer.io/ is Down are not available for currency rates

forex_python/__init__.py

@@ -0,0 +1,68 @@
+from unittest import TestCase
+from forex_python.converter import CurrencyRates
+
+
+class TestBase(TestCase):
+    def setUp(self):
+        c = CurrencyRates()
+
+
+class TestGetRates(TestBase):
+    """
+    Test get_rates with valid(ex: USD) and invalid(ex: XYZ) currency code
+    """
+    def test_get_rates_valid_code(self):
+        all_rates = c.get_rates('USD')
+
+        # Check if return value of get_rates dictionary
+        self.assertTrue(isinstance(all_rates, dict))
+
+        # Test at least one rate value returned
+        self.assertTrue(len(all_rates.keys()))
+
+        # Test one rate in returned dict is float value
+        self.assertTrue(isinstance(all_rates.get('INR'), float))
+
+    def test_get_rates_invalid_code(self):
+        all_rates = c.get_rates('XYZ')
+
+        # Check if return value of get_rates dictionary
+        self.assertTrue(isinstance(all_rates, dict))
+
+        # Test no values in dict(empty dict)
+        self.assertFalse(len(all_rates.keys()))
+
+        # Test one rate in returned dict is not float value
+        self.assertFalse(isinstance(all_rates.get('INR'), float))
+
+
+class TestGetRate(TestBase):
+    """
+    Test get_rate function using valid and invalid currency codes
+    """
+
+    def test_get_rate_with_valid_codes(self):
+        rate = c.get_rate(self, 'USD', 'INR')
+
+        # check if return value is float
+        self.assertTrue(isinstance(rate, float))
+
+    def test_get_rate_with_invalid_codes(self):
+        # raise exception for invalid currency codes
+        self.assertRaises(RatesNotAvailableError, c.get_rate(self, 'ABCD', 'XYZ'))
+
+
+class TestAmountConvert(TestBase):
+    """
+    test amount conversion from one currency to other
+    """
+
+    def test_amount_convert_valid_currency(self):
+        amount = c.convert('USD', 'INR', 10)
+
+        # test if amount returned in float
+        self.assertTrue(isinstance(amount, float))
+
+    def test_amount_convert_valid_currency(self):
+        # test if amount returned in float
+        self.assertRaises(RateNotFoundError, c.convert('ABC, 'XYZ', 10))